C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1338, 400/30
C08F 2/20 (2006.01) C08F 2/30 (2006.01)
Patent
CA 1152665
ABSTRACT Sterically stabilised dispersions of polymer particles of size 0.1 - 10 microns in an aqueous medium are obtained by free radical-initiated polymerisation in the aqueous medium of ethylenically unsaturated monomer at a temperature at least 10°C higher than the glass transition temperature of the polymer to be formed, in the presence as steric stabiliser of a block or graft copolymer of defined characteristics, the aqueous medium being one which is capable of dissolving the monomer to the extent of at least 3% by weight but which is a non- solvent for the polymer formed the conditions being such that at no time is there present a separate phase of free monomer and the resulting dispersion containing at least 20% by weight of polymer. The dispersions can be formulated into aqueous coating compositions having improved properties.
341497
Graetz Clive W.
Thompson Morice W.
Waite Frederick A.
Waters Julian A.
Dulux Australia Limited
Imperial Chemical Industries Limited
Roussin Bernard F.
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