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US 5,290,602 AGranted
Hindered-hydroxyl functional (meth) acrylate-containing copolymers particularly suitable for use in coating compositions which are sprayed with compressed fluids as viscosity reducing diluents
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsJohn N. Argyropoulos, Brian L. Hilker
Life of this patent
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Abstract
The present invention relates to copolymers which are particularly suitable in coating compositions which are sprayed with compressed fluids which act as viscosity reducing diluents.
Claims20
A process for reducing the viscosity of a composition containing one or more copolymers comprising forming a liquid mixture in a closed system comprising:
- a) a composition containing at least one or more copolymers comprising the reaction product of (a) one or more hindered-hydroxyl functional (meth)acrylate monomers and (b) at least one other monomer copolymerizable therewith, said copolymer having (i) a number average molecular weight of less than about 12,000, (ii) a glass transition temperature of from -30.degree. C. to about 100.degree. C., and (iii) a styrene concentration of from 0 to less than about 20 weight percent, and said hindered-hydroxyl functional (meth)acrylate monomer having a diacrylate content of less than about 5 weight percent;
- and
- b) at least one compressed fluid in at least an amount which when added to (a) is sufficient to render the viscosity of said mixture to a point suitable for being transportable, wherein the compressed fluid is a gas at standard conditions of 0.degree. C. and one atomosphere (STP).
A process for the liquid spray application of coatings to a substrate containing one or more copolymers which comprises:
- a) forming a liquid mixture in a closed system, said liquid mixture comprising:
- i) at least one or more copolymers comprising the reaction product of (a) one or more hindered-hydroxyl functional (meth)acrylate monomers and (b) at least one other monomer copolymerizable therewith, said copolymer having (i) a number average molecular weight of less than about 12,000, (ii) a glass transition temperature of from -30.degree. C. to about 100.degree. C., and (iii) a styrene concentration of from 0 to less than about 20 weight percent, and said hindered-hydroxyl functional (meth)acrylate monomer having a diacrylate content of less than about 5 weight percent;
- and
- ii) at least one compressed fluid in at least an amount which when added to (i) is sufficient to render the viscosity of said mixture to a point suitable for spray application, wherin the compressed fluid is a gas at standard conditions of 0.degree. C. and one atmosphere (STP);
- and
- b) spraying said liquid mixture onto a substrate to form a liquid coating thereon.
3 more elements
Dependencies are inferred from the claim text.