Dental composition

Patent metadata

Field	Value
Publication number	US-12564543-B2
Application number	US-202017766827-A
Country	US
Kind code	B2
Filing date	Oct 7, 2020
Priority date	Oct 8, 2019
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

An object of the present invention is to provide a dental composition that shows desirable adhesive properties to tooth structure, and that has desirable mechanical strength in the form of a cured product while having low polymerization shrinkage stress. The present invention relates to a dental composition comprising: a (meth)acrylic compound (A); a monomer (B) having an acidic group and a molecular weight of less than 5,000; a monomer (C) having no acidic group and having a molecular weight of less than 5,000; and a polymerization initiator (D), the (meth)acrylic compound (A) having an average molecular weight of 5,000 to 50,000, and an average molecular weight of 1,250 or more and less than 20,000 per (meth)acryl group.

First claim

The invention claimed is:

1 . A dental composition comprising: a (meth)acrylic compound (A) having a weight-average molecular weight of 5,000 to 50,000; a monomer (B) having an acidic group and a molecular weight of less than 5,000; a monomer (C) having no acidic group and having a molecular weight of less than 5,000; and a polymerization initiator (D),
the (meth)acrylic compound (A) having a weight-average molecular weight of 1,250 or more and less than 20,000 per (meth)acryl group, wherein the polymerization initiator (D) comprises: a water-soluble photopolymerization initiator (D-1) having a solubility at 25° C. of 10 g/L or more in water; and a water-insoluble photopolymerization initiator (D-2) having a solubility at 25° C. of less than 10 g/L in water.

2 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) is a urethanized (meth)acrylic compound (A-1).

3 . The dental composition according to claim 2 , wherein the urethanized (meth)acrylic compound (A-1) is a (meth)acrylate having: a structure selected from the group consisting of a polyester, a polycarbonate, a polyurethane, a polyether, a poly-conjugated diene, and a hydrogenated poly-conjugated diene; and a urethane bond.

4 . The dental composition according to claim 1 , wherein the content of the (meth)acrylic compound (A) is 0.1 to 30 parts by mass in total 100 parts by mass of the (meth)acrylic compound (A), the monomer (B) having an acidic group, and the monomer (C) having no acidic group.

5 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a viscosity at 25° C. of 5,000 cps or more.

6 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a glass transition temperature (Tg) of 20° C. or less.

7 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a weight-average molecular weight of 6,100 or more and less than 20,000 per (meth)acryl group.

8 . The dental composition according to claim 1 , wherein the monomer (B) having an acidic group and a molecular weight of less than 5,000 comprises a phosphoric acid group-containing monomer.

9 . The dental composition according to claim 1 , wherein the monomer (C) having no acidic group and having a molecular weight of less than 5,000 comprises a hydrophobic monomer (C-1) having no acidic group and having a molecular weight of less than 5,000.

10 . The dental composition according to claim 9 , wherein the hydrophobic monomer (C-1) having no acidic group and having a molecular weight of less than 5,000 comprises an aliphatic compound-based bifunctional monomer.

11 . A self-adhesive dental composite resin comprising a dental composition of claim 1 .

12 . A dental bonding material comprising a dental composition of claim 1 .

13 . A dental cement comprising a dental composition of claim 1 .

14 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a weight-average molecular weight of 12,100 to 50,000.

15 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a weight-average molecular weight of 12,500 to 30,000.

16 . The dental composition according to claim 1 , wherein the (meth)acrylic compound (A) has a weight-average molecular weight of 12,500 to 20,000.

Assignees

• Kuraray Noritake Dental Inc

Inventors

• Matsuura Ryo
• Kajikawa Tatsuya

Classifications

• C08L33/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• A61K6/62 Primary

  Photochemical radical initiators · CPC title

• A61K6/30

  Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives · CPC title

• A61K6/887 Primary

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