National Starch and Chemical Investment Holding Corporation

George L Gallaway

Rama S Chandran

Paul B Foreman

In a process for the homogeneous polymerization of water insoluble polymers containing greater than 50% by weight of monomers selected from the group consisting of C.sub.1 -C.sub.18 acrylate or methacrylate esters, N-substituted acryl or methacrylamides and mixtures thereof in substantially non-aqueous organic solutions, the improvement which comprises using as the polymerization initiator a water soluble initiator dissolved in sufficient amount of water to dissolve the initiator whereby the resultant polymer is characterized by lower residual monomer levels than are obtained using equivalent amounts of water-insoluble initiators.

Solution polymerization of vinyl monomers with water soluble initiators

This invention is a method of providing a pressure sensitive adhesive having a rapid or fast curing rate along with other suitable adhesive properties and comprises forming the adhesive by reaction of an interpolymer of an alkyl acrylate, ethylenically unsaturated monomer containing one or more carboxylic acid groups and vinyl acetate, with the interpolymer being formed by the slow addition of a uniform mixture of the components and then being reacted with a chelated metal alkoxide.

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Asbury, NJ, United States of America

George L Gallaway