A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
18/1170, 400/400
A61K 6/08 (2006.01) A61K 6/083 (2006.01) A61K 6/09 (2006.01) C08F 265/06 (2006.01) C08F 291/00 (2006.01) C08L 101/00 (2006.01)
Patent
CA 1173991
Abstract of the Disclosure Compositions hardenable by exposure to heat or elec- tromagnetic radiation are provided by blending from about 0% to about 50% by weight of an uncrosslinked polymer, from about 20% to about 66% of a polymerizable monomer capable of dissolving said polymer, 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 swellable by said monomer, and from about 0.25% to about 27% of a crosslinking agent for said monomer. Such compositions exhi- bit superior chemical and physical characteristics when hardened and are suitable in a wide variety of applications as construction media. In accordance with a preferred form of the invention, a precursor blend is formed from a mixture comprising (A) from 13 to 52 weight percent of a crosslinked polymer of an ester of a C1 - C6 alkyl acrylic acid and a C1 - C20 alkyl or cycloalkyl alcohol, said crosslinked polymer being in the form of fine particles at least 50% by weight of which have average diameters less than 150 microns; (8) from 13 to 34 weight percent of an uncrosslinked polymerized ester of a C1 - C6 alkyl acrylic acid and a C1 - C20 alkyl or cyclo- alkyl alcohol having an average molecular weight of from 500,000 to 900,000 g/mole; (C) from 25 to 55% by weight of a polymerizable monomeric ester of a C1 - C6 alkyl acrylic acid and a C1 - C20 alkyl or cycloalkyl alcohol, which monomeric ester is capable of dissolving said uncrosslinked polymerized ester and of swelling, or interpenetrating, said crosslinked polymer particles; and (D) from 7% to 22% by weight of a crosslinking agent for said polymerizable monomeric ester. Such precursor blends, after being aged for a time sufficient to insure that the crosslinked polymer particles have become substantially fully swollen with or interpenetrated by the mix- ture of monomeric ester and crosslinking agent, is especially suitable in the production of prosthetic dental appliances, such as, for example, prosthetic teeth.
344932
Roemer Frederick D.
Tateosian Louis H.
Dentsply International Inc.
Smart & Biggar
LandOfFree
Hardenable polymeric prosthesis compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hardenable polymeric prosthesis compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hardenable polymeric prosthesis compositions will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1185822