Aqueous compositions containing starch ester dispersants
US4061611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1976 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | Sep 22, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L3/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is directed to aqueous compositions and the process for preparing same and more specifically to aqueous coating compositions comprising polymeric resin binders and pigments dispersed in an aqueous system with starch ester dispersants. The dispersant consists of mixed esters of starch derived from (a) low molecular weight hydrolyzed starch having a plurality of anhydroglucose units or a derivative of said starch and (b) at least about 0.5 mole of acylating agent for each anhydroglucose unit of the hydrolyzed starch or its derivative. The acylating agent is a combination of anhydrides or acyl compounds consisting of (i) from about 0.1 to 2.9 moles of at least one anhydride of a polycarboxylic acid and (ii) from 0.1 to 2.9 moles of at least one compound selected from the class consisting of anhydrides of monocarboxylic acids and the acyl halides of monocarboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.