The polypropylene composition of the present invention comprises: a blend of a resin composition composed of a specific polypropylene type resin (C) and at least one saturated polyester resin(D), an epoxy group containing copolymer (e) and at least one rubber selected from the group consisting of an
The polypropylene composition of the present invention comprises: a blend of a resin composition composed of a specific polypropylene type resin (C) and at least one saturated polyester resin(D), an epoxy group containing copolymer (e) and at least one rubber selected from the group consisting of an ethylenic copolymer rubber (F), a modified ethylenic copolymer rubber (G) obtained by graft copolymerizing an unsaturated carboxylic acid or a derivative thereof onto an ethylenic copolymer rubber and a modified ethylenic copolymer rubber (H) obtained by graft copolymerizing an unsaturated carboxylic acid or derivative thereof and an unsaturated aromatic monomer onto an ethylenic copolymer rubber, and a basic compound (I) optionally added as a reaction accelerator. The polypropylene composition according to the present invention is not only good in molding processability but also markedly effective in that it can give molded products much superior in physical properties to those obtained from individual polymers constituting the thermoplastic resin composition. The novel polypropylene composition provided by the present invention can easily be processed into a molded product, a film, a sheet or the like by a molding method usually used for molding thermoplastic resins, for example, injection molding, extrusion molding or the like, giving a product which has a very good balance among stiffness, heat resistance, impact resistance, scratch resistance, coating properties, oil resistance, chemical resistance, water resistance, etc., and is excellent in appearance uniforming and smoothness. It can be advantageously used for a purpose requiring especially high heat resistance and impact resistance, in particular, low-temperature impact resistance.
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A polypropylene composition consisting of (1) 100 parts by weight of a resin composition consisting of 1% to 99% by weight of at least one crystalline polypropylene resin (C) selected from the group consisting of (a) a modified polypropylene (A) obtained by graft copolymerizing onto a polypropylene
A polypropylene composition consisting of (1) 100 parts by weight of a resin composition consisting of 1% to 99% by weight of at least one crystalline polypropylene resin (C) selected from the group consisting of (a) a modified polypropylene (A) obtained by graft copolymerizing onto a polypropylene (B) a monomer consisting of 0.01 to 10 parts by weight of an unsaturated carboxylic acid or the anhydride thereof per 100 parts by weight of the polypropylene (B), and (b) a composition comprising 5% by weight or more, based on the composition, of the modified polypropylene (A) and the polypropylene (B), and (ii) 99% to 1% by weight of at least one saturated polyester resin (D) comprising diol components and dicarboxylic acid components, at least 40 mole % of which are terephthalic acid, (2) 0.01 to 300 parts by weight of an epoxy group-containing polymer (E) which is selected from the group consisting of (i) a copolymer of 99.9% to 50% by weight of ethylene and 0.01 to 50% by weight of at least one unsaturated epoxy compound selected from the group consisting of (a) glycidyl acrylate, (b) glycidyl methacrylate, (c) clycidyl itaconate, (d) allyl glycidyl ether, (e) 2-methylalyl glycidyl ether and (f) p-styryl glycidyl ether, (ii) a copolymer of 99.9% to 50% by weight of ethylene, 0.1% to 50% by weight of the unsaturated epoxy compound as defined above and at least one ethylenically unsaturated compound selected from the group consisting of (a) vinyl acetate, (b) methyl acrylate, (c) ethyl acrylate, (d) methyl methacrylate, (e) vinyl chloride, (f) vinylidene chloride, and (g) isobutyl vinyl ether, and (iii) a mixture of the copolymers (i) and (ii), (3) 0.01 to 300 parts by weight of at least one rubber selected from the group consisting of (i) a modified ethylenic copolymer rubber (G) obtained by graft copolymerizing onto an ethylenic copolymer rubber (F) a monomer consisting of 0.5 to 15 parts by weight of an unsaturated carboxylic acid or the anhydride thereof per 100 parts by weight of the ethylenic copolymer rubber (F), (ii) a modified ethylenic copolymer rubber (H) obtained by graft copolymerizing onto an ethylenic copolymer rubber (F) a copolymer consisting of 0.5 to 15 parts by weight of either an unsaturated carboxylic acid or the anhydride thereof and 0.2 to 20 parts by weight of an unsaturated aromatic monomer per 100 parts be weight of the ethylenic copolymer rubber (F), (iii) a mixture comprising at least 10% by weight, based on the mixture, of modified ethylenic copolymer rubber (G) and ethylenic copolymer rubber (F), and (iv) a mixture comprising at least 10% by weight, based on the mixture, of modified ethylenic copolymer rubber (H) and ethylenic copolymer rubber (F), (4) up to 5 parts by weight of a basic compound (I) optionally added as a reaction accelerator, (5) optionally, a filler (J) in an amount of 0.01 to 300 parts by weight per 100 parts by weight of the resin composition (1), said polypropylene (B) being at least one crystalline polypropylene selected from the group consisting of (i) a crystalline propylene homopolymer, (ii) a crystalline propylene random copolymer which is a copolymer of propylene and at least one other alpha-olefin, and (iii) a crystalline propylene block copolymer comprising (a) a first segment containing a crystalline propylene homopolymer or a crystalline propylene random copolymer of propylene and 6 mole % or less of at least one other alpha-olefin, and (b) a second segment containing a random copolymer of 10 mol % or more of ethylene and at least one other alpha-olefin, said ethylenic copolymer rubber (F) being at least one ethylene-alpha-olefin rubber selected from the group consisting of (i) an ethylene-alpha-olefin copolymer rubber which consists of a copolymer of 15% to 85% by weight of ethylene and 85% to 15% by weight of an alpha-olefin, and (ii) an ethylene-alpha-olefin-nonconjugated diene copolymer rubber which consists of a terpolymer of 15% to 85% by weight of ethylene, 85% to 15% by weight of an alpha-olefin and 3% by weight or less of a nonconjugated diene, said unsaturated carboxylic acid or the anhydride thereof being selected from the group consisting of (i) acrylic acid, (ii) methacrylic acid, (iii) maleic acid, (iv) itaconic acid, (v) maleic anhydride, and (vi) itaconic anhydride, said unsaturated aromatic monomer being selected from the group consisting of (i) styrene, (ii) o-methylstyrene, (iii) p-methylstyrene, (iv) m-methylstyrene, (v) alpha-methylstyrene, and (vi) vinyltoluene, the content of the saturated polyester resin (D) in said polypropylene composition being less than 50% by weight.
Jin, Yang Seog; Park, Seong Ki; Jin, Chang Woo; Lee, Chan Ki; Cho, Se Hyun, Composition of resin based on polyolefin with improved surface printability.
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