Procedure for the manufacture of a mixture of starch and...

Details Procedure for the manufacture of a mixture of starch and... Procedure for the manufacture of a mixture of starch and...

C - Chemistry, Metallurgy

08

L

400/1351

C08L 3/00 (2006.01) C08J 3/00 (2006.01) C08J 3/05 (2006.01) C08L 3/02 (2006.01) C08L 29/04 (2006.01) D21H 17/28 (2006.01) D21H 17/36 (2006.01)

Patent

CA 2004308

- 1 - EXCERPT "Procedure for the manufacture of a mixture of starch and polyvinyl alcohol and thus manufactured mixture". to 95 parts by weight starch and 5 to 50 parts by weight polyvinyl alcohol with a degree of saponification between 87 and 100% are thoroughly mixed and furthermore the moisture content of the mixture is regulated between and 25 weight %. Subsequently the mixture obtained is subjected to a thermo-mechanical treatment at a temperature situated between 110 and 180°C. During the extrusion the mixture is subjected to shearing forces so that the product obtained when it is dispersed in cold water and subsequently is centrifuged, divides into a watery phase and a coacervate phase without a sediment of undissolved polyvinyl alcohol being formed.

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