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. 08, 2000
Filed:
Jun. 09, 1997
Anthony J Tortorello, Elgin, IL (US);
DSM N.V., Heerlen, NL;
Abstract
A radiation curable composition comprising a urethane oligomer with a polyester backbone which composition, when cured, has improved hydrolytic stability. The composition comprises a urethane oligomer, having a polyester backbone with a number average molecular weight of less than about 1000, wherein the polyester backbone is at least in part based on a diol component wherein at least one carbon at the .beta.-position with respect to a hydroxyl group bears two carbon-containing substituents having a total of at least three carbon atoms. Alternatively, when the composition comprises a urethane oligomer with a number average molecular weight of less than about 2000, having a polyester polyol backbone with a number average molecular weight of less than about 1000, the polyester backbone is at least in part based on a diol component wherein at least one carbon at the .beta.-position with respect to a hydroxyl group bears at least one carbon-containing substituent.