Polychloroprene-tackifying resin dispersions

Details Polychloroprene-tackifying resin dispersions Polychloroprene-tackifying resin dispersions

C - Chemistry, Metallurgy

08

L

400/5181

C08L 11/02 (2006.01) C08F 236/16 (2006.01) C08F 236/18 (2006.01) C08F 283/00 (2006.01) C09J 113/02 (2006.01)

Patent

CA 1037179

ABSTRACT OF THE DISCLOSURE A process is provided for making novel chloroprene- unsaturated carboxylic acid copolymer latexes having tackifying resin intimately dispersed therein, the latexes having characteristics making them especially suitable for use in nonsolvent adhesives. The process includes the steps of (1) preparing a water-immiscible solution containing the chloroprene monomer, an alpha,beta-unsaturated carboxylic acid monomer, and a tackifying resin, (2) emulsifying this solution in water containing polyvinyl alcohol, and (3) copolymerizing the monomers in the emulsion so formed; the chloroprene-carboxylic acid mixture of step (1) containing 0.4-10 mole percent of the carboxylic acid based on the total of chloroprene plus carboxylic acid and the tackifying resin being present in said mixture in the proportion of 5-75 parts, and the polyvinyl alcohol (PVA) being present in step (2) in the proportion of 2-10 parts, all of said proportions being by weight per 100 parts of total chloroprene plus carboxylic acid monomer.

201065

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