Patent ID: 6414059
Filing Date: 2002-07-02
Classification: C08L,H01B,H02G

Abstract:
A fire-retardant resin composition, which comprises:a thermoplastic resin component (A) comprising (a) 5 to 55% by weight of a block copolymer made up of at least two polymer blocks A mainly made of a vinyl aromatic compound as its constitutional component and at least one polymer block B mainly made of a conjugated diene compound as its constitutional component, and/or a hydrogenated block copolymer obtained by hydrogenating the block copolymer, (b) 0 to 4.0% by weight of a nonaromatic-series softening agent for rubber, (c) 0 to 40% by weight of an ethylene/&agr;-olefin copolymer, (d1) 5 to 80% by weight of at least one copolymer of an ethylene/vinyl acetate copolymer, an ethylene/(meth)acrylic acid copolymer, or an ethylene/(meth)acrylate copolymer, (e) 0 to 50% by weight of a polypropylene resin, and (f) 0 to 30% by weight of a modified polyethylene resin being modified with an unsaturated carboxylic acid or a derivative thereof, and (g) 0.01 to 0.6 parts by weight of an organic peroxide, (h) 0.03 to 1.8 parts by weight of a (meth)acrylate-series and/or allyl-series crosslinking aid, and 50 to 300 parts by weight of a metal hydrate (B), respectively to 100 parts by weight of the thermoplastic resin component (A), wherein the metal hydrate (B) is such that (i) when the metal hydrate (B) is in an amount of 50 parts by weight or more but less than 100 parts by weight, 50 parts by weight or more of the metal hydrate (B) to 100 parts by weight of the thermoplastic resin component (A) is made up of a metal hydrate that is being pretreated with a silane coupling agent; or (ii) when the metal hydrate (B) is in an amount of 100 parts by weight or more but 300 parts by weight or less, at least half of the amount of the metal hydrate (B) is made up of a metal hydrate that is being pretreated with a silane coupling agent; and the fire-retardant resin composition is a mixture of the above formulation that is heated and kneaded at a temperature equal to or higher than the melting temperature of the thermoplastic resin component (A) resulting in a partially crosslinked thermoplastic fire retardant resin composition.