• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:

    公开号:AT510134A1
    申请号:T0099611
    申请日:2011-07-07
    公开日:2012-01-15
    发明作者:
    申请人:Schneller Llc；
    IPC主号:
    专利说明:

    TITLE OF THE INVENTION
    SOLVENT-CASTED FLAME-REDUCING POLYCARBONATE COATINGS, FILMS AND LAMINATES
    US PATENT APPLICATION
    FASTER, LLC RELATED APPLICATIONS
    This application claims the benefit of US Provisional Patent Application Serial No. 61 / 362,330, filed on Jul. 8, 2010, which is hereby incorporated by reference in its entirety.
    FIELD OF THE INVENTION
    The present invention relates to solvent cast, flame retardant, and polycarbonate based films. In addition, it relates to the solvent-cast films comprehensive makes. Solvent-cast films of the present invention are particularly useful in the design and manufacture of laminates for use in buildings and mass transit vehicles, such as e.g. decorative laminates for railway or commercial aviation applications.
    BACKGROUND OF THE INVENTION
    Economical fuel economy is becoming increasingly important in all transportation sectors, increasing the need for lighter structures that are associated with difficulties in maintaining or even improving the strength and structural integrity of previous designs. The weight
    REDUCED -1 - reduction is particularly important in mass transit vehicles such as trains and commercial aircraft. In order to maintain, support and improve the strength of lightweight panels for aircraft floor and sidewalls, it is advantageous or even necessary that all components of the assembly contribute to the structural integrity of the final construction. While decorative components in interior cabins of aircraft, such as e.g. decorative laminates, which have heretofore typically met exclusively or predominantly aesthetic purpose, it is increasingly important that they are constructed to support or enhance the strength and durability of the panels and surfaces they cover. The ability of the decorative laminate to increase strength and durability must be achieved while strictly complying with flame retardancy requirements for heat release, smoke generation, and potentially harmful product release from combustion.
    The need for increased durability of lightweight decorative laminates, increased strength, and excellent flame retardancy requires the use of new materials, such as engineering thermoplastics, which have not hitherto been used for these applications. In addition, these materials must be used as thin coatings or films having a thickness of 0.002 inches or less and a sufficient width, e.g. 5 feet or more, available to make laminates for coating large panels. These dimensions are determined by conventional packaging methods, e.g. the extrusion technology, not easy to achieve. Furthermore, the extrusion of many engineering thermoplastics precludes the use of some useful flame retardants, such as of aluminum oxide trihydrate (ATH), which decomposes at high temperatures necessary for extruding many engineering thermoplastics.
    Another disadvantage in the production of thin polymer films by extrusion is the polymer chain alignment in the resulting film. This can produce film properties with greater anisotropy dependency. The alignment is usually accompanied by residual stresses in the material, which can lead to changes in size [of subsequent degradation of stress relaxation] if the film material heats up again to its softening point in subsequent processing steps becomes.
    Polycarbonate materials are particularly problematic in that they are only soluble in a limited number of solvents. Low molecular weight chlorinated solvents, e.g. Methylene chloride were used to dissolve polycarbonate resins. However, it is believed that methylene chloride is a carcinogen and involves the problem of low boiling point (41 ° C). Tetrahydrofuran is also an effective solvent for polycarbonate resins, but also has a low boiling point (65-67 ° C) and gives low stability solutions at higher concentrations and is expensive. 1,3-Dioxolane is a known suitable solvent for dissolving and casting polycarbonate films. It is particularly preferred because of its higher boiling point of 76 ° C, similar to methyl ethyl ketone, a solvent commonly used in solvent casting operations. High optical quality films of pure polycarbonate polymers cast from solutions of 1,3-dioxolane with or without an extender are described in U.S. Patent 5,478,518 and U.S. Patent No. 5,561,180. The prior art relates primarily to films for optical applications and does not address the casting of formulated polycarbonate resin systems for specific properties such as flame retardancy and strength.
    SUMMARY OF THE INVENTION
    The present disclosure and related inventions overcome numerous difficulties and limitations in the extrusion of flame retardant engineering thermoplastic films, such as e.g. polycarbonate-based flame retardant resins by casting thin films from a solvent. Solvent cast films or coatings according to the present invention retain the flame retardant properties and mechanical properties of the resinous films.
    SUBSEQUENT I -3-
    Compound from which they were hewn, and exhibit comparable performance as an extruded film of the same resinous compound.
    The present disclosure and related inventions provide thin, flame retardant polycarbonate based films made by a solvent casting process. In addition, it relates to the solvent-cast films comprehensive makes. Solvent-cast films of the present invention are particularly useful in the design and manufacture of laminates for use in the transportation industry, e.g. decorative laminates for railway or commercial aviation applications, where there are stringent requirements for flame retardant properties, e.g. low smoke and heat generation, there. Articles made according to the invention have particularly good flame retardant properties, e.g. low heat and smoke, on. While the flame retardant and mechanical properties of the resin composition are maintained, the solvent casting process offers some processing benefits. The lower temperatures required to dissolve the resin and remove the solvent enable the use of flame retardant additives that are unstable at the higher extrusion temperatures of most engineering thermoplastic resins. A commonly used flame retardant, alumina trihydrate (ATH), decomposes at 200 ° C, while the extrusion temperatures of polycarbonate resins may be above 230 ° C or more. The solvent casting processes allow the incorporation of ATGH into the film or coating to improve the flame retardant properties of a particular resin.
    The solvent casting process allows for the production of very thin 0.0005 inch or less coatings because the resin dispersion can be cast directly onto a substrate or support film or on paper coated with a suitable release liner. Coatings can be made in a thickness that would normally be too thin to handle and tend to tear or break. The poured on a release layer or a paper
    I NAnHttPRFinWT I -4-
    Coating may then be applied to another substrate, e.g. another polymer film or polymer film, are transferred and laminated to produce the final laminate structure.
    Depending on the substrate to be coated, the solvent-grafted layer may be applied directly to a substrate to be coated. The only limitation with respect to the solvent casting method is that the substrate must have sufficient resistance to the solvent to be used for dispersing the resin compound. For example, the solvent casting method allows porous substrates, such as e.g. Paper or woven or nonwoven fabrics or mats, coated and impregnated, fiber materials suitable for use in fabrics or mats for coating and impregnation include, but are not limited to, glass, carbon, basalt and aramid, including a combination of two or more materials. Impregnated materials can be consolidated under sufficient heat and pressure to produce composite panels that can be used in construction applications or anti-bounce panels.
    Another advantage of the solvent casting method is the ease of pigmentation of the coating or film to provide certain aesthetic features for use as a decorative color coat or surface layer. Even if the thin coating or thin film is used as an intermediate or carrier layer in a multi-layered laminate, it may be desirable to produce a film having the same color as the surface layer, such as holes, cuts, scratches in the surface layers of a laminate are less visible.
    The present invention overcomes these difficulties and limitations of film extrusion through the use of a solvent casting method to first thin polycarbonate-based films of flame retardant resin compounds, which film retains the good flame retardant and mechanical properties of the original resin composition. REPLACED) -5-
    Another object of the present invention is to provide a thin, flame retardant polycarbonate-based film using a solvent casting method while retaining the unique flame retardant and physical properties of the base resin compound. Another object of the invention is to produce articles comprising these solvent-cast, thin, flame retardant polycarbonate-based films by lamination techniques. Solvent cast films of the invention are particularly useful in the design and manufacture of laminates for use in buildings and mass transit vehicles, such as e.g. decorative laminates for railway or commercial aviation applications.
    DETAILED DESCRIPTION OF THE INVENTION
    Resins suitable for use in a solvent casting process include any of the following flame retardant resin classes: polycarbonate homopolymers, copolymers (eg polycarbonate / siloxane), terpolymers, polymer alloys or polymer blends, and can be impact modified or unmodified be. The class is preferably selected to meet the flame retardant properties of the end use application. Suitable classes are marketed under the trade names Lexan (Sabic Innovative Plastics), Makroion (Bayer) or Panlite (Teijin). The resin may also be a flame retardant polycarbonate-acrylonitrile-butadiene-styrene (ABS) polymer alloy marketed under the trade names Cycoloy (Sabic Innovative Plastics), Bayblend (Bayer) or Multiron (Teijin). A particularly preferred class of solvent cast films is Lexan FST9705 (Sabic Innovative Plastics) flame retardant polycarbonate terpolymer resin.
    The polycarbonate resin can be used alone or in combination with one or more other polymer resins to form a polymer blend for modifying the mechanical properties or achieving better performance of the polymer
    POST-REPLACE solvent-cast film or oil coating in the target application. For example, a polymer blend can be selected which improves the tensile strength or tensile elongation, impact resistance and flame retardancy of the cast film, or which enhances flame retardancy or moldability in a decorative laminate containing the solvent-cast film or coating. The polymer resin or resins must be soluble in the same solvent or solvent mixture used to dissolve the polycarbonate-based resin. Polymers suitable for use in admixture with the polycarbonate-based resin include, but are not limited to, acrylic polymers or copolymers, thermoplastic polyurethanes and polyvinyl chloride polymers or copolymers. When a non-polycarbonate based polymer is included in a blend, it is typically used in an amount of less than 50%, preferably less than 40%, more preferably less than 30% of the total weight of the polymer resins.
    A preferred solvent for use in dissolving and dispersing the above resin compounds is 1,3-dioxolane, either alone or with an extender agent. The type and content of the extender are chosen to prevent premature skin formation on the coating surface during the solvent removal process. The cosolvent must be miscible with the 1,3-dioxolane and will not cause precipitation or flocculation of the resin compound from the 1,3-dioxolane. In order to minimize skin formation and to increase the coating quality, the co-solvent preferably has a higher boiling point than the 1,3-dioxolane solvent, but a co-solvent with too high a boiling point makes complete removal of the solvent difficult. The co-solvent preferably has a boiling point between 100 and 200 ° C, more preferably between about 120 and 180 ° C, and especially between about 140 and 160 ° C.
    Preferred co-solvents include, but are not limited to, toluene, PM acetate, and glyme, including, but not limited to, monoglyme, diglyme, and ethyl glyme. Certain solvents must be avoided because they are
    POSSIBLE -7- adversely affect film properties, e.g. lead to increased brittleness. Ketones, e.g. Cyciohexanone, for example, are detrimental to the film properties.
    It should be noted that many of the above resins, e.g. mixed resin products, consisting of one or more Polymermateriaiien or phases that dissolve in the 1,3-dioxo! on solvent or in the solvent mixture, but also solid particles such. impact modifiers, mineral fillers and other additives, which may not dissolve but are present after dissolution of the polymer material in the dispersed phase. The polycarbonate-based flame retardant resin is dissolved in 1,3-dioxolane at a concentration of> 20% of the resin solids, more preferably> 25% of the resin solids, and more preferably> 30% of the solids. The upper limit for the solids content of the dispersion is generally determined by the viscosity of the solvent dispersion, which must be suitable for the chosen coating process. A suitable roll coating viscosity is, for example, between 2500 to 15,000 cps, more preferably between 5,000 and 10,000 cps. A solution of Lexan FST9705 having a solids content of 27.5% in 1,3-dioxolane had a viscosity of 6600 cP, a viscosity suitable for reverse wipe coating and many other coating processes.
    Methods of applying a film of the polycarbonate resin dispersion may include, but are not limited to: gravure, reverse roll, squeegee, air knife, wire wound squeegee ("Meyer" squeegee), slot die, dip or slot die ("extrusion coated"). The coating process, and thus the total viscosity of the dispersion, is chosen according to the desired application. For example, dip coating is used to coat a porous substrate such as paper or glass, if some degree of penetration or impregnation of the coating substrate is desired. Gravure coating may be preferred for making extremely thin films or coatings. Suitable viscosities for reverse roll coating are between 2500 to 15,000 cps, more preferably between 5,000 and 10,000 cps. A solution of Lexan FST9705 with a solids content later! -8- 4 * »* * * * * * * * * * * * of 27.5% in 1,3-dioxolane wiWine 'viscosity of * ^ 600 cP, a viscosity suitable for reverse roll coating and many other coating methods.
    The present invention also relates to articles comprising the above-described solvent-cast thin films or coatings. Thin films or coatings according to the invention may be incorporated into articles where strength and flame retardancy are required. Applications include, but are not limited to, laminates, non-textile floor laminates, and thermoplastic composites. Decorative laminates and non-textile floor laminates made with films and coatings according to the invention are particularly well suited for use on the interior surfaces of mass-transport vehicles, e.g. Suitable for commercial aircraft and passenger cars. Composite panels comprising multiple layers of woven or nonwoven fabrics or mats may be used in structural or mobile applications as structural elements or antiballistic protection.
    For decorative laminates, solvent-cast or polycarbonate-based films can be used as a backing, ink layer, or other internal layer in the construction. In the simplest embodiment, the decorative laminate consists of at least two layers, including a clear surface layer; and a colored layer of a solvent cast film according to the present invention. More often, thin films according to the invention are used as a support layer or inner layer of a laminate consisting of three or more layers: (1) a surface layer; (2) a paint layer; (3) a polycarbonate thin film layer according to the invention; (4) optionally, a carrier layer of polyvinyl fluoride, polyvinylidene fluoride, polyvinyl chloride or an acrylic-based polymer. Other layers may be present as needed, for example, tie layers to improve adhesion between the different layers of the laminate or print layers to improve the aesthetic effect of the laminate. The total thickness of the bonding layer and the printing layer preferably make less than 15%, nor
    More preferably, less than 10%, more preferably only 5%, of the total thickness of the laminate. Suitable laminate constructions for use with solvent-cast, polycarbonate-based flame retardant films, methods of preparation, and methods of use are described in commonly assigned US Patent Application Serial No. 12 / 68,401, the disclosure of which is incorporated herein by reference in its entirety.
    In non-textile floor laminates, a glass fiber fabric having a solvent-cast coating of a polycarbonate-based flame retardant resin is used as a reinforcing layer on the underside or inside the laminate. The non-textile floor laminates consist of one or more glass reinforcement layers and one or more polymer surface layers. For example, an upper portion of the composite floor system may consist of a colored base layer under a clear topcoat. Other layers in the composite flooring system include tie layers and optionally decorative print layers. Suitable non-textile floor laminate constructions for using a glass fiber fabric reinforcement layer with a solvent-cast coating of a polycarbonate-based flame retardant resin are described in commonly assigned U.S. Patent Application Serial No. 12 / 716,502 described, the disclosure of which is incorporated herein by reference in its entirety. In a preferred embodiment, the solvent cast coating can be applied to the glass fabric using a dip coating process to achieve some penetration of the resin into the glass fiber fabric. Alternatively, the glass fiber fabric may be coated using the coating methods described above. However, these methods may require that the fiberglass fabric be coated in two separate coating operations on both sides, if necessary.
    A fabric having a solvent-cast coating of a polycarbonate-based flame retardant resin is also an intermediate in the production of thermoplastic composite sheets. Several layers of a coated fabric are stacked on top of each other and at sufficient temperature, sufficient pressure and sufficient time between the hotplates of one....... * * ··Φφφφφφφ i i i i iΦΦΦΦΦΦΦΦΦ und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und und heated press inserted to solidify the layers into a monolithic structure. The resin content of the resulting composite is controlled by the amount of resin applied to the glass, as well as the heat, pressure and duration in the solidification step. The fiber composition, weave type and resin content are chosen based on the desired application of the composite. For antiballistic composites, for example, a glass fiber roving fabric having an S-glass or S2 glass composition having a resin content of about 20% or less is preferable. The anti-ballistic composite can be used alone by defending low speed projectiles, but is typically used as a splinter protection liner behind a metal or ceramic impact surface to fend off high velocity bullets and those with armor piercing capabilities. Carbon fiber or basalt fabrics may also be suitable for anti-ballistic applications. For lightweight applications, the fibers of the composite may consist of a poly-aramid composition.
    If the composite is to perform only a structural function, and if weight reduction provides little or no advantage, then an E-glass composition-based fabric material is preferred, as well as in cases where an overall thicker and heavier board is required ,
    The examples below serve to illustrate various embodiments of the principles and concepts of the disclosure and related inventions, and do not limit the scope of the disclosure or claims in any other way.
    example 1
    About 182g of pigmented Lexan FST9705 resin was dissolved by slow mixing into about 380g of 1,3-dioxolane to produce a solution / dispersion of Lexan FST9705 having a solids content of about 32.5%. The Lexan FST9705 resin
    I SUGGESTED -11 - Ψ fm ~ «··· * *» * I ft »« M · # · J · · # »» «» was placed on release paper between 'iwdi' pafallälen'labor coating scrapers with a net gap of 0.005 inches applied. The solvent was removed at ambient conditions. The dried coating was removed from the release paper, yielding a self-supporting film of nominal 0.002 inch thickness. The film was used to make a decorative laminate consisting of a 0.4 mil clear fluoropolymer surface layer, a 4 mil vinyl flame retardant master, and the solvent cast Lexan FST9705 film as the backing. The laminate was solidified in a laboratory press at 310 ° F and 150 psi for 5 minutes, followed by a cooling cycle. The resulting decorative laminate material had a surface density of 254 g / m2. The laminate showed a tensile strength of 201 N / 25 mm width. The flame retardant properties were measured according to FAR 25.853 Annex F, parts IV and V, with the laminates adhered to a conventional Crush Core phenolic plate (available from Schneller, LLG) using a 2 mil layer of a flame retardant, heat activated adhesive , The material showed a total heat development of 31.5 kW-min / m2 over 2 minutes and a peak heat development rate of 32.0 kW / m2. Fuel smoke measurements showed a maximum smoke density within 4 min (Ds max) of 86.9.
    Example 2
    Lexan FST9705 resin and a thermoplastic polyurethane resin, Estane 5713 (available from Lubrizol) were dissolved in 1,3-dioxolane having a final solids content of about 28%. The ratio Lexanharz: Estanharz was about 4: 1. The dispersion was applied to release paper between two parallel laboratory coating knives with a net gap of 0.005 inches. The solvent was removed at ambient conditions and then at 95 ° C for 10 min. The dried coating was removed from the release paper, yielding a self-supporting film of nominal 0.002 inch thickness. The film was used to make a decorative laminate consisting of a 0.4 mil clear fluoropolymer surface layer, a 4 mil vinyl flame retardant master, and the solvent cast Lexan FST9705 film as the backing. The laminate was press-cured in a laboratory press at 310 ° F and 150 psi for 5 min.......... "" Later "-12- * ·· · · * · · · ψ" m "* The curing properties of the laminate were measured according to FAR 25.853 Annex F, parts IV and V, using a 2-mil layer of a flame-retardant, heat-activatable adhesive on one of the laminates conventional Crush Core phenolic sheet (available from Schneller, LLC). The material showed a total heat development of 41.2 kW-min / m2 over 2 min and a peak heat development rate of 44.4 kW / m2. Fuel smoke measurements showed a maximum smoke density within 4 min (Ds max) of 117.5.
    Example 3
    Lexan FST9705 resin and an acrylic resin, Korad (available from Spartech) were dissolved in 1,3-dioxolane having a final solids content of about 30%. The ratio Lexanharz: Koradharz was about 4: 1. The dispersion was applied to release paper between two parallel laboratory coating knives with a net gap of 0.005 inches. The solvent was removed at ambient conditions and then at 95 ° C for 10 min. The dried coating was removed from the release paper, yielding a self-supporting film of nominal 0.002 inch thickness. The film was used to make a decorative laminate consisting of a 0.4 mil clear fluoropolymer surface layer, a 4 mil vinyl flame retardant master, and the solvent-cast Lexan FST9705 film as a backing. The laminate was solidified in a laboratory press at 310 ° F and 150 psi for 5 minutes, followed by a cooling cycle. The flame retardant properties of the laminate were measured according to FAR 25.853 Appendix F, parts IV and V, with the laminates adhered to a conventional Crush Core phenolic plate (available from Schneller, LLC) using a 2 mil layer of a flame retardant, heat activated adhesive , The material showed a total heat development of 42.6 kW-min / m2 over 2 min and a peak heat development rate of 43.6 kW / m2. Fuel smoke measurements showed a maximum smoke density within 4 min (Ds max) of 96.1.
    REPLACED -13-
    Comparative Example: Extruded Lexan-FSTQTOS'-Filny ·
    An extruded Lexan FST9705 nominal 2 mil resin film was used to produce a decorative laminate consisting of a 0.4 mil clear fluoropolymer surface layer, a 4 mil vinyl flame retardant masterbatch, and the solvent cast Lexan FST9705 film was used as backing. The laminate was solidified in a laboratory press at 310 ° F and 150 psi for 5 minutes, followed by a cooling cycle. The resulting decorative laminate material had a surface density of 254 g / m 2. The resulting laminates showed an average tensile strength of 1.65 N in the machine direction (continuous lamination direction) and 1.77 N in the transverse direction when tested according to ISO 4674, Method A2 at a test speed of 100 mm / min. The laminate exhibited a tensile strength of 196 N / 25 mm width in the machine direction and 203 N / 25 mm in the transverse direction when tested according to ISO 527-3 with a Type 2 sample at a test speed of 50 mm / min. The flame retardant properties were measured according to FAR 25.853 Annex F, parts IV and V wherein the laminates were bonded to a conventional Crush Core phenolic plate (available from Schneller, LLC) using a 2 mil layer of a flame retardant, heat activated adhesive. The material showed a total heat development of 35.7 kW-min / mz over 2 minutes and a peak heat development rate of 40.4 kW / m2. Fuel smoke measurements showed a maximum smoke density within 4 min (Ds max) of 98.1.
    | NACHQEREIOHT -14-
    权利要求:
    Claims (11)
    [1]
    * «*» »· ** * * k I #« ** ·· «** * 4 PATENT CLAIMS · - · * ·· '·· *: *' ·: · 1. Solvent-cast film based on polycarbonate Comprising: a polycarbonate resin, a polymer resin and a solvent.
    [2]
    2. A solvent-cast polycarbonate-based film according to claim 1 in combination with a fluoropolymer surface layer and a vinyl embossed layer.
    [3]
    3. A solvent-cast polycarbonate-based film according to claim 2 as a support layer for the fluoropolymer surface layer and the vinyl embossed layer.
    [4]
    A polycarbonate-based solvent-cast film according to claim 1, wherein the polycarbonate resin is a homopolymer, copolymer, terpolymer, a polymer alloy or a polymer blend.
    [5]
    A polycarbonate-based solvent-cast film according to claim 1, wherein the polycarbonate resin is a polymer blend of acrylic polymers or copolymers, thermoplastic polyurethanes or polyvinyl chloride polymers or copolymers.
    [6]
    A polycarbonate-based solvent-cast film according to claim 1, wherein the solvent is 1,3-dioxolane
    [7]
    A solvent-cast polycarbonate-based film according to claim 1, wherein the solvent is an extender agent.
    [8]
    A polycarbonate-based solvent-cast film according to claim 1, wherein the solvent is a co-solvent of PM acetate, monoglyme, diglyme or ethyl glyme. N ACHG EREICHT -15- ** · # · · * * * * »» * ····· · I · * ι · ·· i I * * * * I l 9 t M »Ml I
    [9]
    A solvent-cast oil-calcium carbonate base according to claim 1, wherein the polycarbonate resin is co-soluble with the polymer resin.
    [10]
    The solvent-cast polycarbonate-based film of claim 1, wherein the polycarbonate resin is dissolved in 1,3-dioxolane at a concentration greater than about 20% resin solids.
    [11]
    A solvent-cast polycarbonate-based film according to claim 1, wherein the polycarbonate resin is dissolved in 1,3-dioxolane having a final solid content of about 30%. REPLACED -16-
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    法律状态:
    2016-08-15| REJ| Rejection|Effective date: 20160815 |
    优先权:
    申请号 | 申请日 | 专利标题
    US36233010P| true| 2010-07-08|2010-07-08|
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