Method for the preparation of polyurethane elastomers

Details Method for the preparation of polyurethane elastomers Method for the preparation of polyurethane elastomers

1998-03-10

2000-05-30

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521137, 521174, 521 67, 528 59, C08G 1814

Patent

active

060691840

ABSTRACT:
A method for the production of polyurethane elastomers by reacting an isocyanate epolymer having an isocyanate content of from 5 to 10% by weight which is the reaction product of an excessive amount of a polyisocyanate containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof and a polyether polyol having an average nominal hydroxyl functionality of from 2 to 4, an average hydroxyl equivalent weight of from 500 to 3000, and an oxyethylene content of from 50 to 85% by weight, with an aqueous latex to form a foam, and compressing said foam.

REFERENCES:
patent: 4158087 (1979-06-01), Wood
patent: 4367259 (1983-01-01), Fulmer et al.
patent: 5591779 (1997-01-01), Bleys et al.

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