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:
May. 15, 1984
Filed:
Apr. 23, 1982
Chester E Ramey, Chagrin Falls, OH (US);
Charles J Rostek, Jr, Chagrin Falls, OH (US);
Ferro Corporation, Cleveland, OH (US);
Abstract
Amide or 3-alkylation of 2,2,5,5-tetra-substituted imidazolidin-4-ones, using either monofunctional or polyfunctional cyclic ethers as alkylating agents, under basic conditions, or an ethylene carbonate. The cyclic ether reactants may be aldehydes or ketones having a single carbon atom in the ring. The alcohols obtained from ether addition to the 2,2,5,5-tetrasubstituted imidazolidin-4-ones may be converted to esterified derivatives by treatment with carboxylic acids or esters. Representative esters from mono- or polyalkylated imidazolidinones possess superior light stabilizing activity. Also embraces new compounds that are useful as light stabilizers for synthetic polymers.