Process for the production of polyurethane urea elastomers

Details Process for the production of polyurethane urea elastomers Process for the production of polyurethane urea elastomers

1980-05-09

1981-12-01

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...

528906, 528 58, 528 52, 528 51, 528 48, 528 49, 260 37N, C08G 1832, C08G 1824, C08G 1816

Patent

active

043037739

ABSTRACT:
This invention relates to a process for the production of non-cellular polyurethane ureas elastomers using a chain-extender mixture produced from asymmetrically alkyl-substituted anilines by condensation with formaldehyde. The chain-extending agents used in the instant invention show medium reactivity to compounds containing isocyanate groups. These chain-extending agents may be processed both in high-pressure and in low-pressure metering and mixing units because they are either liquid at room temperature or can be melted at relatively low temperatures (below 55.degree. C.). The homogeneous, i.e. non-cellular, polyurethane urea elastomers obtained in the instant invention are distinguished by having excellent mechanical properties.

REFERENCES:
patent: 3036996 (1962-05-01), Kogon
patent: 3188302 (1965-06-01), Lorenz
patent: 3194793 (1965-07-01), Kogon
patent: 3412071 (1968-11-01), Sundholm
patent: 3563906 (1971-02-01), Hoeschell
patent: 3702362 (1972-11-01), Shen et al.
patent: 3725354 (1973-04-01), Sundholm
patent: 4208507 (1980-06-01), Stutz et al.
patent: 4248756 (1981-02-01), Koenig et al.

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