Patent ID: 6399708
Filing Date: 2002-06-04
Classification: B29C,B29K,H01R,Y10T

Abstract:
A bulk polymerized grafted and crosslinkable thermoplastic polyolefin powder composition having elasticity and flexibility properties, comprising:a) from less than 100 down to 5% by weight of at least one polymer of ethylene containing at least 50 molar % of ethylene; b) from more than 0 up to 95% by weight of at least one thermoplastic elastomer comprising a member selected from the group consisting of ethylene-propylene rubber, ethylene-propylene-diene monomer, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, styrene-butadiene rubber, optionally partially or completely crosslinked, styrene-isoprene-styrene, butyl rubber, nitrile-butyl rubber, hydrogeno-nitrile-butyl rubber, polyvinyl acetate, polypropylenes (homopolymers) with amorphous and semi-crystalline blocks and copolymers of propylene-ethylene with amorphous and semi-crystalline blocks, with the proviso that components (a) and (b) constitute at least about 85% by weight of the polymeric content of said thermoplastic polyolefin powder composition; and wherein components (a) and (b) are different; c) from 0.1 to 15 parts by weight of a grafting agent, per 100 parts by weight of combined (a) and (b); and d) from 0.001 to 0.5 parts by weight of a hydrolysis catalyst per 100 parts by weight of combined (a) and (b); and optionally comprising an internal release agent selected from the group consisting of the class of montanic derivatives, stearate salts, their amines, their amides, hydrogenated hydrocarbon resins, polyethylene, polypropylene and ethylene/vinyl acetate (EVA) copolymer waxes, resins from copolymerization of aliphatic and aromatic monomers, silicone oils and silicone-modified ethylene oxide and/or propylene oxide oils.