Etherified depolymerized starch product compatible with polyvinyl alcohol
Abstract
Abstract AN ETHERIFIED DEPOLYMERIZED STARCH PRODUCT EXHIBITING COMPATIBILITY WITH AQUEOUS POLYVINYL ALCOHOL SOLUTIONS USEFUL FOR SIZE OR ADHESIVE APPLICATION, SAID STARCH PRODUCT CONSISTING ESSENTIALLY OF STARCH CONTAINING ACID SALT RADICALS SELECTED FROM -SO3X, OR SO3X AND -COOX, WHEREIN X IS A CATION SELECTED FROM NA+, K+, ORNH4+, IN THE AMOUNT OF .45 TO 4.5% BY WEIGHT BASED ON SAID PRODUCT OF -SO3NA, OR MOLAR EQUIVALENTS OF -SO3K, -SO3NH4, -COONA, -COOK, OR -COONH4, SAID -SO3X RADICAL BEING PRESENT IN ETHER-LINKED GROUPS CONTAINING FROM 2 TO 3 CARBONS, SAID MIXTURE CONTAINING AT LEAST .15% -SO3NA RADICALS, OR MOLAR EQUIVALENTS OF -SO3K OR -SO3NH4, SAID -COOX RADICALS BEING PRESENT AS STARCH-O-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.
Inventors
- 👤 Erling T Hjermstad
- 👤 Leonard J Coughlin
Bibliographic Details
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