Coatings containing starch esters
US4095992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1976 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Dec 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D103/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is directed to mixed esters of starch and to the method of preparing and the use of said starch esters which are derived from (a) low molecular weight hydrolyzed starch having a plurality of anhydroglucose units and (b) at least about 0.5 mole of a cylating agent per anhydroglucose unit consisting of mono- and polycarboxylic acid anhydrides and acyl halides. These anionic esters of starch with average molecular weights ranging up to 100,000 are characterized as having a high degree of substitution, i.e. ranging up to 3.0 wherein at least about 0.1 of the total degree of substitution consist of ester groups having pendant carboxyl radicals derived from anhydrides of polycarboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.