Process for producing high resilience polyurethane foam

Details Process for producing high resilience polyurethane foam Process for producing high resilience polyurethane foam

1990-07-30

1992-04-14

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521110, 521112, 521123, 521137, 521159, C08G 1814

Patent

active

051049074

ABSTRACT:
A process for producing a high resilience polyurethane foam by reacting a polyol with a polyisocyanate in the presence of a catalyst, a blowing agent, and a foam stabilizer; said polyisocyanate containing at least diphenylmethane diisocyanate and/or a mixture of diphenylmethane diisocyanate with a derivative thereof, the blowing agent being water, or water and a halogenated hydrocarbon in amounts of not less than 2 parts by weight of water and not more than 20 parts by weight of the halogenated hydrocarbon based on 100 parts by weight of the polyol, and the catalyst being at least one selected from the compounds represented by the formula (I) below: ##STR1## where R.sup.1 is alkyl having 1 to 4 carbons, dimethylaminopropyl, benzyl, vinyl, or hydroxyalkyl having 1 to 3 carbons; R.sup.2 is hydrogen, alkyl having 1 to 4 carbons, alkyl, benzyl or phenyl; and R.sup.3 and R.sup.4 are independently hydrogen, alkyl having 1 to 4 carbons, or hydroxymethyl.

REFERENCES:
patent: 4264744 (1981-08-01), Milovanovic et al.
patent: 4910231 (1990-03-01), Pham et al.
High Polymers, vol. XVI, "Polyurethanes, Chemistry and Technology": by Saunders-Frisch, Interscience Publishers, New York, London, vol. I, 1962, pp. 32-42, 44-54 and vol. II, 1964, pp. 5-6 and 198-199.

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