Coatings containing starch esters

Details Coatings containing starch esters Coatings containing starch esters

1976-12-03

1978-06-20

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106214, 260 173, C08L 306

Patent

active

040959929

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.

REFERENCES:
patent: 3281411 (1966-10-01), Lemmerling
patent: 3379720 (1968-04-01), Reid
patent: 3732207 (1973-05-01), Kovats
patent: 4018959 (1977-04-01), Demko et al.

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