Process for producing resin composition and process for producing molded article
AssigneeNational University Corporation Okayama University
InventorsJiro TANAKA, Kazuomi SUZUKI
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Abstract
A medical resin composition is produced by mixing a powder of a polymer (A) comprising repeating units having an ester group and a liquid of a vinyl ester monomer (B) having 6 or more carbon atoms to increase a viscosity and, according to demand, further performing a polymerization reaction. The thus produced resin composition inhibits leaching of irritative substances, reduces any adverse effects on the human body by endocrine disruptors, etc. and can be prepared with high operational efficiency. The resin composition is suitably used as a dental resin composition such as a tissue conditioner, a functional impression material, a lining material, a denture base material or a mouth piece material.
Claims8
A process for producing a molded article suitable for use in a dental application, the process comprising:
- mixing 100 parts by weight of a powder of a polymer (A) comprising repeating units having an ester group and having a weight average molecular weight of from 5,000 to 2,000,000, and from 20 to 200 parts by weight of a liquid of a vinyl ester monomer (B) having 6 or more carbon atoms and having a plurality of functional groups in the molecule to increase a viscosity, and
- molding the mixture after increasing the viscosity;
- wherein the powder of polymer (A) has an average particle diameter of from 2 to 200 μm,
- wherein the vinyl ester monomer (B) is a vinyl carboxylate monomer (B1),
- wherein the vinyl ester monomer (B) has two or more vinyl groups in the molecule, and
- wherein the mixture is installed in an oral cavity while being in a viscous fluid state, and the mixture changes into an elastomer.
Dependencies are inferred from the claim text.