Process for the production of polyurethane elastomers and foams

Details Process for the production of polyurethane elastomers and foams Process for the production of polyurethane elastomers and foams

1978-04-24

1979-01-09

Cockeram, H.S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 63, 528 64, 528 70, 528 71, 521129, C08G 1810, C08G 1814, C08G 1832

Patent

active

041339436

ABSTRACT:
The instant invention relates to an improved process for the production of cellular or non-cellular polyurethane urea elastomers, in which diamines which contain ester groups are used as chain lengthening agents. A characteristic feature of the process according to the invention is the use of salts of aromatic diaminocarboxylic or sulphonic acids as a portion of the chain lengthening component. Elastomers produced by this process are distinguished by their improved mechanical properties, in particular their increased tensile strength and tear propagation resistance as well as their reduced permanent elongation.

REFERENCES:
patent: 3479310 (1969-11-01), Dieterich et al.
patent: 3491050 (1970-01-01), Keberle et al.
patent: 3681290 (1972-08-01), Meckel et al.
patent: 3794621 (1974-02-01), Meckel et al.
patent: 3870684 (1975-03-01), Witt et al.
patent: 3998871 (1976-12-01), Carlson
patent: 4039514 (1977-08-01), VAN Gulick

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