US5063257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental glass ionomer cement compositions
Assignee: GC Corp
•
Filing: 1989-12-11
•
Granted: 1991-11-05
•
Expires: 2009-12-11
Abstract
Abstract A dental glass ionomer cement composition comprises: (a) 5 to 100 parts by weight of a polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 , (d) 0.01 to 5 parts by weight of a polymerization catalyst, (e) 2 to 50 parts by weight of water, (f) 0.01 to 20 parts by weight of a surface active agent, and (g) 0.01 to 5 parts by weight of a reducing agent, and optionally h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 μm and undergoing no reaction with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000".
Inventors
- 👤 Shoji Akahane
- 👤 Satoshi Tosaki
- 👤 Yukiharu Kusayanagi
- 👤 Shigenobu Kusakai
- 👤 Kazuo Hirota
- 👤 Kentaro Tomioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/77; A61K6/80; A61K6/884; A61K6/887; A61K6/889; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A dental glass ionomer cement composition consisting essentially of: (a) a polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) a polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 , (d) a polymerization catalyst, (e) water, (f) a surface active agent, and (g) a reducing agent.
Claim 2
Dependent Claim
109 words
A dental glass ionomer cement composition consisting essentially of: (a) a polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) a polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 , (d) a polymerization catalyst, (e) water, (f) a surface active agent, and (g) a reducing agent.
Claim 3
Dependent Claim
80 words
A dental glass ionomer cement composition as claimed in claim 1, wherein said "(c) polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 " undergoes no reaction with said "fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000"".
Claim 4
Dependent Claim
158 words
A dental glass ionomer cement composition consisting essentially of: (a) 5 to 100 parts by weight of a polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 , (d) 0.01 to 5 parts by weight of a polymerization catalyst, (e) 2 to 50 parts by weight of water, (f) 0.01 to 20 parts by weight of a surface active agent, and (g) 0.01 to 5 parts by weight of a reducing agent.
Claim 5
Dependent Claim
158 words
A dental glass ionomer cement composition consisting essentially of: (a) 5 to 100 parts by weight of a polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000", (c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 , (d) 0.01 to 5 parts by weight of a polymerization catalyst, (e) 2 to 50 parts by weight of water, (f) 0.01 to 20 parts by weight of a surface active agent, and (g) 0.01 to 5 parts by weight of a reducing agent.
Claim 6
Dependent Claim
73 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 3, wherein said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000" is a co- or homo-polymer containing at least one selected from the group consisting of acrylic acid, methacrylic acid, 2-chloroacrylic acid, 3-chloroacrylic acid, aconitic acid, mesaconic acid, maleic acid, itaconic acid, fumaric acid, glutaconic acid and citraconic acid.
Claim 7
Dependent Claim
45 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 4, wherein said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000" is a co- or homo-polymer containing acrylic and maleic acids.
Claim 8
Dependent Claim
43 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 5, wherein said "polymerizable unsaturated organic compound having at least one CH 2 ═C(R1)--COO--group wherein R1=H or CH 3 " is an ester of acrylic or methacrylic acid.
Claim 9
Dependent Claim
86 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 6, wherein said "fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000"" contains Al 3+ , Si 4+ , F - and O 2- as main components and including further Sr 2+ and/or Ca 2+ .
Claim 10
Dependent Claim
24 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 7, wherein said "polymerization catalyst" is a photopolymerization catalyst.
Claim 11
Dependent Claim
114 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 8, wherein said "fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 μm and a specific gravity of 2.4 to 4.0 and capable of reacting with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000" is a fluoroaluminosilicate glass powder which is coated on its surface with an organic compound having a polymerizable, ethylenically unsaturated double bond in a quantity of 0.01 to 20 parts by weight with respect to 100 parts by weight of said powder, and in which said polymerizable, ethylenically unsaturated double bond remains.
Claim 12
Dependent Claim
63 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 9, which additionally includes: h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 μm and undergoing no reaction with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000".
Claim 13
Dependent Claim
101 words
A dental glass ionomer cement composition as claimed in claim 10, wherein said "h. inorganic filler having an average particle size of 0.02 to 10 μm and undergoing no reaction with said "polymer of an α-β unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000"" is an inorganic filler which is coated on its surface with an organic compound having a polymerizable, ethylenically unsaturated double bond in a quantity of 0.01 to 20 parts by weight with respect to 100 parts by weight of said glass powder, and in which said polymerizable, ethylenically unsaturated double bond remains.
Claim 14
Dependent Claim
34 words
A dental glass ionomer cement composition as claimed in any one of claims 1 to 11, which comprises formulations A and B, each being a paste having a viscosity of 2,000 cP or higher.
Claim 15
Dependent Claim
26 words
A dental glass ionomer cement composition as claimed in claim 12, which additionally include: i. 0 to 20 parts by weight of a water-soluble high-molecular substance.
References Cited (Backward Citations)
US4820744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-04 | 1995-05-06 | 1995-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-04 | 1999-05-06 | 1999-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-04 | 2003-05-06 | 2003-11-05 | $7700.00 | Window Closed / Lapsed |