EP0059525A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dental compositions
Assignee: Dentsply Sirona Inc
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Filing: 1982-01-12
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Granted: —
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Expires: 2002-01-12
Abstract
Abstract Compositions hardenable by exposure to heat or electromagnetic radiation are provided by dissolving together to form a blend from about 0% to about 50% by weight of an uncrosslinked polymer, from about 2% to about 30% of a polymerizable monomer, from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters of from 0.001 micron to about 500 microns and being swollen in said solution and from about 20% to about 70% of a crosslinking agent for said monomer. Such compositions exhibit superior chemical and physical characteristics when hardened and are suitable in a wide variety of applications as construction media. Such compositions are especially suitable in the production of prosthetic dental appliances, such as, for example, prosthetic teeth. It is believed that the hardening of such compositions as, for example, during the preparation of dental appliances forms a polymer system known as an interpenetrating polymer network.
Inventors
- 👤 Louis Tateosian
- 👤 Frederick D. Roemer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 04:47
CPC Classifications
A; A61; A61K; A61K6/00; C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; A61K6/80; A61K6/884; A61K6/887; C08F291/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
98 words
A hardenable composition comprising a blend of: (A) from 0% to about 50% of an uncrosslinked polymer soluble in the blend; (B) from about 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swellable in said blend; and (D) from about 20% to about 70% of a crosslinking agent for said monomer; said percentages being based upon the total weight of A, B, C and D in said composition.
Claim 2
Dependent Claim
98 words
A hardenable composition comprising a blend of: (A) from 0% to about 50% of an uncrosslinked polymer soluble in the blend; (B) from about 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swellable in said blend; and (D) from about 20% to about 70% of a crosslinking agent for said monomer; said percentages being based upon the total weight of A, B, C and D in said composition.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein said crosslinked polymer is present in an amount of from about 40% to about 60% by weight.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein said polymerizable monomer is present in an amount of from about 2% to.about 5% by weight.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said crosslinking agent is present in an amount of from about 40% to about 60% by weight.
Claim 6
Dependent Claim
22 words
The composition of claim 1 wherein at least about 50% by weight of said particles have average diameters below about 150 microns.
Claim 7
Dependent Claim
74 words
The composition of claim 1 wherein said crosslinked polymer is present in an amount of from about 40% to about 60% by weight, said polymerizable monomer is present in an amount of from about 2% to about 5% by weight, said crosslinking agent is present in an amount of from about 40% to about 60% by weight, and at least about 50% by weight of said particles have average diameters below about 150 microns.
Claim 8
Dependent Claim
45 words
The composition of claims 1, 4, 5 or 6 wherein said crosslinking agent is selected from the group consisting of 2,2-bis(methacryloxyphenyl)propane; ethylene "glycol" dimethacrylate; ethylene "glycol" diacrylate; 2,2-bis[4-(2-hydroxy-3-methacry- loxy-propoxy)phenyl]propane; and the reaction product of either hydroxyethyl acrylate, hydroxypropyl acrylate and their methacrylic homologs with 2,2,4-trimethylhexyl-l,6-diisocyanate.
Claim 9
Dependent Claim
33 words
The composition of claims 1, 5 or 6 further comprising one or more members selected from the group consisting of free radical initiators, photochemical initiators, activators, pigments, fillers, adhesion modifiers and radiopaquing agents.
Claim 10
Dependent Claim
25 words
The composition of claim ' 8 wherein said blend is admixed with particulate inorganic filler in weight ratios of from about 1:2 to about 2:1.
Claim 11
Dependent Claim
157 words
A process for producing a shaped article comprising: mixing together a blend comprising: (A) from 0 to about 50% of an uncrosslinked polymer soluble in the blend; (B) from about 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swellable in said blend; and (D). from about 20% to about 70% of a crosslinking agent for said monomer; said percentages being based upon the total weight of A, B, C, and D; maintaining said components in association with one another in said blend for a period of time sufficient to substantially fully swell said particles with the mixture of said monomer and said crosslinking agent; shaping said blend; and exposing said blend to heat or to electromagnetic radiation to harden said blend and to provide said shaped article.
Claim 12
Dependent Claim
157 words
A process for producing a shaped article comprising: mixing together a blend comprising: (A) from 0 to about 50% of an uncrosslinked polymer soluble in the blend; (B) from about 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swellable in said blend; and (D). from about 20% to about 70% of a crosslinking agent for said monomer; said percentages being based upon the total weight of A, B, C, and D; maintaining said components in association with one another in said blend for a period of time sufficient to substantially fully swell said particles with the mixture of said monomer and said crosslinking agent; shaping said blend; and exposing said blend to heat or to electromagnetic radiation to harden said blend and to provide said shaped article.
Claim 13
Dependent Claim
23 words
The process of claim 10 wherein said crosslinked polymer is present in an amount of from about 40% to about 60% by weight.
Claim 14
Dependent Claim
23 words
The process of claim 10 wherein said polymerizable monomer is present in an amount of from about 2% to about 5% by weight.
Claim 15
Dependent Claim
23 words
The process of claim 10 wherein said crosslinking agent is present in an amount of from about 40% to about 60% by weight.
Claim 16
Dependent Claim
24 words
( 14. The process of claim 10 wherein at least about 50% by weight of said particles have average diameters below about 150 microns.
Claim 17
Dependent Claim
75 words
The process of claim 10 wherein said crosslinked . polymer is present in an amount of from about 40% to about 60% by weight, said polymerizable monomer is present in an amount of from about 2% to about 5% by weight, said crosslinking agent is present in an amount of from about 40% to about 60% by weight, and at least about 50% by weight of said particles have average diameters below about 150 microns.
Claim 18
Dependent Claim
46 words
The process of claims 10, 13, 14 or 15 wherein said crosslinking agent is selected from the group consisting of 2,2-bis(methacryloxyphenyl)propane; ethylene "glycol" dimethacrylate; ethylene "glycol" diacrylate; 2,2-bis [4-(2-hydroxy-3-methacryloxypropoxy)phenyl] propane; and the reaction product of either hydroxyethyl acrylate, hydroxypropyl acrylate and the methacrylate homologs with 2,2,4-trimethylhexyl-1,6-diisocyanate.
Claim 19
Dependent Claim
33 words
The process of claims 10, 14 or 15 further comprising one or more members selected from the group consisting of free radical initiators, photochemical initiators, activators, pigments, fillers, adhesion modifiers and radiopaquing agents.
Claim 20
Dependent Claim
24 words
The process or claim 17 wherein said blend is admixed with particulate inorganic filler in weight ratios of from about 1:2 to about 2:1.
Claim 21
Dependent Claim
105 words
A dental appliance comprising a shaped body having at least one portion comprising a polymerized blend of: (A) from 0% to about 50% of an uncrosslinked polymer soluble in said blend; (B) from 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swollen in said blend, and . (D) from about 20% to about 70% of a crosslinking agent for said monomer, said percentages being based upon the total weight of A, B, C, and D.
Claim 22
Dependent Claim
105 words
A dental appliance comprising a shaped body having at least one portion comprising a polymerized blend of: (A) from 0% to about 50% of an uncrosslinked polymer soluble in said blend; (B) from 2% to about 30% of a polymerizable monomer; (C) from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters from about 0.001 micron to about 500 microns and being swollen in said blend, and . (D) from about 20% to about 70% of a crosslinking agent for said monomer, said percentages being based upon the total weight of A, B, C, and D.
Claim 23
Dependent Claim
21 words
The appliance of claim 19 wherein said crosslinked polymer is present in an.amount of.from about 40% to about 60% by weight.
Claim 24
Dependent Claim
23 words
The appliance of claim 19 wherein said polymerizable monomer is present in an amount of from about 2% to about 5% by weight.
Claim 25
Dependent Claim
23 words
The appliance of claim 19 wherein said crosslinking agent is present in an amount of from about 40% to about 60% by weight.
Claim 26
Dependent Claim
21 words
The appliance of claim 19 wherein at least 50% by weight of said particles have average diameters below about 150 microns.
Claim 27
Dependent Claim
71 words
The appliance of claim 19 wherein said crosslinked polymer is present in an amount of about 40% to about 60% by weight, said polymerizable monomer is present in an amount of from about 2% to about 5% by weight, said crosslinking agent'is present in an amount of from about 40% to about 60% by weight, and at least 50% by weight of said particles have average diameters below about 150 microns.
Claim 28
Dependent Claim
45 words
The appliance of claims 19, 22, 23 or 24 wherein said crosslinking agent is selected from the group consisting of 2,2-bis(methacryloxyphenyl)propane; ethylene "glycol" dimethacrylate; ethylene "glycol" diacrylate; 2,2-bis[4-(2-hydroxy-3-metha- cryloxypropoxy)phenyl] propane; and the reaction product of either hydroxyethyl acrylate,hydroxypropyl acrylate and their methacrylate homologs and 2,2,4-trimethylhexyl-1,6-diisocyanate.'
Claim 29
Dependent Claim
32 words
The appliance of claims 19, 23 or 24 further comprising one-or more members selected from the group consisting of free radical initiators, photochemical initiators,. activators, pigments, fillers, adhesion modifiers and radiopaquing agents.
Claim 30
Dependent Claim
24 words
The appliance of claim 26 wherein said blend is admixed with particulate inorganic filler in weight ratios of from about 1:2 to about 2:1.
Claim 31
Dependent Claim
26 words
The appliance of claim 19, 23 or 24 wherein said appliance exhibits the structure of an interpenetrating polymeric network at least locally interior to said portion.
Claim 32
Dependent Claim
23 words
The appliance of claim 27 wherein said appliance exhibits the structure of an interpenetrating polymeric network at least locally interior to said portion.
References Cited (Backward Citations)
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