Polycarbonate

About: Polycarbonate is a research topic. Over the lifetime, 14032 publications have been published within this topic receiving 141740 citations. The topic is also known as: PC & Polycarbonate, PC.

Thermoplastic resin composition

Abstract: PROBLEM TO BE SOLVED: To improve an impact strength level of a specific thermoplastic resin more than the previous level. SOLUTION: The thermoplastic resin composition contains 100 pts.wt. of a thermoplastic resin (a) and 0.5-35 pts.wt. of an impact strength improver (b). The thermoplastic resin (a) is at least one selected from among a polycarbonate resin, polyester resin, polyarylate resin, polyacetal resin and alloy of these resins. The impact strength improver (b) contains a graft copolymer (b-1) having a rubber polymer and a rigid shell, a water-soluble polymer compound (b-2) having properties to form a physical gel and a gellant (b-3). Where the ratio of the rigid shell in the graft copolymer (b-1), is 1-20 wt.%, and the content of the water-soluble polymer compound (b-2) having properties to form a physical gel, is 0.01-3.0 pts.wt. to 100 pts.wt. of the graft copolymer (b-1). COPYRIGHT: (C)2008,JPO&INPIT

Abrasion resistant inorganic/organic coating materials prepared by the sol-gel method

Abstract: Novel abrasion resistant coating materials prepared by the sol-gel method have been developed and applied on the polymeric substrates bisphenol-A polycarbonate and diallyl diglycol carbonate resin (CR-39). These coatings are inorganic/organic hybrid network materials synthesized from 3-isocyanatopropyltriethoxysilane functionalized organics and metal alkoxide. The organic components are 3,3′-iminobispropylamine (IMPA), resorcinol (RSOL), diethylenetriamine (DETA), poly(ethyleneimine) (PEI), glycerol and a series of diols. The metal alkoxides are tetraethoxysilane (TEOS) and tetramethoxysilane (TMOS). These materials are spin coated onto bisphenol-A polycarbonate and CR-39 sheets and thermally cured to obtain a transparent coating of a few microns in thickness. Following the curing, the abrasion resistance is measured and compared with an uncoated control. It was found that the abrasion resistance of inorganic/organic hybrid coatings in the neat form or containing metal alkoxide can be very effective to improve the abrasion resistance of polymeric substrates. The adhesion tests show that the adhesion between coating and substrate can be greatly improved by treating the polymeric substrate surface with a primer solution of isopropanol containing 3-aminopropyltriethoxysilane (3-APS). The interaction between 3-APS and the polycarbonate surface was investigated by a molecular dynamics simulation. The results strongly suggest that the hydrogen bonding between the amino group of the 3-APS and ester group in the polycarbonate backbone are sufficiently strong to influence the orientation of the primer molecules. The abrasion resistance of these new coating systems is discussed in light of the structure of the organic components. All of these results show that these coating materials have excellent abrasion resistance and have potential applications as coating materials for lenses and other polymeric products.

Thermoplastic polycarbonate moulding compositions

Abstract: The present invention relates to high-impact, flame-repellant thermoplastic polycarbonate moulding compositions consisting of halogen-free polycarbonates, halogen-free copolymers of styrenes and (meth)acrylonitrile, halogen-free phosphorus compounds of the formula (I) ##STR1## tetrafluoroethylene polymers and small amounts of graft polymers and, if appropriate, effective amounts of stabilizers, pigments, flow control agents, mould release agents and/or antistatics, and a process for their preparation.