Dental compositions

Assignee: Dentsply Sirona Inc

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Filing: 1982-01-12

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Granted: 1994-05-25

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Expires: 2002-01-12

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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 2026-11-08 23:17

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: 7

Claim 1

Independent Claim 93 words

A hardenable composition for a dental appliance comprising a blend of: (A) from 0% to 50% of an uncrosslinked polymer soluble in the blend; (B) from 2% to 5% of a polymerizable monomer; (C) from 40% to 60% of a crosslinked polymer in the form of discrete particles having average diameters from 0.001 µm to 500 µm and being swellable in said blend; and (D) from 40% to 60% 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 20 words

The composition of claim 1 wherein at least 50% by weight of said particles have average diameters below 150 µm.

Claim 3

Dependent Claim 24 words

The composition of claim 1 or 2 wherein said blend is admixed with particulate inorganic filler in weight ratios of from 1:2 to 2:1.

Claim 4

Dependent Claim 149 words

A process for producing a shaped dental appliance comprising: mixing together a blend comprising: (A) from 0 to 50% of an uncrosslinked polymer soluble in the blend; (B) from 2% to 5% of a polymerizable monomer; (C) from 40% to 60% of a crosslinked polymer in the form of discrete particles having average diameters from 0.001 µm to 500 µm and being swellable in said blend; and (D) from 40% to 60% 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 5

Dependent Claim 20 words

The process of claim 4 wherein at least 50% by weight of said particles have average diameters below 150 µm.

Claim 6

Dependent Claim 24 words

The process of claims 4 or 5 wherein said blend is admixed with particulate inorganic filler in weight ratios of from 1:2 to 2:1

Claim 7

Dependent Claim 13 words

A dental appliance obtainable by a process according to claims 4 to 6.

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