Thixotropic paint compositions containing hydrophobic starch derivatives
US6001927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B31/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Latex paint compositions containing water, pigment and a latex wherein the latex is prepared by emulsion polymerization of at least one ethylenically unsaturated monomer in the presence of 0.1 to 0.2 pphm of at least one hydrophobically modified starch having the structure ##STR1## In the above structure, St is a starch base material, R.sup.1 is a dimethylene or trimethylene group, R.sup.2 is selected from the group consisting of alkyl, alkenyl, aralkyl and aralkenyl groups having 2 to 20 carbon atoms, and Y is selected from the group consisting of hydrogen, alkali metal, alkaline earth metal and ammonium. The hydrophobically modified starch is the reaction product of starch and an anhydride moiety and provides the latex paint with improved rheological properties and allows for easier spreading and less dripping of paint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.