Modified chlorinated polyolefins, aqueous dispersions thereof and their use in coating compositions
AssigneePPG Industries, Inc.
InventorsJonathan T. Martz, Christopher A. Verardi, Shanti Swarup
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Abstract
Modified chlorinated polyolefins obtained by heating the chlorinated polyolefin with a hydrocarbon acid having at least 7 carbon atoms in the presence of a free radical initiator are disclosed. The modified chlorinated polyolefins can be formulated into aqueous dispersions and coated onto plastic substrates to improve the adhesion of subsequently applied coatings.
Claims30
An aqueous dispersion comprising water, a coalescing solvent, and a dispersed resinous phase comprising:
- (a) about 20 to about 100% by weight of an at least partially neutralized modified chlorinated polyolefin obtained by heating a chlorinated polyolefin with a hydrocarbon acid having at least 7 carbon atoms in the presence of a free radical initiator, said modified chlorinated polyolefin dispersed in water with an organic cosolvent;
- (b) about 0 to about 40% by weight of a water-reducible urethane resin;
- and
- (c) about 0 to about 40% by weight of an acrylic latex;
- wherein the weight percentages are based on total weight of resin solids.
A method of coating a plastic substrate surface which comprises applying an aqueous dispersion to the surface of the substrate, wherein the aqueous dispersion comprises water, a coalescing solvent, and a dispersed resinous phase comprising:
- (a) about 20 to about 100% by weight of an at least partially neutralized modified chlorinated polyolefin obtained by heating a chlorinated polyolefin with a hydrocarbon acid having at least 7 carbon atoms in the presence of a free radical initiator, said modified chlorinated polyolefin dispersed in water with an organic cosolvent;
- (b) about 0 to about 40% by weight of a water-reducible urethane resin;
- and
- (c) about 0 to about 40% by weight of an acrylic latex;
- wherein the weight percentages are based on total weight of resin solids.
Dependencies are inferred from the claim text.