Thermoplastic polyurethanes prepared with small amounts of monohydric alcohols
First Claim
1. A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of an organic diisocyanate, a polymeric diol, a difunctional extender and from 0.0005 equivalents to 0.05 equivalents, per equivalent of said diisocyanate, of a monohydric alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol, and the monobutyl ether of diethylene glycol.
1 Assignment
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Accused Products
Abstract
The processing temperatures of thermoplastic polyurethane elastomers are reduced, and the extrudability and the sensitivity to degradation by shear and by moisture are improved, by including a minute proportion (from 0.0005 to 0.05 equivalents, per equivalent of isocyanate) of a monohydric aliphatic alcohol in the reaction mixture (diisocyanate, polymeric diol and difunctional extender) employed to prepare thermoplastic polyurethane elastomers by the one-shot procedure.
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Citations
8 Claims
- 1. A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of an organic diisocyanate, a polymeric diol, a difunctional extender and from 0.0005 equivalents to 0.05 equivalents, per equivalent of said diisocyanate, of a monohydric alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol, and the monobutyl ether of diethylene glycol.
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5. A thermoplastic polyurethane elastomer which is the product of a one-shot reaction of:
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(a) 4,4'"'"'-methylenebis(phenyl isocyanate); (b) a polymeric diol having a molecular weight in the range of 500 to 3000; (c) a diol extender; and (d) from 0.0005 to 0.05 equivalents, per equivalent of said isocyanate, of a monohydric aliphatic alcohol selected from the class consisting of dodecyl alcohol, stearyl alcohol and the monobutyl ether of diethylene glycol; the ratio of isocyanate groups to hydroxyl groups being within the range of about 0.95;
1 to about 1.10;
1. - View Dependent Claims (6, 7)
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Specification