Flame retardant polycarbonate resin composition
A technology of resin composition and polycarbonate, applied in the field of flame-retardant polycarbonate resin composition, can solve the problems of sufficient impact strength, which cannot be said to be fully disclosed, etc.
Inactive Publication Date: 2009-08-26
TEIJIN KASEK KK
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Problems solved by technology
[0006] In Patent Document 1, although it is described that dispersibility is improved by mixing polytetrafluoroethylene in the resin with an organic polymer, it cannot be said that the resin composition described satisfies thermal stability and hydrolysis resistance.
In addition, in patent documents 2 to 4, the dispersibility of polytetrafluoroethylene is also improved by the same method, but it cannot be said that the resin composition described can satisfy hydrolysis resistance, and it cannot be said that its impact strength is also high. full
Therefore, it cannot be said that the method for solving this technical problem has been sufficiently disclosed
Method used
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Embodiment 1～38 and comparative example 1～4
[0172] In the polycarbonate resin powder produced from bisphenol A and phosgene by the interfacial polycondensation method, various additives were blended in the amounts described in Tables 1 to 3, mixed with a mixer, and then extruded by exhaust type twin-screw extrusion. An extruder (TEX30α (complete toothing, same direction of rotation, double-flight screw), manufactured by Nippon Steel Works, Ltd.) was melt-kneaded to obtain pellets. Additives were premixed with polycarbonate resin powder in advance with a Henschel mixer at a concentration 10 times the compounding amount, and then overall mixed with a mixer. Extrusion conditions were as follows: extrusion rate: 20 kg / h; screw rotation speed: 150 rpm; vacuum degree of the exhaust part: 3 KPa; extrusion temperature: 260° C. from the first supply port to the extrusion die.
[0173]After drying the obtained pellets at 120°C for 6 hours with a hot air circulation dryer, pass through an injection molding machine at a cylinder te...
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Abstract
The objective of the present invention is to provide an flame retardant polycarbonate resin composition with high fire-retardancy, excellent appearance and excellent hydrolytic resistance. The resin composition of the invention includes aromatic polycarbonate resins (A ingredient), polytetrafluoroethylene mixture (B ingredient) composed of polytetrafluoroethylene particles and organic polymers, and flame retardants (C ingredient), wherein, relative to 100 parts by weight aromatic polycarbonate resins (A ingredient), the polytetrafluoroethylene mixture (B ingredient) is 0.025-6 parts by weight, the flame retardants (C ingredient) is 0.0025-22 parts by weight.
Description
technical field [0001] The invention relates to a flame-retardant polycarbonate resin composition. More specifically, it relates to a flame-retardant polycarbonate resin composition excellent in appearance and hydrolysis resistance. Background technique [0002] Aromatic polycarbonate resins are widely used in various fields because they not only have transparency, but also have excellent flame retardancy, heat resistance, and strength. However, it cannot be said that the flame retardancy of aromatic polycarbonate resins is also sufficient in response to the recent demand for thinning electronic / electrical equipment parts, OA-related parts, and the like. Moreover, recently, high flame retardancy conforming to V-0 in UL standard (Underwriters Laboratories Inc)-94 is required in many cases, and thus its use is limited. Furthermore, in order to obtain high flame retardancy, it is important to suppress resin dripping during combustion. [0003] A method of adding polytetraflu...
Claims
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IPC IPC(8): C08L69/00C08L27/18C08K5/42C08K5/521C08K5/54
Inventor 友田琢也宫冈千春大平洋二
Owner TEIJIN KASEK KK