Patent ID: 8313674
Filing Date: 2012-11-20
Classification: C08L

Abstract:
1. A flame-retardant polyolefin resin composition comprising 100 parts by weight of a polyolefin resin (A) and 50 to 400 parts by weight of an inorganic flame retarding agent (B), wherein the polyolefin resin (A) comprises 30 to 94% by weight of a crystalline polypropylene resin (A-1) comprising a copolymer of propylene and α-olefins (A-1-1), propylene homopolymer (A-1-2) and a block polypropylene copolymer (A-1-3), 1 to 30% by weight of a low-density polyethylene (A-2) in which the number of terminal vinyl groups per 1000 carbon atoms is 0.2 or more, and 5 to 10% by weight of a modified styrene thermoplastic elastomer (A-3) that possesses 0.4% by weight or more of a carboxylic acid group and/or an acid anhydride group; wherein the copolymer of propylene and α-olefins (A-1-1) is a multiple step polymerization polypropylene copolymer, which includes an ethylene-α-olefin random copolymer elastomer component having an average particle diameter of 1 μm or less finely dispersed within the crystalline polypropylene resin, forming a mutually penetrating network structure; wherein the flame-retardant polyolefin resin composition possess a tensile strength of more than 30 MPa and a tensile elongation at break in a range from 570% to 620%.