Interox Chemicals Limited

Charles Frederick Cardy

Stephen Arthur Lee

Polyfunctional viscoelastic liquid compounds having molecular weights of at least 25,000 and preferably from 40,000 to 10 million comprise vinyl polymers having adducted thereon a plurality of groups, the same or different, the adducted groups having the general formula

Compositions comprising visco-elastic liquid compounds

A process for the preparation of cast urethane rubbers by the reaction together of a diisocyanate, a polyol and a chain extender wherein the urethane is prepared by reacting together an isocyanate-rich quasi-prepolymer and an hydroxyl-rich prepolymer. The said quasi-prepolymer is formed by reacting all of the di-isocyanate with a part of the polyol and the said hydroxyl-rich prepolymer is formed by reacting all of the chain extender, the remaining part of the polyol and a part of the said quasi-prepolymer. The cast urethane rubbers find use in demanding applications like solid tires.

Process for preparing poly(.epsilon.-caprolactone) polyurethanes

This invention relates to a method of preparing polyurethane foam which comprises the steps of forming an isocyanate-terminated prepolymer by reacting a polyisocyanate with a copolymer having an --OH-functionality greater than 2.00 but less than 3.00 derived from an .epsilon.-caprolactone, an epoxide and a mixture polyhydric alcohol chain initiators; and reacting said prepolymer in the presence of a blowing agent and a catalyst with a reactant mixture which comprises a chain extending agent having at least two functional groups each containing an active hydrogen atom, dissolved in a liquid copolymer of a lactone and an epoxide. The polyurethane foams are useful in the manufacture of shoe soles.

Growing community of inventors

Luton, United Kingdom

Charles Frederick Cardy