Isocyanate-terminated prepolymer and polyurethane foam prepared

Details Isocyanate-terminated prepolymer and polyurethane foam prepared Isocyanate-terminated prepolymer and polyurethane foam prepared

1990-11-13

1992-05-19

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521172, 521174, 521167, 521137, C08G 1810, C08L 7504

Patent

active

051149893

ABSTRACT:
This invention relates to an isocyanate-terminated prepolymer prepared from a polyisocyanate comprising 4,4'-methylene diphenyldiisocyanate and polyoxyalkylene polyol wherein the polyol has an average functionality of from about 2 to about 4, a hydroxyl equivalent weight of from about 2200 to 3500 and containing oxyethylene residues in from about 40 to about 68 percent by weight; and the use thereof in the manufacturing of flexible polyurethane foam.

REFERENCES:
patent: 4125487 (1978-11-01), Olstowski
patent: 4256849 (1981-03-01), Ick et al.
patent: 4292412 (1981-09-01), Wood
patent: 4379904 (1983-04-01), Ehrlich et al.
patent: 4526906 (1985-07-01), Wegner
patent: 4569951 (1986-02-01), Nelson
patent: 4611044 (1986-09-01), Meyer et al.
patent: 4611083 (1986-09-01), Buethe et al.
patent: 4883825 (1989-11-01), Westfall et al.
patent: 4897431 (1990-01-01), Scherzer et al.

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