Copolymerization of unsaturated urethane monomers
AssigneeImperial Chemical Industries PLC
InventorsMichael L. Orton, William I. Spurr
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Abstract
Moulded plastics products are produced by in-mould copolymerization of methyl methacrylate with a polyurethane polyacrylate or polymethacrylate derived from a hydroxyalkyl acrylate or methacrylate by reaction of hydroxyl groups thereof with the isocyanate groups of a polyisocyanate or urethane polyisocyanate having isocyanate functionality greater than 2.0.
Claims24
A method of producing a moulded plastics product by in-mould copolymerisation of an unsaturated urethane compound and a vinyl monomer copolymerisable therewith, wherein
- (a) the unsaturated urethane compound is a polyurethane polyacrylate or polymethacrylate resin derived from a hydroxyalkyl acrylate or methacrylate by reaction of hydroxyl groups thereof with the isocyanate groups of a polyisocyanate from the group consisting of
- (i) polyisocyanates free from urethane groups and having an isocyanate functionality greater than 2.0 and
- (ii) urethane polyisocyanate derived from a polyisocyanate by reaction thereof with the hydroxyl groups of an aliphatic alcohol having up to 3 hydroxyl groups, the said urethane polyisocyanates having an isocyanate functionality greater than 2.0 and
- (b) the vinyl monomer is methyl methacrylate.
A polymerisable composition comprising an unsaturated urethane compound and a vinyl monomer copolymerisable therewith, wherein
- (a) the unsaturated urethane compound is a polyurethane polyacrylate or polymethacrylate resin derived from a hydroxyalkyl acrylate or methacrylate by reaction of hydroxyl groups thereof with the isocyanate groups of a polyisocyanate from the group consisting of
- (i) polymethylene polyphenyl polyisocyanates having an isocyanate functionality greater than 2.0 and
- (ii) urethane polyisocyanates derived from a polymethylene polyphenyl polyisocyanate by reaction thereof with the hydroxyl groups of an aliphatic alcohol having up to 3 hydroxyl groups, the said urethane polyisocyanates having an isocyanate functionality greater than 2.0 and
- (b) the vinyl monomer is methyl methacrylate.
A composition according to claim 18, wherein the composition also comprises an organic polymer.
Dependencies are inferred from the claim text.