Surfactant-free polymer emulsion coating composition and method

Details Surfactant-free polymer emulsion coating composition and method Surfactant-free polymer emulsion coating composition and method

1977-08-19

1979-04-24

Welsh, Maurice J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296WB, C08L 3302

Patent

active

041511433

ABSTRACT:
Surfactant-free emulsion coating compositions of superior film-forming properties are produced by a two-stage method comprising, in a first stage, forming a mixture of polymerizable monomers comprises of defined proportions of a carboxylic acid monomer, such as acrylic acid, and a C.sub.1 -C.sub.8 alkyl acrylate or methacrylate, polymerizaing said mixture, neutralizing the polymer product with a sufficient amount of an amine or base to make it water-dispersible and forming an emulsion of the polymer with water, then, in a second stage, forming a mixture of polymerizable monomers comprised of defined proportions of a C.sub.1 -C.sub.8 alkyl acrylate or methacrylate and adding this monomer mixture and a polymerization catalyst to the emulsion produced in said first stage and heating the mixture thus formed to effect polymerization and produce the emulsion coating composition. The method produces an emulsion comprised of polymers of higher molecular weight than producible by conventional emulsion coating forming means and without the use of a surfactant as done conventionally.

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