Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1994-02-16
1996-05-07
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528486, 523352, 524156, 524161, C08L 3312, C08F 622
Patent
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., vol. 8, No. 199 (C-242), AN-82-200 359, JP-A-59 091 103, May 25, 1984.
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Hadano Wataru
Sato Haruki
Sugihara Masaki
Suzuki Fumio
Merriam Andrew E. C.
Michl Paul R.
Mitsubishi Rayon Co. Ltd.
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