Biocompatible mouldable polymeric material
AssigneeThe Secretary of State for Health in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorsMichael Braden, Allison O. Okpojo
Life of this patent
Estimating the term…
Abstract
A biocompatible moldable curable polymer/monomer system capable of curing at ambient temperatures to provide an elastomer product while producing a lower exotherm than previously used systems. The system includes an alkyl acrylate or methacrylate homopolymer or copolymer; a monomer mixture of higher alkylacrylate or methacrylate combined with one or more of acrylic acid, methacrylic acid and their lower alkyl esters; and a plasticizer and optionally cross-linking agents, anti-tack agents, and activators or photoinitiators. The moldable systems is a dough used for making earmoulds and earpieces or in fabrication of prostheses.
Claims32
A mouldable, curable polymer/monomer system comprising a polymer component, a monomer component and a plasticizer wherein
- (a) the polymer component comprises one or more polymers of molecular weight of from 300,000 to 2,000,000 which each comprise repeat units of one or both of formula I and formula II:
- ##STR4## wherein R.sup.1 and R.sup.3 are the same or different and are selected from the group consisting of H or methyl and R.sup.2 and R.sup.4 are the same or different and are selected from the group consisting of alkyl groups containing from 1 to 6 carbon atoms, wherein either R.sup.3 is different to R.sup.1 or R.sup.4 is different to R.sup.2 and;
- (b) the monomer component comprises 80 to 99% weight of a monomer of formula III:
- ##STR5## wherein R.sup.5 is H or methyl and R.sup.6 is an alkyl group of from 7 to 20 carbon atoms;
- together with from 1 to 20% weight of a monomer of formula IV:
- ##STR6## wherein R.sup.7 is H or methyl and R.sup.8 is selected from the group consisting of H and an alkyl group containing from 1 to 3 carbons.
Dependencies are inferred from the claim text.