Process for the preparation of cellular polyurethane elastomers

Details Process for the preparation of cellular polyurethane elastomers Process for the preparation of cellular polyurethane elastomers

1982-09-20

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...

C12P 716

Patent

active

044218702

ABSTRACT:
The invention relates to a method for the preparation of cellular polyurethane elastomers with densities of approximately 250 to 800 grams per liter by reacting 4,4'-diisocyanato-1,2-diphenylethane or a diisocyanato-1,2-diphenylethane isomer mixture with a 4,4'-diisocyanato-1,2-diphenylethane content of more than 95 percent by weight with higher molecular weight polyhydroxyl compounds and water, as well as optionally chain extenders in the presence of auxiliaries and/or additives according to the one-shot or preferably the prepolymer method in closed molds.
Compared with products based on 4,4'-diisocyanatodiphenylmethane, the polyurethane elastomer molded parts have improved physical and thermal properties.

REFERENCES:
patent: 3933701 (1976-01-01), Puig et al.
patent: 3960788 (1976-06-01), Cuscurida et al.

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