PHOTOPOLYMERIZABLE COMPOSITIONS

• US 20110172323A1
• Filed: 05/20/2009
• Published: 07/14/2011
• Est. Priority Date: 05/21/2008
• Status: Active Grant

• Current Assignee: Tokuyama Dental Corporation (Tokuyama Corporation)
• Original Assignee: Tokuyama Dental Corporation (Tokuyama Corporation)
• Inventors: Yamagawa, Junichiro, Akizumi, Hironobu
• Granted Patent: US 8,394,869 B2
• Time in Patent Office: Days
• US Class Current: 522/25
• CPC Class Codes: A61K 6/62 Photochemical radical initiators
• CPC Class Codes: A61K 6/887 Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08F 2/44 Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• CPC Class Codes: C08F 2/50 with sensitising agents
• CPC Class Codes: C08F 222/1025 of aromatic dialcohols
• CPC Class Codes: C08L 33/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers

Abstract

Disclosed are photopolymerizable compositions suitable for uses such as dental composite resins, and that comprise (A) a radical-polymerizable monomer, (B) a photopolymerization initiator that comprises (B1) an α-diketone compound, (B2) a photoacid generating agent, (B3) an aromatic amine compound, and (C) an organic filler containing a phthalate ester fluorescent agent.

Claims

1. A photopolymerizable composition comprising

(A) a radical-polymerizable monomer,

(B) a photopolymerization initiator comprising

(B1) an α

-diketone compound,

(B2) a photoacid generating agent, and

(B3) an aromatic amine compound, and

(C) an organic filler containing a phthalate ester fluorescent agent.

2. The photopolymerizable composition according to claim 1, wherein the radical-polymerizable monomer is a bi- to tetra-valent polymerizable monomer.

3. The photopolymerizable composition according to claim 1, wherein the α

-diketone compound (B1) is a camphorquinone.

4. The photopolymerizable composition according to claim 1, wherein the photoacid generating agent (B2) is at least one kind selected from a s-triazine compound substituted with trihalomethyl group and a diaryl iodonium salt compound.

5. The photopolymerizable composition according to claim 1, wherein the photopolymerization initiator (B) further comprises (B4) a tertiary aliphatic amine compound having a tertiary amino group in which three saturated aliphatic groups are bonded to the nitrogen atom and at least two of the saturated aliphatic groups bonding to the nitrogen atom have each an electron attractive group.

6. The photopolymerizable composition according to claim 1, wherein the phthalate ester fluorescent agent is represented by

7. The photopolymerizable composition according to claim 1, wherein the organic filler (C) containing a phthalate ester fluorescent agent is an inorganic-containing organic filler in which inorganic particles are compounded in an amount of 150 to 600 parts by mass relative to 100 parts by mass of an organic resin.

8. A dental restorative material containing a photopolymerizable composition according to claim 1.