The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1978
Filed:
Jun. 23, 1976
Paolo Cassandrini, Bologna, IT;
Antonio Tozzi, Sasso Marconi, IT;
Chimosa Chimica Organica S.p.A., Marconi, IT;
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.