Flame retardant PC/ABS composite with high rigidity and high stability
A technology with high stability and composition, applied in the field of flame retardant PC/ABS composition, can solve the problems of low tensile/flexural modulus, not imparting flame retardancy, and not having flame retardancy, etc. Dimensional stability, excellent flame retardancy, low equipment abrasion effects
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[0040] Component A: a linear polycarbonate based on bisphenol A, with a relative solution viscosity of 1.24, measured with methylene chloride as a solvent at 25° C. and a concentration of 0.5 g / 100 ml.
[0041] Component B: graft polymer, by 40 weight parts of styrene and acrylonitrile by the copolymer graft of the ratio of 73:27 in 60 weight parts by the thick shape cross-linked polybutadiene rubber (average) prepared by emulsion polymerization Particle diameter d 50 = 0.3 μm).
[0042]Component C: styrene / acrylonitrile copolymer, the weight ratio of styrene / acrylonitrile is 78 / 28, and the intrinsic viscosity is 0.55dl / g (measured in dimethylformamide at 20'°C).
[0043] Component D: Bisphenol A-based oligophosphate, BDP, produced in Changchun, Taiwan.
[0044] Component E: Tetrafluoroethylene polymer, as a coacervation mixture, prepared from an emulsion in water of an acrylonitrile-styrene copolymer (SAN graft polymer) according to component B above and an aqueous emulsion...
Embodiment 2
[0055] A high-rigidity and high-stability flame-retardant PC / ABS composition, the composition comprises the following components and formula:
[0056] 40 parts by weight of polycarbonate;
[0057] 50 parts by weight of graft polymer;
[0058] 30 parts by weight of talcum powder;
[0059] Wollastonite 20 parts by weight.
[0060] In the described talcum powder, MgO 30% by weight, SiO 2 70% by weight, the average maximum particle size of the talc powder d50<20 μm; the carbon element content in the wollastonite is 0.1% by weight, the average aspect ratio of the wollastonite is 7 μm, and the average fiber diameter is 1 μm.
[0061] The above raw materials are mixed at a high temperature of 200-260°C for 2-3 hours to obtain the product. The resulting products can be used as films, profiles, rails, internal components of vehicles, sea vessels, aircraft or other vehicles, electrical equipment housings with small transformers, equipment housings for information processing and dis...
Embodiment 3
[0063] A high-rigidity and high-stability flame-retardant PC / ABS composition, the composition comprises the following components and formula:
[0064] 98 parts by weight of polycarbonate;
[0065] 0.5 parts by weight of graft polymer;
[0066] 5 parts by weight of talcum powder;
[0067] Wollastonite 2 parts by weight;
[0068] Antioxidant 1010 2 parts by weight.
[0069] Described polycarbonate comprises bisphenol A type polycarbonate 88wt% A bis (diphenyl phosphate) BDP12wt%; Described graft polymer is vinyl monomer diene grafting at glass transition temperature< On the grafted polymer diene rubber at 10°C, the vinyl monomer diene accounts for 5% of the total weight of the grafted polymer.
[0070] In the described talcum powder, MgO 40% by weight, SiO 2 70% by weight and Al 2 o 3 0% by weight, the average maximum particle size d50 of the talc powder is less than 10 μm; the carbon element content in the wollastonite is 2% by weight, the average aspect ratio of the w...
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