Coating compositions containing oxidized ethylene-carbon monoxide copolymers as rheology modifiers
AssigneeAlliedSignal Inc.
InventorMichael Jablon
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Abstract
An improved coating composition having one or more polymeric binders dispersed in a liquid medium, wherein the improvement comprises an anti-sag and anti-settling effective amount of oxidized ethylene-carbon monoxide copolymer having an acid number as determined by standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises.
Claims22
An improved coating composition having one or more polymeric binders dispersed in a liquid medium wherein said one or more polymeric binders is selected from the group consisting of drying oils, alkyds, allylics, amino resins, epoxies, acrylics, phenolics, silicones, polyurethanes, coumarone indene resins, polamides, polycarbonates. polymers derived from the polymerization of .alpha.,.beta.-unsaturated monomers, vinyl polymers and copolymers, cellulosic polymers, and rubbers, wherein the improvement comprises an anti-sag and anti-settling effective amount of an oxidized ethylene-carbon monoxide copolymer having an acid number as determined by a standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises.
An improved coating composition having a pigment and one or more polymeric binders dispersed in a liquid medium, wherein the improvement comprises an anti-sag and anti-settling effective amount of an oxidized ethylene-carbon monoxide copolymer having an acid number as determined by a standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises.
A coating composition, comprising:
- (a) one or more polymeric binders dispersed in a liquid medium;
- (b) a pigment;
- and
- (c) about 0.5 to about 2.0 percent by weight of an oxidized ethylene-carbon monoxide copolymer having an acid number as determined by a standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises, wherein said composition has a sag resistance of at least about 7 mils, as measured according to ASTM D-4400 Method A, when dried at a temperature of about 20.degree. C.
A coating composition, comprising:
- (a) one or more polymeric binders dispersed in a liquid medium;
- (b) a pigment;
- and
- (c) about 0.5 to about 1.0 percent by weight of an oxidized ethylene-carbon monoxide copolymer having an acid number as determined by a standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises, wherein said composition has a low shear viscosity of about 1000 to about 10000 centipoises, as measured according to ASTM D-2196 Method A;
- a high shear viscosity of about 5 to about 30 poises, as measured according to ASTM D-4287;
- and has a sag resistance of at least about 7 mils, as measured according to ASTM D-4400 Method A, when dried at a temperature of about 20.degree. C.
A process for producing a paint composition, which comprises the following steps:
- (1) dispersing a rheological modifier in a liquid medium to form a gel, wherein said rheological modifier is oxidized ethylene-carbon monoxide copolymer having an acid number as determined by a standardized titration of KOH of between about 4 and about 30 and a Brookfield viscosity at a temperature of 140.degree. C. of between about 50 and about 800 centipoises;
- and
- (2) incorporating the gel into a paint composition.
Dependencies are inferred from the claim text.