C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/6416
C08L 63/10 (2006.01) C08F 285/00 (2006.01)
Patent
CA 1042582
ABSTRACT OF THE DISCLOSURE Dispersions of hydroxy group useful in combination with cross- linking agents as a thermosetting coating composition and containing co- polymers in organic liquids, and process of making same are described. The dispersions comprise - (A) 10 - 30 percent by weight of a co-polymerizable polymer which is the reaction product of (1) a low molecular weight co-polymer of 80 - 94 percent by weight p-tertiary butyl styrene, and 4 - 12 percent by weight glycidylmethacrylate, and (2) 2 - 8 percent by weight (meth)acrylic acid or (meth)acrylic acid chloride or a mixture thereof, the sum of (1) and (2) being 100 percent; and (B) 70 - 90 percent by weight of co-polymerizable ethylenically unsaturated monomers, at least one of them carrying a functional hydroxy group, co-polymerized in an organic liquid which is a true solvent for component A, but the disperse co-polymer of A and B being substantially insoluble therein, wherein the organic liquid is a straight chain or branched chain aliphatic hydrocarbon, or a mixture thereof, having a boiling range of from 145 to 210°C. The dispersions are free from coagulates or seeding, precluding the need for the time-consuming filtration operations and the dispersions can be produced with a solids content of more than 50 percent and exhibit excellent stability and resistance to external influences.
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