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. 26, 2008
Filed:
Feb. 26, 2003
Shaun L. Herlihy, Chatham, GB;
Robert S. Davidson, Leicester, GB;
Shaun L. Herlihy, Chatham, GB;
Robert S. Davidson, Leicester, GB;
Sun Chemical Co., Parsippany, NJ (US);
Abstract
Photoinitiator compounds of formula (I): {where: A represents a direct bond or a group of formula —[O(CHRCHR]—, —[O(CH)CO]—, or —[O(CH)CO]—[O(CHRCHR)]—, where one of Rand Ris hydrogen and the other is hydrogen or methyl; a is a number from 1 to 2; b is a number from 4 to 5; Q is a residue of a polyhydroxy compound having 2 to 6 hydroxy groups; x is a number greater than 1 but no greater than the number of available hydroxyl groups in Q; y is a number from 1 to 10; R, R, Rand Rare individually the same or different and each is hydrogen, hydroxy, or alkyl; or Rand Rare joined to form a fused ring system with the benzene rings to which they are attached; and Rrepresents a direct bond, an oxygen atom or a methylene group} are useful as cationic photoinitiators, especially for use in surface coating applications, such as printing inks and varnishes, and which are intended to be cured by polymerisation initiated by radiation.