CA1213699A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Dental restorative composition
Assignee: Colgate Palmolive Co
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Filing: 1981-04-28
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Granted: 1986-11-04
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Expires: 2001-04-28
Abstract
Abstract Abstract of the Disclosure A polymerizable dental composition containing methacrylate monomer(s) and free radical polymerization catalyst for said monomer(s), the monomer(s) having been treated with a sulfonated cation-exchange resin in free acid form prior to contact thereof with said catalyst or during contact thereof with said catalyst but prior to free radical liber- ation by said catalyst, to improve the stability of the monomer(s) - catalyst system against polymerization, particularly under ambient conditions.
Inventors
- 👤 Samuel C. Temin
- 👤 Mildred C. Richards
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-04 12:34
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/48; C07C67/62; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C08; C08F; C08F22/00; C08F22/10; C08F22/1006
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
98 words
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS: 1. A polymerizable composition stabilized against premature activation of catalyst component comprising at least one methacrylate monomer having 2 to 4 polymerizable olefinic double bonds and free radical-liberating polymerization catalyst capable when activated of initiating polymerization of said monomer, said catalyst being present in amount sufficient to achieve a predetermined rate and/or degree of polymerization, said monomer having been treated prior to or during contact thereof with said catalyst with a sulfonic acid type cation-exchange resin in free acid form.
Claim 2
Dependent Claim
27 words
A composition according to claim 1 wherein at least about 50 weight percent of said methacrylate monomer contains at least one aromatic ring in its central portion.
Claim 3
Dependent Claim
27 words
A composition according to claim 1 wherein at least about 50 weight percent of said methacrylate monomer is the reaction product of bisphenol A and glycidyl methacrylate.
Claim 4
Dependent Claim
15 words
A composition according to claim 3 containing up to about 50 weight percent hexamethylene dimethacrylate.
Claim 5
Dependent Claim
27 words
A composition according to claim 4 wherein said monomer comprises an approximate 1:1 mixture of the reaction product of bisphenol A and glycidyl methacrylate and hexamethylene dimethacrylate.
Claim 6
Dependent Claim
24 words
A composition according to claim 1 containing up to about 400% by weight based on the weight of said monomer of particulate inorganic filler.
Claim 7
Dependent Claim
13 words
A composition according to claim 6 wherein said filler is a siliceous material.
Claim 8
Dependent Claim
11 words
A composition according to claim 7 wherein said filler is silica.
Claim 9
Dependent Claim
24 words
A composition according to claim 8 containing up to 5 weight percent 19 based on the weight of said monomer of silane coupling agent.
Claim 10
Dependent Claim
43 words
A composition according to claim 1 containing from about .5 to 5 weight percent based on weight of said monomer of free radical catalyst selected from the group consisting of benzoyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, p-methyl benzene hydroperoxide and diisopropyl benzene hydroperoxide.
Claim 11
Dependent Claim
119 words
A polymerizable dental composition stabilized against premature activation of catalyst component comprising at least one methacrylate monomer having 2 to 4 polymerizable olefinic double bonds, at least about 50 weight percent thereof compris- ing the reaction product of bisphenol A and glycidyl methacrylate, from about .5 to 5% based on weight of said monomer of free radical-liberating polymerization catalyst comprising an organic peroxide or hydroperoxide compound, from 0 to 400% based on weight of said monomer of particulate inorganic siliceous filler, and from 3 to 6% based on weight of said monomer of silane coupling agent, said monomer having been treated prior to contact with said catalyst with a sulfonic acid type cation exchange resin in free acid form.
Claim 12
Dependent Claim
40 words
A composition according to claim 11 wherein said monomer is an approximate 1:1 blend of the reaction product of bisphenol A and glycidyl methacrylate and hexamethylene dimethacrylate, and said silane coupling agent is present in an amount of about 5%.
Claim 13
Dependent Claim
57 words
A process for the preparation of the composition of claim 1 which comprises treating a methacrylate monomer composition containing at least one methacrylate monomer having 2 to 4 polymerizable olefinic double bonds with a sulfonic acid type cation exchange resin in free acid form, followed by or simultaneous with contact of said monomer composition with said catalyst.
Claim 14
Dependent Claim
26 words
A process according to claim 13 wherein said treatment of monomer composition with said cation exchange resin is prior to free radical liberation by said catalyst.
Claim 15
Dependent Claim
27 words
A process according to claim 13 wherein at least about 50 weight percent of said methacrylate monomer contains at least one aromatic ring in its central portion.
Claim 16
Dependent Claim
27 words
A process according to claim 13 wherein at least about 50 weight percent of said methacrylate monomer is the reaction product of bisphenol A and glycidyl methacrylate.
Claim 17
Dependent Claim
20 words
A process according to claim 16 wherein up to about 50 weight percent of said methacrylate monomer is hexamethylene dimethacrylate.
Claim 18
Dependent Claim
27 words
A process according to claim 17 wherein said monomer comprises an approximate 1:1 mixture of the reaction product of bisphenol A and glycidyl methacrylate and hexamethylene dimethacrylate.
Claim 19
Dependent Claim
29 words
A process according to claim 13 wherein up to about 400% by weight, based on the weight of said monomer, of particulate inorganic filler is included in the composition.
Claim 20
Dependent Claim
13 words
A process according to claim 19 wherein said filler is a siliceous material.
Claim 21
Dependent Claim
12 words
A process according to claim 20 wherein said filler is silica. 21
Claim 22
Dependent Claim
28 words
A process according to claim 21 wherein up to 5 weight percent of silane coupling agent, based on the weight of said monomer, is included in the composition.
Claim 23
Dependent Claim
50 words
A process according to claim 13 wherein there is included in the composition from about .5 to 5 weight percent based on weight of said monomer of free radical catalyst selected from the group consisting of benzoyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, p-methyl benzene hydroperoxide and diisopropyl benzene hydroperoxide. 22
References Cited (Backward Citations)
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