Process for the preparation of polyurethane elastomers

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

1982-09-30

1986-05-06

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

528 44, 528 62, 528 63, 528 64, 528 76, 528 80, 528 84, C08G 1814

Patent

active

045872759

ABSTRACT:
Polyurethane urea elastomers are produced by reacting polyisocyanates with compounds containing at least two isocyanate reactive hydrogen atoms having a molecular weight of 400 to 10,000 and mononuclear or dinuclear aromatic diamines. The aromatic diamines must have at least one sulfonamide group as a substituent on at least one of their aromatic rings. Known chain lengthening agents, activators, blowing agents, auxiliary agents and additives may also be included in the reaction mixture.
Polyurethane elastomers produced by this process have excellent mechanical properties. In particular, such elastomers are soft yet have high tear propagation resistance.

REFERENCES:
patent: 3004939 (1961-10-01), Varvaro
patent: 3401151 (1968-09-01), Wieden et al.
patent: 3891606 (1975-06-01), Kogon
patent: 3926922 (1975-12-01), Baron et al.

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