Polyurea compounds which improve the light stability of polymers

Details Polyurea compounds which improve the light stability of polymers Polyurea compounds which improve the light stability of polymers

1976-06-23

1978-04-25

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775C, 260 775CH, 26029363, 26029369, 26029386, 260858, C08K 534, C08G 1832, C07D21198

Patent

active

040862070

ABSTRACT:
Novel polyurea compounds having the general formula ##STR1## where R.sub.1 is hydrogen, alkyl, cycloalkyl, aryl, substituted aryl, aralkyl, or a piperidine radical of the formula ##STR2## where R.sub.5, R.sub.6, R.sub.8 and R.sub.9 are alkyl and R.sub.7 is hydrogen, oxygen, alkyl, alkenyl, alkinyl or aralkyl, R.sub.2 is alkylene, cycloalkylene, arylene or aralkylene, R.sub.3 is a piperidine radical as set forth above, R.sub.4 is alkylene, cycloalkylene, arylene or aralkylene, X is zero or one, y is an integer from 2 to 200 and A and B each represent a terminal group. In some of the y units and in B the ##STR3## can be replaced in part by ##STR4## where R.sub.10 R.sub.11 and R.sub.12 are hydrogen, alkyl, cycloalkyl, aryl, aralkyl or R.sub.10 and R.sub.11, are linked together so that ##STR5## forms a 6 to 8 member heterocyclic ring
Are produced by reacting a diamine with carbonyl chloride or a diisocyanate. The compounds are valuable light stabilizers for synthetic polymers, particularly polypropylene and polyethelene.

REFERENCES:
patent: 2816879 (1957-12-01), Wittbecker
patent: 3352875 (1967-11-01), McGill
patent: 3684765 (1972-08-01), Matsui et al.
patent: 3904581 (1975-09-01), Murayama et al.
patent: 3907803 (1975-09-01), Ramey et al.
patent: 3965072 (1976-06-01), Markiewitz

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