Impregnant for making semi-rigid or rigid resin foams

Details Impregnant for making semi-rigid or rigid resin foams Impregnant for making semi-rigid or rigid resin foams

1980-09-23

1983-12-06

Barr, Josephine

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

521 53, 521 55, 521137, C09K 300

Patent

active

044192614

ABSTRACT:
An impregnant which is suitable for being applied to a once produced open-cellular, soft resin foam to change its physical properties to a desired extent depending on the purpose in end use, the impregnant comprising an isocyanate selected from 4.4'-diphenylmethanediisocyanate, tolylenediisocyanate or a mixture thereof admixed with a polyurethane prepolymer obtained by reacting an isocyanate selected from tolylenediisocyanate, 4.4'-diphenylmethanediisocyanate or a mixture thereof with a polyol, and optionally a solvent for the mixture in suitable amounts.

REFERENCES:
patent: 4184022 (1980-01-01), Lawyer
patent: 4210726 (1980-07-01), Hamamusa et al.
patent: 4214055 (1980-07-01), Seefnid et al.
patent: 4239642 (1980-12-01), DePaul et al.
patent: 4247655 (1981-01-01), Dunleavy et al.
patent: 4258140 (1981-03-01), Horacek et al.

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