• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Pipes or pipe fittings that are fire resistant and electrically conducting are formed by filament winding of a fire resistant, electrically conducting hardenable polymeric composition that includes 2 to 8% by weight of electrically conducting carbon black uniformly dispersed throughout the composition.
    公开号:SU843781A3
    申请号:SU2753198
    申请日:1979-04-06
    公开日:1981-06-30
    发明作者:Гордон Райн Кеннет；Деннис Кернау Ричард
    申请人:Бристоль Композит Матириалзинджиниринг Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to tubes for moving liquids. Pipes molded from reinforced polymeric material are most often manufactured by filament winding, i.e. winding the reinforcing fibers on the core and impregnating them with the polymer composition. Connecting parts of pipes, such as joints and elbows, are made in a similar way, except that the structure is molded from pre-fabricated tape, and the filament-winding method in this case can be considered as a method of tape winding. There has long been a need for corrosion-resistant pipes that are used in underground mining to pump corrosive mine water. However, in an explosive atmosphere such as the atmosphere of coal mines containing methane, plastic materials for the manufacture of pipes are used limitedly due to their inherent high specific surface resistance and low fire resistance. Were enterprise. Attempts to adapt such pipes from plastic materials to the specified areas, but none of them allowed solving the problem completely. For example, it is possible to reduce surface resistivity by using an external conductive coating or an external metallic conductor, but for surface damage, such coatings lose their effectiveness, and if there is an internal coating or conductor, then there is a danger that such a pipe will play the role of a voltage capacitor. A known method is to cast under pressure a product from polymer compositions containing such an amount of carbon black that provides the product with electrical conductivity. However, such products require the use of a large amount of carbon black to impart the required conductivity, and the viscosity of polymer compositions containing this amount of carbon black before vulcanization increases to such an extent that it is impossible to effect a filament wrap. In general, a filament-wound composition should have A viscosity of not more than 70,000 cP measured on a Brookfield viscometer at a shear rate of 0.6 rpm at room temperature.
    As a result of the conducted research, the specific surface resistance was established, taking into account safety requirements, for explosive atmospheres, which is not
     7, Om should translate --g-, where
    D is the external diameter of the pipe in millimeters. Typical sizes of pipes manufactured for British coal mines have a D in the range from 50 to 300 mm. For example, if the pipe diameter is 100 mm, then the surface resistivity should be no more than 7, 5-10 ohms.
    The requirement for resistance to ignition is that if, on the outside of the pipe, for 30 seconds, the flame is opened and then removed, then the burning or smoldering of the pipe should last no more than 5s.
    Closest to the present invention is a pipe made of a layer of glass fiber filler impregnated with polyester or phenol formaldehyde or a furan binder 1.
    However, the known pipe does not have fire resistance and electrical conduction.
    The purpose of the invention is to provide fire resistance and electrical conductivity of the pipe.
    I
    This goal is achieved in that the fiberglass filler in the pipe is impregnated with a flame retardant binder using c: moles based on tetrachlorophthalic anhydride as a polyester resin, and as a furan resin — a furfuryl alcohol based resin and bonded carbon additionally contains carbon in the following ratio binder components, parts:
    100 2-8
    The pipe contains a binder based on phenol-formaldehyde resin and an acid hardener in the following ratio of binder components, parts by weight:
    Phenol formaldehyde resin 100
    Acid Hardener .5-15
    The proposed pipe or pipe fittings, which are electrically, conductive and fire-resistant, are made of a wound fibrous reinforcing structure impregnated with a flame-resistant, electrically conductive polymer
    composition containing 2-8% by weight of the composition of the electrically conductive carbon black, uniformly di, spergirovanny by volume of the composition.
    It has been found that if the polymer composition is flame retardant, then the required electrical conductivity can be obtained in the presence of a much smaller amount of carbon black, ieM could be expected, and thus, it is possible to make liqueur compositions that have low viscosity and high wettability and which can be used in filament winding method.
    An important feature of the proposed
    15 of the tube is that the carbon black is uniformly dispersed throughout the composition, i.e. through the thickness of the pipe or the connecting part of the pipe, and thus is not
    0 completely in the surface layer, which is easily damaged. It is preferable that the basis of the polymer composition was halogenated polyester, resin based on furfuryl
     alcohol or phenol formaldehyde
    resin, preferably halogenated polyester. The polymer material used for the composition may be fire resistant in nature, but more often to increase the fire resistance of the polymer composition in
    its composition introduces special additives. As such, known flame retardants such as particulates of an aluminum compound or halogen-containing phosphate can be used, or it can be an additive that by itself does not have the ability to slow down the ignition, but when it interacts with the polymer, it increases its fire resistance.
    A preferred polymeric material for the compositions is tetrachlorophthalic anhydride based polyester resin. When using a halogenated polyester, it is mixed with a flame retardant, typically an aluminum compound, such as aluminum hydroxide, and optionally with a halogen-containing
    0 flame retardant.
    If a resin based on furfuryl alcohol is included as a polymer material, then it is desirable to use an additional fire retardant such as halogenated phosphate. A suitable additive for these purposes is tris- (2, 3-dibromopropyl phosphate). In addition, the composition on the basis of resin
    0 from furfuryl alcohol can include an acid donor. In his presence, in particular with its excess, the fire resistance increases so much that the dosage of additional anti-pyrene in the composition can be
    significantly reduce or completely eliminate.
    In the case when phenol-formaldehyde resin is the basis of the polymer composition, it is usually not necessary to use flame retardant additives, but instead it is desirable to include a greater amount of acid hardener in the composition, as compared to the commonly used one. For example, the amount of acid hardener for phenol-formaldehyde cm < 7 > or furfuryl alcohol-based resins is from 1 to 4% (by weight of the composition).
    It has been established that the use of a combination of carbon black and an excess of acid hardener or carbon black and flame retardant, which is not electrically conductive, results in a higher electrical conductivity than using the same amount of carbon black without the addition of hardener or flame retardant. accordingly, it is easy to formulate compositions suitable for filament winding, and the filament winding process itself is carried out in such a way that the composition properties are the same by volume, and, most importantly, the carbon black will not be separated in the bulk of the composition.
    It is desirable that all the ingredients of the polymeric composition be limited to compounds that do not form harmful, from the point of view of the safety rules of underground mining, substances. Acetylene carbon black is a very suitable type of carbon black, as it has the greatest electrical conductivity, but duct / thermal and furnace carbon. Carbon can give mixtures a certain degree of electrical conductivity, depending on the particle size.
    Reinforcing fibers can be of various forms, for example, in the form of a textile material, roving for winding, a layer of shredded pressed fibers, a twisted rove or a textured fabric. Usually they are made of glass. Preferably, the polymeric compositions are formulated so that in the absence of carbon black they have a viscosity of. 500 to 1000 cps. The compositions used should ensure the penetration of the resin into the fibers, wet them firmly together, with the formation of a continuous polymer matrix on the reinforcing winding of fibers. The filament winding process is carried out in the usual way.
    The proposed pipe is particularly valuable for pumping corrosive mine water. However, it can be used for other purposes.
    If the flow to be transported through the pipe is non-conductive, for example, dry gas containing dust particles, another advantage of the pipe lies in its low internal surface specific resistance, resistance, along with external surface resistance. the pipe can be used as handrails, in which case it can
    s be solid and square in cross section.
     Example 1. 4h. finely divided acetylene carbon black is mixed with 100 parts of a tetrachlorophthalic angiridd based polyester resin previously mixed with aluminum hydroxide trihydrate, used as a flame retardant, and an optional halogen-containing flame retardant and 2 parts of a 50% paste benzo benzo benzo benzo benzoyl benzoylphenol. The viscosity of the mixture obtained is 4500 cps. The pipe is made from it and rovings made of fiberglass or fiberglass using the usual filament winding method and obtained from,
    5 The product is vulcanized at 120 ° C. for 15. min. The resistance to ignition is evaluated by the method described above. The electrical resistance is 0.03 MΩ. The process is repeated in the presence of
    0 10% carbon black. The viscosity of the composition before vulcanization is 20,000 00 cP, which makes it difficult to carry out the filament winding process. However, the fire resistance is satisfactory, and the electrical resistance is O MΩ.
    Example 2. 4h. finely ground acetylene black is mixed with 100 parts of phenol-formaldehyde resin and 5 hours of “acid hardener”. As a hardener, any of the usual strong acid hardeners used in combination with phenol-formaldehyde resins are used. The resin blend is applied onto; layers of wound glass fiber and glass fabric in the usual way, the product gelatinizes at room temperature, and then it is cured at 120 ° C for 15 minutes. Viscosity
    0 composition prior to vulcanization cdctavie 66500 cP. The vulcanized product has a satisfactory fire resistance and an electrical resistance of 8 MOM. When the process is repeated in the presence of 10% hardener, the fire resistance is satisfactory, but the electrical resistance is 6 MΩ. With the introduction of the composition of 15% hardener, fire resistance is satisfactory, but
    0 electrical resistance is even lower than 6 MΩ.
    Thus, in one of the processes. Sov, where used 5% carbon black, 5% hardener and 90% Poltek-2 dos5
    - electric resistance is 0.1 MΩ.
    Example 3.4h. finely divided acetylene carbon black is mixed with 100 parts of furfuryl alcohol resin, which is pre-mixed with tris- (2,3-dibromopropyl phosphate) used as a flame retardant, and 2.5 parts of an acid catalyst, for example, an aromatic acid. The mixture, viscosity 2680 SP, is applied to layers of wound glass fiber, glass fabric and gelled at room temperature, then cured for 15 minutes. The vulcanized product has a satisfactory fire resistance and an electrical resistance of 0.1 MΩ. When the process is carried out in the presence of 10% carbon black, the viscosity of the mixture exceeds 10,000 bo, which makes it difficult to carry out the application process during filament winding.
    but the fire resistance after curing is satisfactory, and the electrical resistance was zero. Similarly, in the presence of 15% carbon black, the fire resistance is also satisfactory, the electrical resistance is zero, but the viscosity exceeded 2,000,000 cP.
    For comparison, a pipe is prepared from a polymeric composition that does not possess ignition resistance. The process is carried out analogously to Example 1, but using a non-fireproof polyester, i.e. non-halogenated polyester, for example, Cristik-189 with various amounts of technical grade and aluminum hydroxide trihydrate as a flame retardant.
    The results are presented in Table. 1, where FR is an aluminum hydroxide trihydrate as a flame retardant.
    Table 1
    Viscosity, cp Fire resistance Besco-BeskoElectric resistance is not always certain, MOhm is high
    The results of Table 1 indicate that this product is completely unacceptable, regardless of whether it contains a flame retardant or not, the electrical resistance is infinitely large, but when comparing about, tests C and D, it is clear that the addition of flame retardant to the mixture containing 10% carbon black , reduces the electrical resistance to zero, but the fire resistance remains neutral.
    The results of antistatic pipe experiments are presented in table 2.
    Table 2.
    .1000 50 40 40
    2000
    1500
    1000
    500
    200
    100
    100
    200 12200 Unsatisfied Infinitely Great
    The proposed pipe is economical, 40 since it possesses good corrosion resistance, fire resistance and mechanical strength in combination with low electrical resistance, based on the use of an easily processed resin, it has the ability to wet the fibrous reinforcing layer.
    权利要求:
    Claims (2)
    [1]
    1. A pipe made of layers of glass fiber filler impregnated with a thermosetting binder based on polyester or phenol-formaldehyde or furan resin, characterized in that, to ensure the fire resistance and electrical conductivity of the pipe, the glass fiber filler is impregnated with a fire-resistant binder with a polyester resin used tetrachlorophthalic anhydride-based resins, as a furan resin — resins based on furfuryl alcohol and a binder additionally co2 million Infinitely large 9 8 holding it is carbon black with the following ratio of binder components, ies.ch .; Resin 100 Technical - carbon 2-8
    [2]
    2. Tpy6k according to claim 1, which contains a binder based on a phenol-formaldehyde resin and an acid hardener in the following ratio of binder components, parts by weight V. 4378110 Phenol-formaldehyde resin 100 Acid hardener 5 -15 „5. Sources of information taken into consideration in the examination 1. Andreev G.Ya. Production and use of fiberglass plastics. Yu M "GOSINTI, 1962, p., 4-12 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU843781A3|1981-06-30|Tube
    KR100268613B1|2000-10-16|Fire resistant pipe
    US4076873A|1978-02-28|Resorcinol-aldehyde resins used to bind reinforcing materials such as glass fibers in shaped object form
    US5286576A|1994-02-15|Compression molded flame retardant and high impact strength ultra high molecular weight polyethylene composition
    US3556922A|1971-01-19|Fiber-resin composite of polyamide and inorganic fibers
    DE69629046T2|2004-06-24|FIRE-RESISTANT PIPES
    Farajpour et al.2015|Effect of borax on the thermal and mechanical properties of ethylene‐propylene‐diene terpolymer rubber‐based heat insulator
    Hogg1983|Factors affecting the stress corrosion of GRP in acid environments
    EP0172957B1|1990-03-14|Phenolic blast tube insulators for rocket motors
    US4156752A|1979-05-29|Fire protection covering for small diameter missiles
    US4351878A|1982-09-28|Coating for gasifiable carbon-graphite fibers
    KR101947743B1|2019-05-08|Method for Manufacturing Incombustible Fiberglass Reinforced Plastic for outlet duct and pipe of in factory of manufacturing semiconductor
    CN105199309A|2015-12-30|High performance insulated bakelite
    US4276328A|1981-06-30|Impregnation of yarns
    WO1993017173A1|1993-09-02|Improvements in and relating to textile treatment
    EP0005440A1|1979-11-28|Filament-reinforced plastic article and its method of manufacture
    DE2722308C2|1984-09-06|Fiber-reinforced insulation material for protecting iron and concrete objects against water and / or corrosion
    CN109096717A|2018-12-28|A kind of Antielectrostatic glass fiber reinforced plastic composite material
    US2383604A|1945-08-28|Thermal insulation and method of manufacture
    JPH0648848A|1994-02-22|Incombustible composite material structure and its production
    US4164601A|1979-08-14|Coating for fibrous carbon material in boron containing composites
    CN105924894A|2016-09-07|Antistatic wear-resisting phenolic moulding plastic
    HU201967B|1991-01-28|Process for producing coating composition
    KR20210142897A|2021-11-26|Eco-friendly semi-noncombustible sheet having excellent non-combustibility without gas toxicity
    EP1082213A1|2001-03-14|Non-asbestos insulation for rocket motor casing
    同族专利:
    公开号 | 公开日
    US4246306A|1981-01-20|
    DE2914011A1|1979-10-18|
    GB2018780A|1979-10-24|
    ZA791450B|1980-04-30|
    PL214746A1|1980-03-24|
    GB2018780B|1982-10-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1381413A|1920-01-06|1921-06-14|Henry A Gardner|Fabric for airships and process of making same|
    US2937665A|1955-10-17|1960-05-24|Trenton Corp|Pipe covering|
    US3290426A|1964-01-06|1966-12-06|Transpolymer Ind Inc|Plastic pipe having a conductive exterior surface and method of making the same|
    FR2358271B1|1976-07-12|1980-03-07|Rhone Poulenc Ind|US5049850A|1980-04-21|1991-09-17|Raychem Corporation|Electrically conductive device having improved properties under electrical stress|
    US5178797A|1980-04-21|1993-01-12|Raychem Corporation|Conductive polymer compositions having improved properties under electrical stress|
    JPH05173402A|1991-12-20|1993-07-13|Minolta Camera Co Ltd|Electrifying brush|
    DE19507025A1|1995-03-01|1996-09-05|Huels Chemische Werke Ag|Multi-layer pipe with an electrically conductive inner layer|
    US6503026B1|1997-09-12|2003-01-07|Redi-Therm Insulation, Inc.|Static free method for blowing loose fill insulation|
    AUPP228298A0|1998-03-12|1998-04-09|Spiral Guard Australia Pty Ltd|A sheath|
    AU747837B2|1998-03-12|2002-05-23|Spiral Guard Australia Pty Ltd|A sheath|
    GB0800538D0|2008-01-11|2008-02-20|Crompton Technology Group Ltd|Fuel pipes with controlled resistivity|
    AU2012250487B2|2011-05-05|2013-05-23|Pipelion Operations Pty Ltd|A fire retardant and anti static pipe|
    US20130228726A1|2012-03-02|2013-09-05|Yun Zheng|Injection moldable esd compounds having low tribo-charge|
    GB2503938B|2012-07-13|2017-08-02|Crompton Tech Group Ltd|Composite tube|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB1366678|1978-04-07|
    [返回顶部]