Method for producing powdery and granular polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...

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528486, 523352, 524156, 524161, C08L 3312, C08F 622

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active

055147720

ABSTRACT:
A method for producing a powdery and granular polymer by two coagulation steps comprising coagulating a latex of the polymer, the latex containing a sulfuric acid ester series and/or sulfonic acid series anionic surface active agents, with an acid to an amount of the polymer of 40 to 80 wt. % at a first coagulation step, and then bringing coagulation to completion with an acid or salt at a second coagulation step. According to the present invention, a powdery and granular polymer having a sharp particle size distribution and a high bulk specific gravity can be obtained.

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Database WPI, Derwent Publications Ltd., AN 94-012303 02!, JP-A-5 320 221, Dec. 3, 1993.

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