Process for the preparation of noncellular polyurethane elastome

Details Process for the preparation of noncellular polyurethane elastome Process for the preparation of noncellular polyurethane elastome

1982-09-16

1984-05-15

Cockeram, H. S.

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 44, C08G 1876

Patent

active

044489463

ABSTRACT:
The invention relates to a process for the manufacture of noncellular polyurethane elastomers by reacting 4,4'-diisocyanato-1,2-diphenylethane or diisocyanato-1,2-diphenylethane isomer mixtures with a 4,4'-diisocyanato-1,2-diphenylethane content in excess of 95 percent by weight, higher molecular weight polyhydroxyl compounds and low molecular weight chain extenders optionally in the presence of auxiliaries and additives.
The polyurethane elastomers produced in accordance with this invention excel by a greater hardness and improved mechanical properties compared with polyurethane elastomers based on 4,4'-diphenylmethane diisocyanate with otherwise comparable composition.

REFERENCES:
patent: 3940371 (1976-02-01), Case
patent: 3998768 (1976-12-01), Pettit

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