Process for producing rubbery polymer particle and process...

Details Process for producing rubbery polymer particle and process... Process for producing rubbery polymer particle and process...

2004-09-01

2009-02-03

Sellers, Robert (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S560000, C524S562000, C525S065000, C525S066000, C525S068000, C525S282000, C525S293000, C525S308000

Reexamination Certificate

active

07485680

ABSTRACT:
A process for efficiently producing an agglomerate resulting from removal of impurities from a water-base latex of rubbery polymer particles or dry Powder thereof and producing a dispersion having rubbery polymer particles dispersed in an organic solvent, and a process for efficiently producing a resin composition of low impurity content, in which the state of dispersion of rubbery polymer particles is excellent, from the above dispersion. In particular, a rubbery polymer particle agglomerate of low impurity content is obtained by first mixing a water-base latex of rubbery polymer particles with an organic solvent exhibiting partial solubility in water, bringing the resultant mixture into contact with water to thereby form a rubbery polymer particle agglomerate, and thereafter separating the water phase from the agglomerate/water phase mixture. Further, a resin composition of low impurity content having rubbe, polymer particles favorably dispersed is obtained by first adding an organic solvent to the above agglomerate, mixing the obtained dispersion with a polymerizable organic compound having a reactive group, such as an epoxy resin, and thereafter distilling off volatile components.

REFERENCES:
patent: 4778851 (1988-10-01), Henton et al.
patent: 4840991 (1989-06-01), Sekmakas
patent: 2007/0027233 (2007-02-01), Yamaguchi et al.
patent: 02-026716 (1990-01-01), None
patent: 3-26716 (1991-02-01), None
patent: 04-093340 (1992-03-01), None
patent: 2002-30122 (2002-01-01), None
patent: WO 03/022891 (2003-03-01), None

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