Patent ID: 6420475
Filing Date: 2002-07-16
Classification: A61C,C08L

Abstract:
An improved gelatinous composition comprising: a crystal gel formed from (i) 100 parts by weight of one or more linear triblock copolymers, multi-arm block copolymers, branched block copolymers, radial block copolymers, multiblock copolymers, poly(ethylene-styrene) random copolymers produced by metallocene catalysts, using single site, constrained geometry addition polymerization catalysts resulting in poly(ethylene-styrene) substantially random copolymers, or thermoplastic crystalline polyurethane copolymers with hydrocarbon midblocks or a mixture of two or more said copolymers having one or more crystalline poly(ethylene) components (ii) from about 250 to about 1,600 parts of a plasticizer sufficient to achieve a gel rigidity of from less than about 2 gram Bloom to about 1,800 gram Bloom; wherein said crystalline poly(ethylene) components of said (i) copolymer having a selected amount of crystallinity sufficient to achieve improvements in one or more crystal gel properties including improved tear resistance and improved resistance to fatigue; wherein said improvements in properties of said crystal gel being greater than an amorphous gel made from poly(styrene-ethylene-butylene-styrene) or poly(styrene-ethylene-propylene-styrene) having substantially non-crystalline components at corresponding said gel rigidity; in combination with or without a selected amount of (iii) one or more of a selected polymer copolymer.