Preparation of latexes by direct dispersion of acidic organic polymers into aqueous alkaline media
Abstract
Abstract SYNTHETIC LATEXES AND AQUEOUS COLLOIDAL DISPERSIONS, FREE OF ADDED EXTERNAL SURFACTANTS AND EMULSIFIERS, ARE MADE FROM NORMALLY SOLIDS, WATER- AND ALKALI-INSOLUBLE THERMOPLASTIC ORGANIC ADDITION POLYMERS CONTAINING PLURALITY OF ACID GROUPS IN THE POLYMER STRUCTURE AND WHICH ARE IN NON-COLLOIDAL MASSIVE FORM BY DIGESTING THE POLYMER IN ADMIXTURE WITH AN EVELOPING ALKALINE AQEOUS LIQUID MEDIUM UNTIL THE POLYMER SPONTANEOUSLY CONVERTS INTO COLLOIDAL PARTICLES IN THE AQUEOUS MEDIUM. IN AN EXAMPLE, A SOLID THERMOPLASTIC TERNARY COPOLYMER OF ETHYLENE, 11.2% BY WEIGHT ETHYL ACRYLATE, AND 11% BY WEIGHT ACRYLIC ACID, IN THE FORM OF MOLDING GRANULES, WAS CONVERTED TO LATEX FORM BY DIGESTION IN AQUEOUS AMMONIA OR IN AQUEOUS POTASSIUM HYDROXDE. THE RESULTING DISPERSIONS ARE USEFUL IN IMPREGNATING, COATING AND ADHESIVE COMPOSITIONS.
Inventors
- 👤 J Louch
- 👤 Cann G Mc
- 👤 E Dumitru
Bibliographic Details
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