Polymeric self-healing material and method of creating said material

专利摘要:
Abstract POLYMERIC SELF-HEATING MATERIALS THROUGH UNSATURATED POLYESTERS The present invention relates to self-healing materials, which are intelligent materials that are capable of repairing themselves without any external intervention when they are damaged. Self-healing materials can be microencapsulated, for example, in a one-capsule or two-capsule system, and damage to a matrix containing the microcapsules can break the microcapsules and cause the curing materials to be released at the damage site. , where it can polymerize and restore the functional capabilities of the matrix. The self-healing materials can be based on unsaturated multifunctional resins capable of crosslinking initiated with oxygen and can include alkyd resins, such as alkyd resin that includes one or more telekellic end groups.
公开号:BR112015031284B1
申请号:R112015031284-5
申请日:2014-06-12
公开日:2020-06-23
发明作者:Gerald O. Wilson
申请人:Autonomic Materials, Inc.；
IPC主号:

专利说明:

Technical Field
The present invention relates to self-healing materials, particularly self-healing materials based on unsaturated multifunctional resins capable of crosslinking initiated with oxygen. Background
The failure of polymeric materials can have significant consequences. In the case of coatings, failure of a coating due to a significant traumatic event or mechanical damage due to a more gradual decline as a result of the coating environment can lead to the exposure of the underlying substrate to the environment. Once exposed, a substrate can degrade through corrosion in the case of metal substrates or through other decomposition reactions in the case of non-metal substrates. The failure of coatings, polymerized resins, adhesives, sealants and composites may require expensive repairs and the removal of parts, equipment or installations comprised of these materials. In addition to the costly maintenance associated with material failure, increasingly expensive starting materials from oil stocks, as well as the need to minimize environmental impact, all benefit from the use of longer-lasting materials. Materials that can be repaired when they are damaged will last longer in their specific applications. Brief Description of Drawings
The modalities will be readily understood by the detailed description below together with the attached drawings. The modalities are illustrated by way of example and not by way of limitation in the figures in the attached drawings.
Figure 1 illustrates the chemical synthesis of an alkyd resin of linoleic acid and phthalic anhydride, according to several modalities;
Figures 2A-2C depict a schematic diagram illustrating self-healing by crosslinking unsaturated functional groups from an alkyd resin, including the microencapsulated curing agent formulation (Figure 2A), the release of the resin at the damage site (Figure 2B ) and the crosslinking of the resin at the damage site (Figure 2C), according to several modalities;
Figure 3 is a schematic diagram that illustrates a capsule system, according to several modalities;
Figure 4 illustrates the chemical structure of an example of a representative resin used in various coating performance tests, according to various modalities;
Figures 5A-5C illustrating the self-healing performance observed in a polyurea coating, in which figure 5A shows the results of a test with a control sample, which was a non-pigmented polyurea coating, Figure 5B illustrates the results of a test with a self-healing sample, which contained 20% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups (microcapsule additives are referred to here as Series 3 (S3)) and the figure 5C is a graph that illustrates the degree of corrosion creep observed with two different sizes of scribes, according to various modalities;
Figures 6A-6E illustrate the self-healing performance in a polyethylene powder coating, where the self-healing of scribes with 3 different widths (46 microns, 186 microns and 500 microns) was evaluated and in which Figure 6A illustrates the results of a test with a control sample, figure 6B illustrates the results of a test with a sample containing 20% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups, figure 6C is a graph illustrating the degree of corrosion creep observed with a 46 micron scribe, Figure 6D is a graph illustrating the degree of corrosion creep observed with a 186 micron scribe, and Figure 6E is a graph illustrating the observed corrosion creep with a 500 micron scribe, according to various modalities;
Figures 7A-7C depict a schematic diagram illustrating self-healing by crosslinking unsaturated functional groups from an alkyd resin, including the microencapsulated curing agent formulation (Figure 7A), the release of the resin at the damage site (Figure 7B) and the crosslinking of the resin at the damage site, as well as the formation of covalent bonds, non-covalent bonds, or both covalent and non-covalent bonds with the matrix (Figure 7C), according to several modalities;
Figures 8A-8C illustrate the self-curing performance of two versions of an epoxy coating applied to CRS panels, where figure 8A illustrates a control sample, which was coated with a commercially available epoxy primer, figure 8B illustrates a self-healing sample, which was coated with the same commercially available epoxy initiator, to which 5% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups had been added and figure 8C is a graph illustrating the degree of fluency by corrosion observed with two different sizes of scribes, according to various modalities;
Figure 9 is a schematic diagram illustrating an example of a standard two-capsule system, according to various modalities and;
Figure 10 illustrates a schematic diagram illustrating an example of a hybrid two-capsule system, according to various modalities. Detailed Description of Modalities of the Invention
In the detailed description below, reference is made to the attached drawings that form part of them and in which modalities that can be practiced are shown by way of illustration. It must be understood that other modalities can be used and structural or logical changes can be made without departing from the scope. Therefore, the following detailed description should not be considered in a limiting sense and the scope of modalities is defined by the attached claims and their equivalents.
Several operations can be described as multiple discrete operations, in turn, in a way that can be useful in understanding the modalities; however, the order of description should not be interpreted as implying that these operations are order-dependent.
The description can use perspective-based descriptions such as up / down, backward / forward and top / bottom. Such descriptions are merely used to facilitate discussion and are not intended to restrict the application of the described modalities.
The terms "coupled" and "connected" with their derivatives can be used. It should be understood that these terms are not meant to be synonymous with each other. Preferably, in particular modalities, "connected" can be used to indicate that two or more elements are in direct physical or electrical contact with each other. "Coupled" can mean that two or more elements are in direct physical or electrical contact. However, "coupled" can also mean that two or more elements are not in direct contact with each other, but still cooperate or interact with each other.
For the purposes of the description, an expression in the form "A / B" or in the form "A and / or B" means (A), (B), or (A and B). For the purposes of the description, an expression in the form "at least one of A, B, and C" means (A), (B), (C), (A and B), (A and C), (B and C) or (A, B and C). For the purposes of the description, an expression in the form "(A) B" means (B) or (AB), that is, A is an optional element.
The description can use the terms "modality" or "modalities" which can each refer to one or more of the same or different modalities.
In addition, the terms "comprising" "including", "having" and the like, as used in connection with the modalities, are synonymous.
Described here in various modalities are self-healing materials, which are intelligent materials that are capable of repairing themselves without any external intervention when they are damaged. In various embodiments, some or all of the self-healing materials can be microencapsulated and damage to a matrix containing the microcapsules can disrupt the microcapsules and cause the healing materials to be released at the damage site, where they can polymerize and restore functional capabilities. of the matrix. As used herein, the term "matrix" refers to any material that includes a plurality of microcapsules.
Figure 1 illustrates the chemical synthesis of an alkyd resin of linoleic acid and phthalic anhydride. In various embodiments, alkyd resins such as the illustrated resin can be used as a self-curing agent in a self-curing polymer system. More specifically, several self-healing systems can take advantage of the ability of unsaturated functional groups, such as those present in fatty acids (marked "A" in figure 1), to crosslink in the presence of oxygen. For example, a trifunctional alcohol (marked "C" in Figure 1), such as glycerol, can undergo an esterification reaction with an acid which, in turn, contains a functionality, such as the anhydride functionality (marked "B" "in Figure 1), which is capable of polymerization to form a resin. In various embodiments, this can create a bifunctional resin that can be encapsulated in a curing agent formulation for delivery to a damage site during a curing event. Once released at the damage site, unsaturated functional groups ("A") can crosslink in the presence of oxygen to yield a polymer that cures the damage. Some modalities of the self-healing materials described can be configured as a one-capsule system, while other modalities can take the form of a two-capsule system.
In embodiments that take the form of a capsule system, a curing material comprising a resin, such as an alkyd resin, can be formulated as illustrated in Figure 1, in which both a non-polar solvent and a polar solvent can be formulated. encapsulated together in a microcapsule. In these embodiments, the polar solvent may have a range of properties that makes it possible to encapsulate and stabilize the resin to prevent premature resin crosslinking. When the microcapsule is broken during a curing event, it can then release the curing agent at the damage site where the solvents (both polar and non-polar) evaporate, allowing the crosslinking to begin by absorbing oxygen from the environment. This process is illustrated schematically in figures 2A-2C, which describe self-healing by crosslinking unsaturated functional groups from an alkyd resin, including the microencapsulated curing agent formulation (Figure 2A), the release of the resin at the damage site (Figure 2B) and the crosslinking of the resin at the damage site (Figure 2C).
Although non-polar solvents can be common solvents such as xylene ethyl benzene or acetates with low polarity, polar solvents generally have a set of properties that allow microencapsulation and stabilization of the resin. For example, in some embodiments, the polar solvent can maintain a polar environment within the capsules, thereby preventing premature crosslinking of the resin (for example, due to antioxidation). The solvent may also have a dielectric constant of> 5.0 and may have a boiling point high enough to maintain high thermal stability for the system as a whole, for example,> 225 ° C in various embodiments. In addition, the polar solvent may have a vapor pressure low enough to prevent premature evaporation, which could compromise the polar environment and potentially lead to premature crosslinking of the resin in the curing formulation. In some embodiments, a vapor pressure of <0.5 mmHg (66.66 Pa) at 20 ° C is also desirable. In several embodiments, the polar solvent is also insoluble in water for easy incorporation into a hydrophobic curing agent and encapsulation formulation and generally the polar solvent also has low toxicity, with LD 50 values (oral, rat)> 3000 mg / kg. Specific, non-limiting examples of solvents that meet these criteria include, but are not limited to ethyl phenyl acetate (CAS No.: 101 -97-3), phenyl ethyl acetate (CAS No.: 103-45-7) and phenyl ethyl phenyl acetate (CAS No. 102-20-5).
In various embodiments, the characteristics of the polar aprotic solvent can be selected in order to achieve the desired kinetics for the self-curing process. As described above, in some embodiments, the characteristics of the polar aprotic solvent can be optimized to prevent premature crosslinking of the curing agent that would make it unavailable during a curing event. However, in other embodiments, the formulation can be customized to increase or decrease the reaction rate of the curing agent as desired. For example, since the reaction of the curing agent depends on the crosslinking of unsaturated groups, which will not readily occur in the presence of the polar aprotic solvent, in some embodiments, the concentration of the polar aprotic solvent in the curing agent formulation can be adjusted to tune the healing kinetics of a self-healing system.
Table 1 below shows an example of the effect of decreasing the concentration of a polar aprotic solvent (ethyl phenyl acetate, in this case) on the freezing and curing times of the curing agent formulation. The data shows that decreasing the concentration of ethyl phenyl acetate and replacing it with a solvent with low polarity, such as hexyl acetate, results in faster freezing and curing times. In addition to confirming the effectiveness of a polar aprotic solvent in delaying premature polymerization of the curing agent, these data demonstrate that by releasing the microcapsules, the replacement of an increasing amount of the polar aprotic solvent by solvents with lower polarities and higher pressure of steam can lead to self-healing systems with faster curing kinetics. In various modalities, the ideal cure rate required may differ from one application to the next. However, that ideal rate can be achieved in several modalities by varying the concentration of the polar aprotic solvent in the formulation.Table 1. Freezing and curing times depending on the concentration of polar aprotic solvent in a curing agent formulation.

The solvent used in this example was ethyl phenyl acetate and in formulations in which its concentration was decreased, hexyl acetate was used instead. To stimulate solvent evaporation during a curing event, 5 drops of the curing agent formulation being evaluated were applied to the center of a 3 inch by 5 inch cold rolled steel panel and evaluated periodically.
Figure 3 is a schematic diagram illustrating a capsule system, according to several modalities. If the application is a coating, sealant, adhesive, thermosetting composite, thermoplastic composite or some other polymeric matrix material, microcapsules can be incorporated into the material prior to use in the specific application.
An example of using a capsule system in liquid coatings is the use of microcapsules containing an epoxy functionalized alkyd where the oligomers contain telekelic epoxy functional groups, such as the one shown in Figure 4, which illustrates the chemical structure of an example of a representative resin used in the coating performance tests, according to several modalities. According to various modalities, the crosslinking of the unsaturated groups in the fatty acid chain (see, for example, groups A, Figure 1) leads to the formation of a cured polymer that restores the barrier property of the coating.
Figures 5A-5C illustrate the self-healing performance observed in a polyurea coating. Figure 5A illustrates the results of a test with a control sample, which was a non-pigmented polyurea coating, Figure 5B illustrates the results of a test with a self-healing sample, which contained 20% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups (microcapsule additives are referred to as Series 3 (S3)) and Figure 5C is a graph illustrating the degree of corrosion creep observed with two different scribe sizes, from according to various modalities. For the example illustrated in Figure 5, as well as the remaining examples described below, the microcapsules were mixed in the coating formulation prior to application on the substrate. The coating samples were prepared by lowering the coating on the desired substrate using a lowering bar, although similar results have been observed using airless and conventional spray equipment. After applying the coating, the sample was allowed to cure for 24 hours, after which it was intentionally damaged using scribe tools with 186 and 500 microns, respectively.
The samples were then allowed to cure at room temperature for 24 hours and then placed in a salt spray, in which they were exposed to conditions specified by ASTM B117 for 1000 hours (ASTM B standard, 2003, "Standard Practice for Operating Salt Spray (Fog) Apparatus, "ASTM International, West Conshohocken, PA, www.astm.org). After exposure to salt spray, the amount of corrosion creep from the scribe was measured in mm.
Figures 5A and 5B show two versions of a non-pigmented polyurea coating applied to cold rolled steel (CRS) substrates. The control sample (Figure 5A) was coated with the standard non-pigmented coating, while the self-healing sample (Figure 5B) contained 20% by weight of microcapsules containing a formulation comprised of an alkyd resin such as that shown in Figure 4 and a polar solvent that meets the criteria described above such as ethyl phenyl acetate. As shown in Figure 5C, after exposure to ASTM B117, the control sample exhibited significant visible scribe corrosion creep, while self-healing exhibited minimal scribe corrosion creep (in the case of 500 micron scribe damage) to practically none. (in the case of 186 micron scribe damage). Similar results have also been observed for a range of coating and matrix chemicals including epoxies, polyurethanes, alkyds, epoxy vinyl esters, silicones and other liquid coating chemicals.
Figures 6A-6E illustrate the self-healing performance in a polyethylene powder coating, in which the self-healing of scribes with 3 different widths (46 microns, 186 microns and 500 microns) was evaluated; where Figure 6A illustrates the results of a test with a control sample, Figure 6B illustrates the results of a test with a sample containing 20% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups , Figure 6C is a graph that illustrates the degree of corrosion creep observed with a 46 micron scribe, Figure 6D is a graph that illustrates the degree of corrosion creep observed with a 186 micron scribe and Figure 6E is a graph illustrating the degree of corrosion creep observed with a 500 micron scribe, according to various modalities. Unlike liquid coatings that can be patched if damage to an area is observed, powder coatings that are cured when polymeric particles are heated above their melting point, melting and flowing to form a uniform coating are not easily repaired in service with the same type of coating. This is due to the fact that powder coated parts are often cured in large ovens whose use is not feasible in service. When these coatings are used to protect the underlying asset against corrosion, the inability to properly repair them in service when they are damaged is of significant concern.
In the embodiment illustrated in Figures 6A-6E, spray-dried microcapsules were mixed into dry powder coating formulations to form dry mixtures which were then applied to CRS substrates by means of an electrostatic spray gun or a fluidized bed. Although the control sample exhibited significant scribe corrosion creep after exposure to ASTM Bl 17 conditions for 1000 hours (see, for example, Figure 6A), the self-healing samples exhibited minimal scribe corrosion creep (see, for example). example, Figure 6B). As shown in Figures 6C-6E, the control sample exhibited significant visible scribe corrosion creep, while self-healing exhibited minimal scribe corrosion creep (in the case of 500 micron scribe damage, Figure 6E) to virtually none (at in the case of 186 micron and 46 micron scribe damage, Figures 6C and 6D). Similar results have also been demonstrated for other powder coatings, including epoxies and polyesters.
In several modalities, the adhesion of the matrix can be improved by combining the functional group. Specifically, the self-healing performance can be improved and, thus, the concentration of the microencapsulated self-healing additive can be decreased by taking advantage of telekeletic groups in a resin. In some embodiments, the combination of the functional group can be used with an alkyd resin with epoxy telekelic functional groups as illustrated in Figure 4. For example, when a self-healing material is formulated as described above and a resin such as that shown in Figure 4 is released at the damage site during a curing event, the epoxy group will crosslink with residual epoxy groups and epoxy curing agents present in the matrix. The result is a polymerized curing agent that is covalently attached to the matrix in addition to other non-covalent interactions that may be present (see, for example, Figure 6). This improved adhesion to the matrix can lead to the self-healing performance at lower concentrations of the curing agent. Although the embodiment illustrated in Figure 4 uses an alkyd resin with epoxy telekelic functional groups, other modalities can use an alkyd resin that includes telekelic end groups that can crosslink with other complementary residual reactive groups such as isocyanates, polyols, silanes terminated in vinyl, vinyl and other unsaturated groups.
An example of the result of the improved adhesion to the matrix is shown in a comparison between a fully formulated epoxy coating (control) and a similar epoxy coating containing 5% by weight of microcapsules containing a formulation comprised of an alkyd resin, such as that shown in Figure 4 is a polar solvent that meets the criteria described above, such as ethyl phenyl acetate. Figures 7A-7C depict a schematic diagram illustrating improved matrix adhesion with a self-cure by crosslinking unsaturated functional groups from an alkyd resin, including the microencapsulated curing agent formulation (Figure 7A), the release of a resin at the damage site (Figure 7B) and the crosslinking of a resin at the damage site, as well as the formation of covalent bonds, non-covalent bonds, or both covalent and non-covalent bonds with the matrix (Figure 7C), according to several modalities;
Figures 8A-8C illustrate the self-curing performance of two versions of an epoxy coating applied to CRS panels, where Figure 8A illustrates a control sample, which was coated with a commercially available epoxy primer, Figure 8B illustrates a sample of self-cure, which was coated with the same commercially available epoxy initiator, to which 5% by weight of microcapsules containing ethyl phenyl acetate and an alkyd resin with epoxy end groups had been added and Figure 8C is a graph illustrating the degree of corrosion fluency observed with two different sizes of scribes, according to various modalities. As shown in Figure 8C, although corrosion creep from the initial 186 and 500 micron scribes is significant for control samples after exposure to conditions specified by ASTM B117, corrosion from similar scribes in the self-healing sample is limited.
Similar self-healing systems can be used in which the telehelic groups of a multifunctional resin (for example, groups B in Figure 4) are functional groups, such as isocyanates or polyols for crosslinking with polyurethane, silanol or vinyl-terminated silanes for crosslinking with silicone based matrices, vinyl groups for crosslinking with vinyl esters etc. Various unsaturated fatty acids (eg, palmitoleic acid, oleic acid, docosahexaenoic acid) and other unsaturated functional groups (eg groups A in Figure 4) can be used in the design of self-healing systems based on this concept. The nuclear tri-functional alcohol on which a resin or multifunctional monomer is based can be any tri-functional alcohol such as glycerol, a tri-functional silanol or any other tri-functional alcohol which may include other functional groups such as fluorinated functional groups or other reactive functional groups such as epoxy groups , vinyl or isocyanate as additional points for crosslinking.
Other modalities involve a system of two capsules. In various embodiments, the healing kinetics of a self-healing system can be improved by improving the reaction kinetics of the base resin component of the self-healing system. In the case of multifunctional resins that form the basis of this self-healing system, the reaction kinetics can be improved by improving the crosslinking rate of unsaturated functional groups (marked with "A," in Figure 4). In many ways, this approach can be considered the basis of a standard two-capsule system. Figure 9 is a schematic diagram illustrating an example of a standard two-capsule system, according to various modalities. In various embodiments, two varieties of microcapsules can be incorporated into the matrix. The first variety of microcapsules can contain a curing agent formulated as described above for a capsule system (Capsule A, Figure 9).
The second variety of microcapsules can contain a catalyst, typically a salt or metal complex, which is commonly referred to as a dryer when the redine or monomer is an alkyl (Capsule B, Figure 9). Examples of metal complexes that can be used, either alone or in combination with others, include primary dryers based on cobalt, manganese, iron, cerium and vanadium. These dryers can be used in combination with secondary dryers based on zirconium, bismuth, barium and aluminum complexes and / or auxiliary dryers based on calcium, zinc, lithium and potassium complexes, to name a few examples. For the easy mixing of curing agents released at the damage site, in various modalities, the non-polar solvent in the capsule containing a resin (Capsule A) can be used as the medium for the distribution of the catalyst (Capsule B).
An alternative approach to the design of a two-capsule system is based on a capsule B formulation that includes a curing agent for the telekeletic group (marked "B" in Figure 4) in addition to a catalyst for crosslinking the groups unsaturated (marked with "A" in Figure 4). Figure 10 illustrates a schematic diagram illustrating an example of such a hybrid two-capsule system, according to various modalities. Just as the use of capsule B in the system of two standard capsules improves the rate and degree of crosslinking of unsaturated groups (groups A), the inclusion of a curing agent for the telekeletic group improves the conversion efficiency of these groups and thus the crosslinking with the matrix.
The self-healing concept described here depends on the ability to microencapsulate the formulation of curing agents in microcapsules comprised of polymeric shell walls. In various embodiments, the various wrapping walls can be used for the compartmentalization of curing agents including urea-formaldehyde, polyurethane and combinations of the two. The resulting microcapsules can be incorporated into a formulation in a wet final form (such as a slurry or wet cake), which can contain moisture by 15% by weight and greater, or in a dry final form, which typically contains 2% moisture in weight or less. All microcapsules can be produced in a range of 1 micron or greater, but in various modalities, size scales for the applications discussed above can be between 5 and 100 microns. In various embodiments, self-healing materials based on the present system can be comprised of microcapsules in concentrations as low as 1% by weight and as high as 20% by weight. Although certain modalities have been illustrated and described here, it will be appreciated by those skilled in the art that a wide variety of alternative and / or equivalent modalities or implementations calculated to achieve the same purposes can be replaced by the modalities shown and described without departing from the scope. Those skilled in the art will readily appreciate that the modalities can be implemented in a very wide variety of ways. This application is intended to cover any adaptations or variations in the modalities discussed here. Therefore, it is manifestly intended that the modalities are limited only by the claims and their equivalents.

权利要求:
Claims (27)
[0001]
Polymeric self-healing material, characterized by comprising:
a first microcapsule and;
an unsaturated multifunctional resin capable of oxygen-initiated crosslinking, in which an unsaturated multifunctional resin is disposed within the first microcapsule; and
a polar aprotic solvent insoluble in water with a melting point greater than or equal to 225 ° C and a dielectric constant greater than or equal to 5.0, in which the unsaturated multifunctional resin and the polar aprotic solvent are disposed within the first capsule.
[0002]
Polymeric self-curing material according to claim 1, characterized by the fact that an unsaturated multifunctional resin comprises an alkyd resin.
[0003]
Self-healing material according to claim 2, characterized in that an alkyd resin is formed from a fatty acid, a trifunctional alcohol and an acid or an acid anhydride.
[0004]
Polymeric self-curing material according to claim 3, characterized in that the trifunctional alcohol comprises glycerol, a trifunctional silanol or a trifunctional alcohol comprising a fluorinated functional group, epoxy, vinyl or isocyanate.
[0005]
Polymeric self-curing material according to claim 2, characterized in that an alkyd resin comprises a telekellic end group.
[0006]
Self-curing polymeric material according to claim 5, characterized by the fact that the tele-end group comprises an epoxy group, an isocyanate, a polyol, a silanol, a vinyl-terminated silane, a vinyl, an unsaturated fatty acid or an unsaturated functional group.
[0007]
Polymeric self-curing material according to claim 5, characterized by the fact that it further comprises a non-polar solvent having a dielectric constant less than 5.0, disposed within the first microcapsule.
[0008]
Polymeric self-curing material according to claim 7, characterized by the fact that the non-polar solvent comprises xylene, ethyl benzene or a low polarity acetate having a dielectric constant less than
[0009]
Polymeric self-curing material according to claim 7, characterized by the fact that the solvent
a) maintains a polar environment within the microcapsule;
b) has a vapor pressure of <0.5 mmHg (66.66 Pa) at
c) has an LD 50 value (oral, rat)> 3000 mg / kg
d) a combination of any of ad.
[0010]
Polymeric self-curing material according to claim 7, characterized in that the polar aprotic solvent comprises ethyl phenyl acetate, phenyl ethyl acetate, or phenyl ethyl phenyl acetate.
[0011]
Polymeric self-curing material according to claim 1, characterized in that it further comprises a second microcapsule, wherein the second microcapsule comprises a catalyst or curing agent.
[0012]
Self-curing polymeric material according to claim 11, characterized by the fact that the catalyst comprises complexes of cobalt, manganese, iron, cerium, vanadium, zirconium, bismuth, barium, aluminum, calcium, zinc, lithium or potassium.
[0013]
Polymeric self-healing material according to claim 1, characterized by the fact that the microcapsule comprises urea-formaldehyde, polyurethane, melamine-formaldehyde, polyacrylate or a combination of
[0014]
Polymeric self-healing material, according to claim 1, characterized by the fact that the microcapsule has an average diameter between 0.5 microns and 100 microns. microns.
[0015]
Polymeric self-curing material according to claim 1, characterized in that the polymeric self-curing material is a component of a coating, a resin, an adhesive, a thermosetting composite, a thermoplastic composite, or a sealant.
[0016]
Self-curing polymeric material according to claim 15, characterized in that the coating comprises a polyurea coating, a polyethylene coating, an epoxy coating, a polyurethane coating, an epoxy vinyl ester coating, an acrylic coating , an alkyl coating or a silicone coating.
[0017]
Polymeric self-curing material according to claim 16, characterized in that the coating comprises a powder coating.
[0018]
Self-curing polymeric material according to claim 16, characterized in that the coating is applied by a lowering bar application technique, a conventional spray application technique or airless spray application technique.
[0019]
Method of creating a polymeric self-healing material, characterized by the fact that it comprises:
provision of an unsaturated multifunctional resin capable of crosslinking initiated with oxygen and a polar aprotic solvent insoluble in water and with a melting point greater than or equal to 225ºC and a dielectric constant greater than or equal to 5.0; and
microencapsulation of the unsaturated multifunctional resin and the aprotic polar solvent together, thereby creating the self-healing polymeric material.
[0020]
Method according to claim 19, characterized in that the provision of the unsaturated multifunctional resin comprises the provision of an alkyd resin.
[0021]
Method according to claim 20, characterized in that the provision of the alkyd resin comprises the provision of an alkyd resin formed of a fatty acid, a trifunctional alcohol and an acid or acid anhydride.
[0022]
Method according to claim 20, characterized in that the provision of the alkyd resin comprises the provision of an alkyd resin comprising a telekelic end group.
[0023]
Method according to claim 22, characterized in that the provision of the alkyd resin comprises the provision of an alkyd resin comprising a telekelic end group comprising an epoxy group, an isocyanate, a polyol, a silanol, a silane finished in vinyl, a vinyl, an unsaturated fatty acid or an unsaturated functional group.
[0024]
Method according to claim 20, characterized in that the method further comprises the provision of a separately encapsulated catalyst or curing agent.
[0025]
Method, according to claim 19, characterized by the fact that the method further comprises:
provision of a non-polar solvent having a dielectric constant less than 5.0; and
microencapsulation of the non-polar solvent together with the unsaturated multifunctional resin and the polar aprotic solvent.
[0026]
Method according to claim 25, characterized in that the increase in a concentration of the microencapsulated polar aprotic solvent reduces the premature crosslinking initiated with oxygen from the unsaturated multifunctional resin and in which the decrease in the concentration of the microencapsulated polar aprotic solvent reduces a time curing of unsaturated multifunctional resin.
[0027]
Method according to claim 19, characterized in that the method further comprises the addition of the microencapsulated unsaturated multifunctional resin to a coating, a polymerized resin, an adhesive, a thermosetting composite, a thermoplastic composite or a sealant.

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同族专利:

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公开号 | 公开日

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US9296895B2|2016-03-29|

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EP3007728A4|2017-02-01|

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EP3007728A1|2016-04-20|

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BR112015031284A2|2017-07-25|

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JP6566937B2|2019-08-28|

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WO2014201290A1|2014-12-18|

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法律状态:
2018-01-23| B07D| Technical examination (opinion) related to article 229 of industrial property law|

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2018-02-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-03-26| B07G| Grant request does not fulfill article 229-c lpi (prior consent of anvisa)|Free format text: NOTIFICACAO DE DEVOLUCAO DO PEDIDO POR NAO SE ENQUADRAR NO ART. 229-C DA LPI. |

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2019-08-20| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-05-12| B09A| Decision: intention to grant|

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2020-06-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/06/2014, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US201361834733P| true| 2013-06-13|2013-06-13|

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US61/834,733|2013-06-13|

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PCT/US2014/042184|WO2014201290A1|2013-06-13|2014-06-12|Self-healing polymeric materials via unsaturated polyesters|

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