Abstract:
PROBLEM TO BE SOLVED: To obtain a polycarbonate resin composition having high fluidity and giving a molded article having excellent impact resistance, or the like. SOLUTION: The objective polycarbonate resin composition contains (a) a polycarbonate resin and (b) a styrene resin and further contains, based on 100 pts.wt. of (a)+(b), (c) 0.5-10 pts.wt. of a graft copolymer resin composed of a copolymer of an aromatic vinyl polymer and a (meth)acrylate polymer and (d) 0.5-10 pts. wt. of a graft copolymer resin containing a rubbery polymer having a glass transition point of
Abstract:
PROBLEM TO BE SOLVED: To modify a polyblend of a polycarbonate resin and a styrene resin to obtain a thermoplastic resin compsn. improved in flowability and impact strength. SOLUTION: 100 pts.wt. polyblend comprising 50-95 wt.% polycarbonate resin (1) and 50-5 wt.% styrene resin (2) is compounded with 0.1-20 pts.wt. compatibilizer (3) and, if necessary, with a polyalkylene arylate resin (4) and a polyphenylene ether resin (5) to obtain the objective compsn. Ingredient (2) includes a rubbermodified polystyrene resin. The domain 2 of ingredient (2) dispersed in the matrix 1 of ingredient (1) is surrounded by ingredient (3). Ingredient (3) is a block copolymer (C) comprising a polystyrene block (A) and polybutadiene blocks (B) present at the molecular ends, and the double bonds of the polybutadiene blocks have been epoxidized. The addition of an organophosphorus compd. (6) as a flame retardant and a fluororesin (7) as an auxiliary flame retardant to the above-obtd. compsn. gives a nonhalogen flame-retardant thermoplastic resin compsn.
Abstract:
PROBLEM TO BE SOLVED: To modify a polymer blend consisting essentially of a polycarbonate based resin and a rubber-modified polystyrene-based resin into a thermoplastic resin composition having the fluidity and impact strength comparable to those of a polycarbonate-based resin containing an ABS-based resin blended therein and to obtain a nontoxic flame retarded thermoplastic resin based on the modified composition. SOLUTION: This thermoplastic resin composition comprises 0.1-5 pts.wt. polyphenylene ethereal resin in 100 pts.wt. resin composition composed of 30-95 wt.% polycarbonate-based resin and 5-70 wt.% rubber-modified polystyrene-based resin. Furthermore, the flame retarded thermoplastic resin composition is obtained by adding 1-40 pts.wt. organophosphorus compound and 0.05-5 pts.wt. fluoroethylene-based polymer to the thermoplastic resin composition.
Abstract:
PROBLEM TO BE SOLVED: To obtain a melamine phosphate capable being added to resins to impart high flame retardancy to the resins. SOLUTION: This melamine phosphate has the following characteristics. (1) Heat-absorbing regions are observed in 290±10 deg.C, 320±10 deg.C and 390±10 deg.C, when measured at a temperature-rising rate of 10 deg.C/min by a differential thermal analysis. (2) Peaks (referred to as P1, P2 and P3, respectively) are observed at diffraction angles 2θ of 17.5±0.5, 19.3±0.5 and 24.9±0.5 in an X-ray pattern spectrum. The peak P1 exhibits the maximum strength, and the peak P2 exhibits the second or third strength. (3) The atomic ratio (N/P) of nitrogen (N)/ phosphorus (P) is 6.2-7.8.
Abstract:
PROBLEM TO BE SOLVED: To improve the strength etc. of a carbon filament reinforced polyolefin-based resin. SOLUTION: This molded article is manufactured by injection-molding a carbon filament reinforced resin pellet obtained by being impregnated with an acid group-containing polyolefin-based resin (A), a carbon fiber surface-treated with a sizing agent (s) having a functional group capable of reacting with the acid group. Further, the temperature of an injection-molding machine cylinder during the injection-molding is 250 to 300°C. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To eminently improve the mechanical strength of a place necessary for a fiber-reinforced thermoplastic resin molding. SOLUTION: In the fiber-reinforced thermoplastic resin molding, the average content of reinforcing fibers is 5-70 wt.%. A resin joint part having an internal rib effect in the direction of force applied to the molding is formed at a position needing strength in the molding so that an X layer, a Y layer, and a Z layer meet conditions in which the X layer is a fiber-reinforced thermoplastic resin layer with a matrix formed by the thermoplastic resin and has a thickness of 10 mm or below and the content of the reinforcing fibers of 5-70 wt.%; the Y layer is a non-reinforced thermoplastic resin layer having a thickness of 0.05 mm or below and the content of the reinforcing fibers of below 5 wt.%; and the Z layer is a fiber-reinforced thermoplastic resin layer with a matrix formed by the thermoplastic resin and has a thickness of 10 mm or below and the content of the reinforcing fibers of 5-70 wt.%. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition with improved flowability and impact strength by modifying a polymer blend of a polycarbonate-based resin and a styrene-based resin. SOLUTION: This thermoplastic resin composition is obtained by incorporating 100 pts.wt. of a resin composition comprising (1) a polycarbonate and (2) a styrene-based resin in the weight ratio of (50:50) to (95:5) with (3) 0.1-20 pts.wt. of an impact improver, and, as necessary (4) a polyalkylenearylate-based resin, (5) polyphenylene ether, (6) a flame retardant, and/or (7) a flame retarding auxiliary. In the composition, the impact improver is interposed lying in a row in the form of particles along part or the whole of the interface between the polycarbonate's matrix 10 and the styrene-based resin's domains 20; and the impact improver may be constituted of a thermoplastic graft copolymer formed by grafting a (meth)acrylic monomer and an aromatic vinyl monomer to a rubbery polymer.
Abstract:
PURPOSE: To provide a styrenic resin compsn. capable of mass production of molded products excellent in releasability from a mold with no deformation of the molded products. CONSTITUTION: The compsn. comprises (a) 100 pts.wt. styrene resin; (b) 0.1-2.0 pts.wt. mixed ester of pentaerythritol and/or dipentaerythritol with a dibasic org. acid and a higher fatty acid, and/or higher fatty acid ester of pentaerythritol and/or dipentaerythritol; (c)0.1-2.0 pts.wt. ethylenebisstearylamide; and (d) 0.1-2.0 pts.wt. low-mol.-wt. polyethylene.
Abstract:
PURPOSE:To provide the title compsn. which gives a molding which is excellent in releasability from a metal mold without being deformed and can be mass-produced. CONSTITUTION:The compsn. comprises 100 pts.wt. styrenic resin, 0.1-2 pts.wt. higher fatty acid and/or its metal salt, 0.1-2 pts.wt. ethylenebisamide, and 0.1-2 pts.wt. low-mol.-wt. polyethylene.
Abstract:
PURPOSE:To provide the subject composition comprising a brominated bisphenol A type epoxy polymer and a styrene-butadiene block copolymer, capable of reducing the amount of a flame retardant, and improved in flame retardance and dripping. CONSTITUTION:The objective composition comprises (A) 100 pts.wt. of a styrenic resin, (B) 15-40 pts.wt. of a brominated bisphenol A type epoxy resin, (C) 2-10 pts.wt. of antimony trioxide, and (D) 2-15 pts.wt. of styrene-butadiene block copolymer. Examples of preferable component B include an epoxy resin having a structure of formula I (R1 is H, methyl; n is 1-30; k, m are 1-4; the end M is terminated with a group of formula II, etc.), etc.