Process for producing polyurethane elastomer by mixing a hardene

Details Process for producing polyurethane elastomer by mixing a hardene Process for producing polyurethane elastomer by mixing a hardene

1980-03-18

1982-04-27

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 63, 528 64, C08G 1810

Patent

active

043272045

ABSTRACT:
A polyurethane elastomer is produced by mixing a hardener composition containing a polyamine, a long chain polyol having an average molecular weight of 300 to 4,000 and a catalyst with an isocyanate composition comprises a prepolymer having terminal isocyanate group and an average molecular weight of 500 to 5,000 and an organic diisocyanate monomer with or without a triisocyanate monomer and a ratio of isocyanate groups of said prepolymer to amino groups of said polyamine is in a range of 0.6:1 to 1.5:1 and a ratio of a total of isocyanate groups in said isocyanate composition to a sum of amino groups of said polyamine and hydroxyl group of said long chain polyol is in a range of 0.8:1 to 1.4:1.

REFERENCES:
patent: 3718624 (1973-02-01), Rustad
Wyman, Rubber World, May, 1978, pp. 41-44.

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