Process for the preparation of elastic flexible polyurethane foa

Details Process for the preparation of elastic flexible polyurethane foa Process for the preparation of elastic flexible polyurethane foa

1982-09-02

1983-12-20

Phynes, Lucille M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1800, C08G 1814

Patent

active

044218729

ABSTRACT:
For the preparation of elastic flexible polyurethane foams with improved breaking elongation and very good setting behavior as well as densities from 7 to 120 grams per liter, organic polyisocyanates are reacted in the presence of blowing agents, catalysts and, optionally, auxiliaries and/or additives with polyols based on polyoxyalkylene polyols having terminal oxyethylene blocks of a degree of oxyethylation of 1 to 13 and which have a content of primary hydroxyl groups at the corresponding degree of oxyethylation equal or exceeding the value of curve A in the Figure in which curve A describing the relationship of the content of primary hydroxyl groups with the degree of oxyethylation.

REFERENCES:
patent: 4067832 (1978-01-01), Des Marais
patent: 4125505 (1978-11-01), Crutchfield et al.
patent: 4144386 (1979-03-01), Consoli et al.
patent: 4243760 (1981-01-01), McDonald et al.
patent: 4303755 (1981-12-01), Yukuta et al.
patent: 4327194 (1982-04-01), Chandalia et al.
patent: 4373034 (1983-02-01), Speranza et al.
patent: 4374934 (1983-02-01), Raynor

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