Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1995-02-17
1996-10-29
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, 528487, 528488, 524498, 521 41, 5262383, 210650, C08F 326, C08C 104, C08C 200, B01D 7124
Patent
active
055697402
ABSTRACT:
There are provided a deproteinized natural rubber latex which comprises a purified product of proteolytically treated natural rubber latex and contains fine particles of natural rubber latex, a deproteinized natural rubber which comprises a dehydrated product of the deproteinized natural rubber latex, and a process for the production of deproteinized natural rubber latex which comprises subjecting a latex solution prepared by (1) adding water and/or a surfactant to a natural rubber latex and then proteolytically treating the resulting latex solution or (2) proteolytically treating a natural rubber latex and then adding water and/or a surfactant to the treated natural rubber latex, to purification using a rotary plate membrane separation apparatus. The deproteinized natural rubber latex contains substantially no protein, is excellent in film-forming property, and provides a raw rubber film having excellent green strength, and the process can produce the deproteinized natural rubber latex in a high yield with high production efficiency.
REFERENCES:
patent: 2061276 (1936-11-01), Ingmanson
patent: 2097481 (1937-11-01), Wallerstein
patent: 2399156 (1946-04-01), Stamberger
patent: 4160726 (1979-07-01), DelPico
Hayashi Masaharu
Ikeda Kenichi
Kanamaru Eiji
Kuga Akihito
Nakade Shinichi
Asinovsky Olga
Kao Corporation
Michl Paul R.
Nitto Denko Corporation
Sumitomo Rubber Industries Ltd.
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