Polyurethane elastic molding material

Details Polyurethane elastic molding material Polyurethane elastic molding material

1975-06-26

1978-09-05

Person, Sandra M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528 85, 260860, C08G 1828

Patent

active

041119134

ABSTRACT:
Elastic, temporarily adhesive polyurethanes are produced by reaction of a polyol having a molecular weight in excess of about 500, a diisocyanate and a chain lengthener, the diisocyanate being present in about 0.4 to 1.4 times the weight of the polyol and in about 3.5 to 12.5 times the molar amount of the polyol, the chain lengthener having active hydrogen atoms and being present in about 3 to 12 times the molar amount of the polyol, the chain lengthener having a molecular weight of less than about 300, more than about 50 mole % of each of the polyol and diisocyanate units and up to about 50 mole % of the chain lengthener units comprising linear aliphatic C.sub.6 units.

REFERENCES:
patent: 2741800 (1956-04-01), Brockway
patent: 3357954 (1967-12-01), Kirkaldy
patent: 3931113 (1976-01-01), Seeger et al.
patent: 3957753 (1976-05-01), Hostettler et al.

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