Curable composition for dentistry

Patent metadata

Field	Value
Publication number	US-9114080-B2
Application number	US-201214000085-A
Country	US
Kind code	B2
Filing date	Feb 10, 2012
Priority date	Feb 17, 2011
Publication date	Aug 25, 2015
Grant date	Aug 25, 2015

Abstract

A dental curable composition includes: a radically polymerizable monomer; a polymerization initiator; and a hyperbranched polymer, in which the hyperbranched polymer includes a unit structure represented by the general formula (I) and unit structures represented by the general formula (IIA) and/or the general formula (IIB) (in the general formula (I), A represents a single bond for bonding C and R 1 , >C═O, —O—, or —COO—, R 1 represents a divalent saturated aliphatic hydrocarbon group or a divalent aromatic hydrocarbon group, and R 2 represents a hydrogen atom or a methyl group; and in the general formula (IIA) and the general formula (IIB), R 3 , R 4 , and R 5 each represent a hydrogen atom, an alkyl group, an alkoxycarbonyl group, an aryl group, or a cyano group, and R 6 represents an alkylene group).

First claim

The invention claimed is:

1. A dental curable composition, comprising:
a radically polymerizable monomer;
a polymerization initiator; and
a hyperbranched polymer,
wherein the hyperbranched polymer consists essentially of a unit structure represented by the following general formula (I), at least one unit structure selected from a unit structure represented by the following general formula (IIA), a unit structure represented by the following general formula (IIB), and a unit structure represented by the following general formula (IIIA) and
wherein the ratio of the unit structure represented by the general formula (IIIA) in a whole unit structure is 5 mol % or less:

in the general formula (I), A represents a single bond for bonding C and R 1 , >C═O, —O—, or —COO—, R 1 represents a divalent saturated aliphatic hydrocarbon group or a divalent aromatic hydrocarbon group, and R 2 represents a hydrogen atom or a methyl group;
in the general formula (IIA) and the general formula (IIB), R 3 , R 4 , and R 5 each represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms for forming a main chain, an alkoxycarbonyl group having 1 to 5 carbon atoms for forming a main chain, an aryl group, or a cyano group; and
in the general formula (IIB), R 6 represents an alkylene group having 4 to 10 carbon atoms for forming a main chain; and
in the general formula (IIIA), A, R 1 , and R 2 are the same as A, R 1 , and R 2 shown in the general formula (I).

2. A dental curable composition according to claim 1 , further comprising a filler.

3. A dental curable composition according to claim 1 , wherein the hyperbranched polymer has a molecular weight of 22,000 or more.

4. A dental curable composition according to claim 1 , wherein the polymerization initiator comprises a photopolymerization initiator.

5. A dental curable composition according to claim 1 , wherein the at least one unit structure selected from the unit structure represented by the general formula (IIA) and the unit structure represented by the general formula (IIB) comprises a unit structure represented by the following structural formula A.

Assignees

• Shimizu Tomonao
• Yamazaki Tatsuya
• Kazama Hideki
• Akizumi Hironobu
• Tokuyama Dental Corp

Inventors

• Shimizu Tomonao
• Yamazaki Tatsuya
• Kazama Hideki
• Akizumi Hironobu

Classifications

• C08F12/34 Primary

  Monomers containing two or more unsaturated aliphatic radicals · CPC title

• A61K6/887 Primary

  Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08K9/04

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• A61K6/083 Primary

  Human Necessities · mapped topic