Polyhydroxy urethanes formed by reaction of reduced sugars and organic diisocyanates
First Claim
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1. Low molecular weight polyhydroxy urethanes having a molecular weight of less than about 1,500 consisting essentially of the reaction product of the hydroxyl groups of at least about a 1.5 molar excess of a reduced sugar of the formula Cx H2(x+1) Ox where x is 4, 5 or 6 and the isocyanate groups of a diisocyanate.
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Abstract
Polyhydroxy urethanes prepared from reduced sugars of the formula Cx H2(x+1) Ox where x is 4, 5 and 6 and diisocyanates are disclosed. There is a molar excess of 1.5 and preferably 2.0 of the reduced sugar in the polyhydroxy urethane product and the molecular weight of the product is generally less than 1,500 and preferably less than 1,000.
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17 Claims
- 1. Low molecular weight polyhydroxy urethanes having a molecular weight of less than about 1,500 consisting essentially of the reaction product of the hydroxyl groups of at least about a 1.5 molar excess of a reduced sugar of the formula Cx H2(x+1) Ox where x is 4, 5 or 6 and the isocyanate groups of a diisocyanate.
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