Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-08-15
1979-04-24
Griffin, Ronald W.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 23H, C08F 614, C08F 1808, C08J 318, C08J 320
Patent
active
041511352
ABSTRACT:
Processes are disclosed for comminuting and recovering as dry powders tacky ethylene-vinyl acetate (EVA) copolymers and tacky partially-hydrolyzed ethylene-vinyl acetate (HEVA) copolymers. The copolymers are comminuted by dispersion in water with an alkali metal soap of a higher carboxylic acid. Chemical conversion of the soap after dispersion to the alkaline earth metal soap or to the higher carboxylic acid permits recovery of the tacky copolymers as dry powders. The compaction resistance of the higher carboxylic acid-coated particles is improved by chemically converting deposited acid to the alkaline earth metal soap or by adding supplemental preformed alkaline earth metal soap.
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Griffin Ronald W.
National Distillers and Chemical Corporation
Tremain Kenneth D.
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