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:
Aug. 16, 2005
Filed:
Nov. 12, 2003
Takeshi Suzuki, Tokyo, JP;
Hideki Kazama, Tokyo, JP;
Takeshi Suzuki, Tokyo, JP;
Hideki Kazama, Tokyo, JP;
Tokuyama Corporation, Yamaguchi, JP;
Tokuyama Dental Corporation, Tokyo, JP;
Abstract
A photocationic polymerization initiator comprising (A) a photo acid-generating compound and (B) a fused polycyclic aromatic compound, wherein said fused polycyclic aromatic compound has a molecular structure in which a fused aromatic ring is further condensed with a non-aromatic ring, and at least one of the atoms constituting said non-aromatic ring directly bonded to a common atom in the fused aromatic ring and the non-aromatic ring, is a saturated carbon atom, said saturated carbon atom having at least one hydrogen atom. Upon blending the photopolymerizable monomer with the photocationic polymerization initiator, there is obtained a photocationically polymerizable composition having a high sensitivity for the visible light rays, which is useful for dental applications, exhibiting a sufficiently high curing rate and offering sufficient depth of curing upon the irradiation with light for only a short period of time.