Catalytic process for polyurethane elastomers and foams

Details Catalytic process for polyurethane elastomers and foams Catalytic process for polyurethane elastomers and foams

1978-06-23

1979-04-17

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...

252431C, 252431N, 260 18TN, 521124, 521125, 521126, 521127, 521128, 528 55, 528 56, 528 57, 528 58, C08G 1824, B01J 3112, C08G 1820, C08G 1814

Patent

active

041502124

ABSTRACT:
This invention relates to new catalyst combinations having improved catalytic activity for isocyanate polyaddition reactions. The catalysts are combinations of known metal catalysts with aromatic compounds which contain at least one nitrogen atom as a hetero atom and have at least one primary amino group in the ortho- or para-position to the hetero atom. Preferred aromatic compounds include ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same or different, each represent a hydrogen atom, an aliphatic hydrocarbon group having from 1 to 6 carbon atoms or an aromatic hydrocarbon group having from 6 to 12 carbon atoms or two of the groups R.sub.1 to R.sub.4 represent a condensed aromatic ring.

REFERENCES:
patent: 3565875 (1971-02-01), Bozik et al.
patent: 3635906 (1972-01-01), Jayawant
patent: 3668146 (1972-06-01), Ruhle
patent: 3769244 (1973-10-01), Hashimoto et al.
patent: 3814707 (1974-06-01), Moller et al.
patent: 3899443 (1975-08-01), Reymore et al.
patent: 4006124 (1977-02-01), Welte et al.

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