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US 6,365,674 B1Granted
Thermoplastic polyurethane resin
AssigneeBayer Aktiengesellschaft
InventorsWolfgang Kaufhold, James W. Rosthauser, Jeffrey S. Wiggins
Life of this patent
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Abstract
A thermoplastic polyurethane resin prepared by reacting an isocyanate, a polyol and a reactive polyolefin, and a chain extender, is disclosed. It was surprisingly and unexpectedly found that the inventive resin forms compatible blends with polyolefins.
Claims19
A thermoplastic molding composition comprising a polyurethane resin, the reactants used in its preparation comprise
- (i) at least one member selected from the group consisting of aliphatic and aromatic diisocyanates,
- (ii) at least one polymeric diol having a number average molecular weight of 500 to 10,000, selected from the group consisting of polyester polyol, polyether polyol, hydroxy-terminated polycarbonates and hydroxy-terminated copolymers of dialkyl siloxane and alkylene oxides,
- (iii) a reactive polyolefin containing isocyanate-reactive groups identical one to the other conforming to
- where X denotes an isocyanate-reactive group identical one to the other selected from the group consisting of hydroxyl, amine and carboxylic acid functional groups, and where m is about 0 to 550 and n is about 0 to 270 and the number average molecular weight of said reactive polyolefin is about 500 to 15,000 g/mol and its functionality is in the range of about 1.7 to 2.5, and
- (iv) a chain extender,
- with the proviso that said (iii) is present in an amount of at least 1.0 equivalent % relative to the amount of said (ii).
3 more elements
A thermoplastic molding composition comprising a polyurethane resin, the reactants used in its preparation comprise
- (i) at least one member selected from the group consisting of aliphatic and aromatic diisocyanates,
- (ii) at least one polymeric diol having a number average molecular weight of 500 to 10,000 selected from the group consisting of polyester polyol, polyether polyol, hydroxy-terminated polycarbonates and hydroxy-terminated copolymers of dialkyl siloxane and alkylene oxides,
- (iii) a reactive poly(ethylene/butylene)copolymer which contains two isocyanate-reactive groups identical one to the other selected from the group consisting of hydroxyl, amine and carboxylic acid functional groups,
- (iv) a chain extender,
- wherein number average molecular weight of said reactive poly(ethylene/butylene)copolymer is about 500 to 15,000 g/mol and its functionality is in the range of about 1.7 to 2.5 and wherein said (iii) is present in an amount of at least 1.0 equivalent % relative to the amount of said (ii).
2 more elements
Dependencies are inferred from the claim text.