Claims
- 1. A coating composition consisting essentially of a curable thermosetting or thermoplastic resin and a flow-improving amount, sufficient to lower the surface tension of the coating such that the coating does not pull away from contaminants and thereby gives a smooth, level and generally defect-free coating, of a polymer composition derived from monomers consisting of
- (A) at least one acrylic ester, vinyl monomer or mixtures thereof, provided the acrylic ester is not a hydroxyalkyl acrylate,
- (B) at least one alpha-beta unsaturated carboxylic acid compound containing only one carboxylic acid group, and (C) at least one hydroxy-containing compound selected form hydroxyalkyl acrylates and compounds characterized by the formula
- HOR*SH
- wherein R* is a hydrocarbylene group containing from 2 to about 10 carbon atoms, or mixtures thereof.
- 2. The coating composition of claim 1 which comprises a thermosetting resin.
- 3. The coating composition of claim 1 which comprises a curable polyester or alkyd resin.
- 4. The coating composition of claim 1 which comprises a curable polyester resin.
- 5. The coating composition of claim 1 which comprises from about 0.1 to about 3% by weight of the polymer composition.
- 6. The coating composition of claim 1 wherein (A) is at least one acrylic ester characterized by the formula
- CH.sub.2 .dbd.C(R)COOR.sup.1 (I)
- wherein R is hydrogen or a lower alkyl group, and R.sup.1 is an alkyl group containing from 1 to about 24 carbon atoms.
- 7. The coating composition of claim 1 wherein (A) comprises a mixture of at least two acrylic esters characterized by the formula
- CH.sub.2 .dbd.C(R)COOR.sup.1 (I)
- wherein R is hydrogen or a lower alkyl group, and R.sup.1 is an alkyl group containing from 4 to about 24 carbon atoms.
- 8. The coating composition of claim 1 wherein (A) is a styrene monomer.
- 9. The coating composition of claim 1 wherein the alpha-beta unsaturated carboxylic acid compound (B) is characterized by the formulae
- CH.sub.2 .dbd.C(R)COOH (IIA)
- or
- HOOCC(R.sup.4).dbd.C(R.sup.4)COOR.sup.3 (IIB)
- wherein R is H or a lower alkyl group, R.sup.3 is an alkyl group containing from 1 to about 24 carbon atoms, and each R.sup.4 is independently H or methyl with the proviso that at least one R.sup.4 is H.
- 10. The coating composition of claim 9 wherein R.sup.3 is a lower alkyl group, and each R.sup.4 is H.
- 11. The coating composition of claim 1 wherein (C) is at least one hydroxyalkyl acrylate.
- 12. The coating composition of claim 11 wherein the hydroxyalkyl acrylate (C) is characterized by the formula
- CH.sub.2 .dbd.C(R)C(O)OR.sup.2 OH (III)
- wherein R is hydrogen or a lower alkyl group, and R.sup.2 is an alkylene group.
- 13. The coating composition of claim 12 wherein R.sup.2 is an alkylene group containing from 1 to 3 carbon atoms.
- 14. The coating composition of claim 12 wherein R is a methyl or ethyl group.
- 15. A coating composition consisting essentially of a curable polyester or an alkyd resin containing from about 0.1 to about 3% by weight of an acrylic polymer derived from monomers consisting of
- (A) from about 25 to about 86 mole percent of at least one acrylic ester characterized by the formula
- CH.sub.2 .dbd.C(R)COOR.sup.1
- wherein R is hydrogen or a lower alkyl group, and R.sup.1 is an alkyl group containing from 4 to about 24 carbon atoms,
- (B) from about 10 to about 50 mole percent of at least one alpha-beta unsaturated carboxylic acid compound containing only one carboxylic acid group and characterized by the formula
- CH.sub.2 .dbd.C(R)COOH
- or
- HOOCH.dbd.CHCOOR.sup.3
- wherein R is hydrogen or a lower alkyl group, and R.sup.3 is a lower alkyl group, and
- (C) from about 4 to about 25 mole percent of at least one hydroxyalkyl acrylate characterized by the formula
- CH.sub.2 .dbd.C(R)C(O)OR.sup.2 OH
- wherein R is hydrogen or a lower alkyl group, and R.sup.2 is an alkylene group containing from 1 to 3 carbon atoms.
- 16. The coating composition of claim 15 wherein (B) is present in an amount sufficient to provide an acrylic polymer having an acid value of from about 50 to about 150.
- 17. The coating composition of claim 15 wherein the resin is a polyester resin.
- 18. The coating composition of claim 15 wherein the acrylic ester (A) is a mixture comprising butyl acrylate and lauryl methacrylate.
Parent Case Info
This is a continuation of copending application Ser. No. 07/498,014, abandoned, filed on Mar. 23, 1990, which is a division of application Ser. No. 07/272,073, filed Nov. 16, 1988, abandoned.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
272073 |
Nov 1988 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
498014 |
Mar 1990 |
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