Dispersing stabilizer
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United States of America Patent
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Dec 15, 1998
Issued Date -
N/A
app pub date -
Apr 23, 1997
filing date -
Nov 7, 1986
priority date (Note) -
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status (Latency Note)
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Abstract
A dispersing stabilizer including (A) a polyvinyl alcohol resin containing oxyalkylene groups and having a surface tension of 35 to 55 dyne/cm at 20.degree. C. as a 1% by weight aqueous solution, or said resin and (B) a water-soluble polymer or a polyvinyl alcohol resin having a low degree of hydrolysis and a low degree of polymerization. When using the dispersing stabilizer of the present invention, both of a porosity and a bulk density of a polyvinyl resin particle can be improved at the same time, and, in addition, a distribution of particle size and a uniformity of porosity can be further improved.
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