Poly[(vinyl alcohol)-CO-(vinyl amine)] copolymers as stabilizing protective colloids in aqueous emulsion polymerization
AssigneeAir Products and Chemicals, Inc.
InventorsRichard H. Bott, William E. Lenney, Keith D. Campbell, Jeffrey A. Kuphal, Chung-Ling Mao
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Abstract
A method for preparing aqueous polymer emulsions in the presence of a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer as a protective colloid and aqueous polymer emulsions containing a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer.
Claims29
In a method for preparing an aqueous polymer emulsion by the free radical aqueous emulsion polymerization of at least one ethyleneically unsaturated monomer in the presence of a stabilizing composition, the improvement which comprises using a stabilizing composition comprising the poly{(vinyl alcohol)-co-(vinyl amine)} copolymer.
In a method for preparing an aqueous polymer emulsion by the free radical aqueous emulsion polymerization of at least one ethylenically unsaturated monomer in the presence of a stabilizing composition, the improvement which comprises using a stabilizing composition consisting essentially of 0.5-20 wt %, based on total monomers, of a poly{(vinyl alcohol)-co-(vinyl amine)} copolymer and, optionally, an emulsifying agent and/or protective colloid, the poly{(vinyl alcohol)-co-(vinyl amine)} copolymer having the following formula ##STR3## where m=0-15 mole %,
- n=50-99 mole %,
- x=0-30 mole %, and
- y=0.1-50 mole %;
- and a Mw in the range of 10,000 to 200,000.
In an aqueous polymer emulsion comprising a polymer colloidally suspended in an aqueous medium, the improvement which comprises the polymer emulsion also containing a poly{(vinyl alcohol)-co-(vinyl amine)} copolymer.
Dependencies are inferred from the claim text.