Rapidly crystallizing polyurethane systems
First Claim
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1. A polyurethane system containing isocyanate groups prepared by reacting:
- A) 70 to 98 parts by weight of at least one polyester diol having a melting point of 30°
C. to 60°
C. and a molecular weight of a 800 to 8,000,B) 2 to 30 parts by weight of at least one polyester diol having a melting point of 65°
C. to 150°
C. and a molecular weight of 600 to 8,000, andC) no more than 1 mole of a diol having a molecular weight of less than 600 per moles of A) plus B), with,D) at least one organic polyisocyanate, the ratio of isocyanate groups to hydroxyl groups is between 3;
1 and 1.2;
1.
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Abstract
The present invention is directed to a polyurethane system containing isocyanate groups prepared by reacting
A) 70 to 98 parts by weight of at least one polyester diol having a melting point of 30° C. to 60° C. and a molecular weight of 800 to 8,000,
B) 2 to 30 parts by weight of at least one polyester diol having a melting point of 65° C. to 150° C. and a molecular weight of 600 to 8,000, and
C) no more than 1 mole of a diol having a molecular weight of less than 600 per moles of A) plus B), with,
D) at least one organic polyisocyanate, the ratio of isocyanate groups to hydroxyl groups is between 3:1 and 1.2:1.
31 Citations
9 Claims
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1. A polyurethane system containing isocyanate groups prepared by reacting:
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A) 70 to 98 parts by weight of at least one polyester diol having a melting point of 30°
C. to 60°
C. and a molecular weight of a 800 to 8,000,B) 2 to 30 parts by weight of at least one polyester diol having a melting point of 65°
C. to 150°
C. and a molecular weight of 600 to 8,000, andC) no more than 1 mole of a diol having a molecular weight of less than 600 per moles of A) plus B), with, D) at least one organic polyisocyanate, the ratio of isocyanate groups to hydroxyl groups is between 3;
1 and 1.2;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification