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AssigneeLubrizol Advanced Materials, Inc.
InventorsDonald A. Meltzer, Gilbert T. Montague, Patrick E. Mosier, Jacques P. E. J. Horrion
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The present invention relates to a soft, semicrystalline, thermoplastic elastomer composition which is comprised of (I) a hydrophobic thermoplastic block copolymer which is comprised of (I) the reaction product of (1) a hydrophobic polyol or polyamine, (2) a polyisocyanate or an aromatic dicarboxylic acid, and (3) a chain extender containing 2 to 20 carbon atoms, or the reaction product of (1) a hydrophobic polyol or polyamine, and (2) a carboxyl terminated telechelic polyamide sequence; wherein the hydrophobic polyol or polyamine has a number average molecular weight in the range of from 1,000 to 4,000 Daltons; wherein the hydrophobic thermoplastic block copolymer has a weight average molecular weight in the range of 50,000 to 1,000,000 Daltons; and (II) from 1 to 80 weight percent of a mineral oil, wherein the soft, semicrystalline, thermoplastic elastomer composition has a Shore A hardness which is within the range of 20 to 80.
A soft, semicrystalline, polyurethane thermoplastic elastomer composition which is comprised of (I) a hydrophobic thermoplastic block copolymer which is comprised of the reaction product of (1) at least one hydrophobic polyol, wherein said hydrophobic polyol is a diacid polyester polyol made with dimerised fatty acids and wherein said dimer fatty acid contains 36 carbon atoms, (2) a polyisocyanate, and (3) at least one chain extender containing 2 to 20 carbon atoms, wherein the hydrophobic polyol has a number average molecular weight which is within the range of about 1,000 to about 4,000 Daltons;
An article of manufacture that is comprised of a soft, semicrystalline, polyurethane thermoplastic elastomer composition overmolded onto a hard substrate wherein the soft, semicrystalline, thermoplastic elastomer composition is comprised of (I) a hydrophobic thermoplastic block copolymer which is comprised of the reaction product of (1) at least one hydrophobic polyol, wherein said hydrophobic polyol is a diacid polyester polyol made with dimerised fatty acids and wherein said dimer fatty acid contains 36 carbon atoms, (2) a polyisocyanate, and (3) at least one chain extender containing 2 to 20 carbon atoms, wherein the hydrophobic polyol has a number average molecular weight which is within the range of about 1,000 to about 4,000 Daltons;
Dependencies are inferred from the claim text.