Abstract:
PURPOSE: To obtain a composition suitable for a household appliance and an OA(office automation) device material, having excellent heat resistance and impact resistance, comprising a styrenic resin, a specific bromine-based flame- retardant, antimony trioxide and a styrene-butadiene copolymer. CONSTITUTION: This composition comprises (A) 100 pts.wt. of a styrenic resin, (B) 10-30 pts.wt. (preferably 15-25 pts.wt.) of a bromine-based flame-retardant of the formula (R is O or a 1-6C alkylene; (i) and (j) are 0-5) having >=30wt.% bromine content, (C) 2-10 pts.wt. (preferably 4-7 pts.wt.) of antimony trioxide powder having 1-150μm average particle diameter and (D) 5-20 pts.wt. (preferably 10-15 pts.wt.) of a styrene-butadiene block copolymer. A (high-impact) polystyrene, AS resin, ABS resin, AAS resin and AES resin may be cited as the component A.
Abstract:
PROBLEM TO BE SOLVED: To improve physical properties such as the strength or the like of a carbon fiber reinforced polyolefin resin. SOLUTION: The heat-treated, long carbon-fiber-reinforced resin pellets are obtained by subjecting long carbon-fiber-reinforced pellets (mentioned below) to heat treatment at a temperature T of 50-160°C for a time t of 0.1-100 hours. The above long carbon-fiber-reinforced pellets are obtained by impregnating a long carbon-fiber (B), which is surface-treated with a sizing agent (s) having a functional group that is reactant with an acid group, with an acid group-containing polyolefin resin (A), which has an acid amount of 0.05-0.5 wt.% on the average in maleic anhydride equivalent, so that the weight ratio of the long carbon-fiber (B) may be ≥5 wt.% and COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition capable of modifying a polymer blend of a polycarbonate-based resin and a polystyrenebased resin and of improving fluidity and impact strength. SOLUTION: This thermoplastic resin composition is obtained by compounding 100 pts.wt. of a resin composition composed of a polycarbonatebased resin (1) having the ratio of a terminal hydroxyl group based on the whole end of >=1 mol.% (about 5-40 mol.%) and a polystyrenebased resin (2) such as a rubber- modified polystyrene-based resin in the ratio of the resin (1)/the resin (2) of 30/70-95/5 (wt.%) with 0.1-20 pts.wt. of a diene-based block copolymer (3), if required, a polyalkylene arylate (4) and a polyphenylene ether-based resin (5). An epoxy modified block copolymer, etc., are contained in the block copolymer component (3). When an organic phosphorus compound as a flame-retardant (6) and a fluororesin as a flame-retardant auxiliary (7) are added to the composition, a nonhalogen-based flame-retardant thermoplastic resin composition is obtained.
Abstract:
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin compsn. excellent in flowability and impact strength by compounding a compsn. comprising a polycarbonate resin and a rubber-modified polystyrene resin with a specific arom. vinyl/conjugated diene block copolymer. SOLUTION: This compsn. is prepd. by compounding 100 pts.wt. compsn. comprising 30-95wt.% polycarbonate resin (A) and 5-70wt.% rubber-modified polystyrene resin (B) with 0.5-20 pts.wt. block coplymer (C) having polymer blocks mainly comprising arom. vinyl units and polymer blocks mainly comprising conjugated diene units and/or its modification product. Ingredient B contains 15-25wt.% rubbery polymer particles having a vol. average particle size of 0.3-5μm and a gel content of 15-70wt.%. The modification product of ingredient C is a partial hydrogenation product (D) of ingredient C or an epoxy- or acid- modification product of ingredient D. The compsn. has physical properties equivalent to those of an ABS-modified polycarbonate and can be made flame- retardant by the addition of an organophosphorus compd. and a fluoroethylene polymer.
Abstract:
PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition having an improved fluidity and impact strength comparable to a polycarbonate-based resin blended with an ABS-based resin by modifying a polymer blend consisting essentially of a polycarbonate-based resin and a polystyrene-based resin and to provide a harmless fire resistant composition by using the improved thermoplastic resin composition. SOLUTION: This thermoplastic resin composition comprises following components (1) and (2), and the fire resistant composition is obtained by adding following components (3) and (4) thereto in addition: (1) 100 pts.wt. resin composition comprises 10-94.5wt.% polycarbonate-based resin, 5-70wt.% polystyrene-based resin and 0.1-20wt.% aromatic polyester; (2) 0.5-20 pts.wt. epoxy-modified block copolymer obtained by an epoxidation of double bonds derived from conjugated double bonds in (C) a block copolymer having both (A) a polymer block consisting essentially of a vinyl aromatic compound and (B) a polymer block consisting essentially of a conjugated diene compound in a same molecule or (D) its partially hydrogenated block copolymer; (3) 1-40 pts.wt. organic phosphorus compound; and (4) 0.05-5 pts.wt. fluoroethylene-based polymer.
Abstract:
PROBLEM TO BE SOLVED: To obtain a resin composition for cleaning, capable of rapidly removing materials left in the heating cylinder, etc., of a molding machine in a minimized amount by compounding an anionic surfactant, a polyhydric alcohol, an alkylene glycol fatty acid ester and a fatty acid metal salt with a styrenic resin. SOLUTION: This resin composition comprises (A) 100 pts.wt. of a styrenic resin, (B) 0.5-20 pts.wt. of an anionic surfactant, (C) 0.5-20 pts.wt. of a polyhydric alcohol (e.g. pentaerythritol), (D) 0.1-20 pts.wt. of an alkylene glycol fatty acid ester (e.g. propylene glycol monobehenate) and (E) 0.05-5 pts.wt. of a fatty acid metal salt (e.g. zinc stearate).
Abstract:
PROBLEM TO BE SOLVED: To obtain an injection molded article having excellent weld appearance or the like at a low cost by incorporating a predetermined amt. of an aluminum particle having a specified vol. average particle diameter into an impact-resistant styrene resin having a specified melt index and injection molding the mixture. SOLUTION: An aluminum particle having a vol. average particle diameter of 0.2 to 1.2μm is added in an amt. of 0.001 to 0.5 pt.wt. to 100 pts.wt. impact- resistant styrene resin having a melt index of 6 to 20g/10min. If necessary, an additive, such as a colorant or a stabilizer, is further added thereto. The mixture is then melt kneaded by extrusion or the like and pelletized. The pellet is then injection molded into an injection molded article, having metallic feeling, suitable for use in a housing of audio equipment. The impact-resistant styrene resin may be prepd. by polymerizing a styrene monomer in the presence of a rubbery polymer (e.g. polybutadiene) and is pref. an impact-resistant styrene resin wherein the volume fraction of the dispersed rubber phase is in the range of from 10 to 40%.
Abstract:
PROBLEM TO BE SOLVED: To improve flame retardance of a resin composition. SOLUTION: This resin composition comprises melamine phosphate having the following characteristics and a resin such as a styrene resin. The resin composition further may contain a bicyclophosphoric ester, a polyhydric alcohol, an silicone oil, a molybdenum compound, a phosphoric ester, a fluororesin, etc. (1) Adiabatic absorption ranges are observed at 290±10 deg.C, 320±10 deg.C and 390±10 deg.C when measured at 10 deg.C/minute rate of heating by differential thermal analysis. (2) Peaks (P1, P2 and P3) are observed at ranges of 17.5±0.5, 19.3±0.5 and 24.9±0.5 angle of diffraction 2θ in X-ray diffraction spectrum, the peak P1 shows the maximum strength and the peak P3 shows the second or third strength. (3) The atomic ratio of (N/P) of nitrogen (N) to phosphorus (P) is 6.2-7.8.
Abstract:
PURPOSE: To provide a flame-retardant styrene resin compsn. having excellent flame retarclancy and heat stability while maintaining the mechanical strength of a styrene resin. CONSTITUTION: The compsn. comprises (a) 100 pts.wt. styrene resin; (b) 0.5-7.0 pts.wt. hexabromocyclododecane; (c) 0.1-1.0 pt.wt. organotin compd.; and (d) 0.05-3.0 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.
Abstract:
PROBLEM TO BE SOLVED: To enhance physical properties such as a strength of a carbon fiber-reinforced polyolefin resin. SOLUTION: In a carbon long fiber-reinforced resin pellet, a carbon long fiber (B), which is subjected to surface treatment by using a sizing agent (s) with a functional group capable of reacting with an acid group, is impregnated with a polyolefin resin (A) containing the acid group, wherein an acid amount is in a range of 0.05-0.5 wt% on an average in terms of maleic anhydride, in such a manner that a weight ratio of the fiber (B) to the total weight of the resin (A) and the fiber (B) is in the range of ≥5 wt% and