Compatible mixtures of modified starch and polyvinyl alcohol
Abstract
Abstract STARCH-POLYVINYL ALCOHOL (PVA) FORMULATIONS ARE PREPARED FROM AN ETHERIFIED DEPOLYMERIZED STARCH PRODUCT, WHICH CONSISTS ESSENTIALLY OF STARCH CONTAINING -COOX GROUPS, WHEREIN X IS A CATION SELECTED FROM NA+, K+, OR NH4+, IN THE AMOUNT OF 0.3 TO 3% BY WEIGHT BASED ON SAID PRODUCT OF -COONA, OR MOLAR EQUIVALENT OF -COOK OR -COONH4, SAID -COOX GROUPS BEING PRESENT AS STARCH -O-CH2-COOX, OR AS A MIXTURE OF STARCH -O-CH2-COOX AND STARCH -COOX, SAID MIXTURE CONTAINING AT LEAST 0.1% /COONA, OR MOLAR EQUIVALENT OF -COOK OR -COONH4, AS SAID STARCH-O-CH2-COOX, SAID STARCH PRODUCT BEING FURTHER CHARACTERIZED BY AN ALKALI FLUIDITY OF LESS THAN 95 AND ABOVE 5 AND BY BEING SUBSTANTIALLY FREE OF INORGANIC SALTS. THE FORMULATIONS OF THE STARCH PRODUCT WITH PVA ARE COMPATIBLE AND STABLE OVER A WIDE RANGE OF PROPORTIONS.
Inventors
- 👤 Erling Tormod Hjermstad
- 👤 Leonard James Coughlin
Bibliographic Details
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