초록 ▼

A continuous process for the preparation of water-soluble copolymers of vinyl carboxylic acids and lower alkyl acrylates is disclosed. The process employs a tubular reactor and polymerizes the monomers in aqueous solution in the presence of a free radical catalyst. Molecular weights of from 3,000-30

A continuous process for the preparation of water-soluble copolymers of vinyl carboxylic acids and lower alkyl acrylates is disclosed. The process employs a tubular reactor and polymerizes the monomers in aqueous solution in the presence of a free radical catalyst. Molecular weights of from 3,000-300,000 and preferably from about 5,000-25,000 are obtained utilizing this process.

대표청구항 ▼

A method for preparing copolymers of vinyl carboxylic acids and lower alkyl acrylates selected from the group consisting of methyl acrylate and ethyl acrylate, said vinyl carboxylic acids having the formula prior to polymerization: [Figure] wherein R is H or CH3 and A is selected from the group cons

A method for preparing copolymers of vinyl carboxylic acids and lower alkyl acrylates selected from the group consisting of methyl acrylate and ethyl acrylate, said vinyl carboxylic acids having the formula prior to polymerization: [Figure] wherein R is H or CH3 and A is selected from the group consisting of hydrogen, ammonium or alkali metal ions, said method comprising the steps of polymerizing an aqueous solution of the vinyl carboxylic acid with said lower alkyl acrylate in a tube reactor at a pressure of between 50-350 psig, said pressure being sufficient to maintain the reactants in a liquid state in the presence of a free radical catalyst while maintaining the conditions of the reaction within the limits set forth below: ________________________________