Claims
- 1. A method of producing essentially haze-free isophthalic acid-and polymethylolalkanoic acid-containing resins comprising:
- reacting isophthalic acid, a polymethylolalkanoic acid, and a polyol in the presence of a catalytically effective amount of a catalyst selected from the group consisting of stannous oxalate, dibutyltin oxide, and tetrabutyl titanate at a temperature of between about 150.degree. C. and 230.degree. C. to produce essentially haze-free resins having an acid number of at least about 30.
- 2. The method of claim 1 wherein the polymethylolalkanoic acid is selected from the group consisting of dimethylolpropionic acid, dimethylolbutyric acid, dimethylolvaleric acid, trimethylolacetic acid, and blends thereof.
- 3. The method of claim 2 wherein the polymethylolalkanoic acid is dimethylolpropionic acid.
- 4. The method of claim 2 wherein the amount of catalyst is up to about 1 wt percent based on total weight of reactants.
- 5. The method of claim 2 further comprising continuing said reaction until the resin viscosity, determined on an ICI cone and plate viscometer at 125.degree. C. and 100 percent solids, is at least about 10 poise.
- 6. The method of claim 5 wherein the viscosity is at least about 20 poise.
- 7. The method of claim 3 further comprising continuing said reaction until the resin viscosity, determined on an ICI cone and plate viscometer at 125.degree. C. and 100 percent solids, is at least about 10 poise.
- 8. The method of claim 7 wherein the viscosity is at least about 20 poise.
- 9. The method of claim 1 wherein the acid number of the resin is between about 30 and 75.
- 10. The method of claim 1 wherein the resin is further reacted with ammonium hydroxide or an amine to improve the water solubility of the resin.
- 11. The method of claim 2 wherein the resin is further reacted with ammonium hydroxide or an amine to improve the water solubility of the resin.
- 12. The method of claim 5 wherein the resin is further reacted with ammonium hydroxide or an amine to improve the water solubility of the resin.
- 13. The essentially haze-free ester produced by the method of claim 1.
- 14. The essentially haze-free ester produced by the method of claim 2.
- 15. The essentially haze-free ester produced by the method of claim 7.
- 16. The essentially haze-free ester produced by the method of claim 5.
- 17. The essentially haze-free ester produced by the method of claim 12.
- 18. Protective coating compositions comprising the resin of claim 14.
- 19. Protective coating compositions comprising the resin of claim 16.
- 20. Protective coating compositions comprising the resin of claim 17.
- 21. Objects coated with the composition of claim 18.
- 22. Objects coated with the composition of claim 19.
- 23. Objects coated with the composition of claim 20.
Parent Case Info
This application is a continuation of application Ser. No. 149,842, filed Jan. 29, 1988, now abandoned.
US Referenced Citations (30)
Non-Patent Literature Citations (2)
Entry |
W. J. Van Westrenen, "Modern Developments in Aqueous Industrial Coatings", 62 J. Oil Col. Chem. Assoc., 246-255, (1979). |
IMC/Pitman-Moore, "A Complete Guide To DMPA Brand of Dimethylopropionic Acid", revised Edition 1987. |
Continuations (1)
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Number |
Date |
Country |
Parent |
149842 |
Jan 1988 |
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