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:
Feb. 14, 1989
Filed:
May. 28, 1987
Chester E Ramey, Chagrin Falls, OH (US);
Ronald E Thompson, Parma, OH (US);
Charles J Rostek, Jr, Chagrin Falls, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
The present invention relates to novel compounds corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.4 may be the same or different, and each is a lower alkyl radical; R.sub.2 and R.sub.3 may be the same or different, and each is a substituted piperidine radical; M is equal to the total number of monomer units in the polymer chain, and is of a magnitude sufficient to provide a polymer having a molecular weight of at least 500; W is equal to at least 0.5, X is equal to at least 0.1 but not greater than 0.2, Y is equal to at least 0.1, Z is equal to at least 0.05 but not greater than 0.2, and W plus X plus Y plus Z is equal to 1. These novel compounds are useful as stabilizers for a wide variety of organic materials and are prepared by transesterification of a suitable acrylate-methacrylate copolymer.