Title:
DISPERSION STABILIZER ASSISTANT FOR SUSPENSION POLYMERIZATION OF VINYL COMPOUND
Document Type and Number:
WIPO Patent Application WO/2007/069422
Kind Code:
A1
Abstract:
Disclosed is a dispersion stabilizer assistant for suspension polymerization
of a vinyl compound. The dispersion stabilizer assistant is composed of an aqueous
solution containing a partially saponified polyvinyl alcohol polymer having
an average saponification degree of less than 70 mol% and an average polymerization
degree of 650 or less, and a compound represented by the general formula (I) below
or a nonionic hydrophilic surfactant. When an aqueous solution of the dispersion
stabilizer assistant for suspension polymerization is prepared, generation
of foam due to the partially saponified polyvinyl alcohol polymer is suppressed,
thereby preventing precipitation of the partially saponified polyvinyl alcohol
polymer. Consequently, the dispersion stabilizer assistant for suspension
polymerization is excellent in long-term storage stability. (I) (In the formula,
R1, R2 and R5 independently represent a hydrogen
atom or an alkyl group having 1-6 carbon atoms; R3 represents a hydrogen
atom, an alkyl group having 1-6 carbon atoms or a hydroxyalkyl group having 1-6
carbon atoms; R4 represents a hydrogen atom, a hydroxyl group or an
alkoxyl group having 1-6 carbon atoms; and n represents an integer of 1-6.)
Inventors:
KATO MASAKI (JP)
NAKAMAE MASATO (JP)
NAKAMAE MASATO (JP)
Application Number:
PCT/JP2006/322725
Publication Date:
June 21, 2007
Filing Date:
November 15, 2006
Export Citation:
Assignee:
KURARAY CO (JP)
KATO MASAKI (JP)
NAKAMAE MASATO (JP)
KATO MASAKI (JP)
NAKAMAE MASATO (JP)
International Classes:
C09K23/38; C08F2/20; C09K23/42; C09K23/52
Foreign References:
| JPH07286003A | 1995-10-31 | |||
| JP2005350557A | 2005-12-22 | |||
| JPH04154810A | 1992-05-27 | |||
| JPS56167745A | 1981-12-23 | |||
| JPH093106A | 1997-01-07 | |||
| JP2000319334A | 2000-11-21 | |||
| JP2005298750A | 2005-10-27 | |||
| JP2004002644A | 2004-01-08 | |||
| JP2003128709A | 2003-05-08 | |||
| JP2000159823A | 2000-06-13 | |||
| JPH10259213A | 1998-09-29 |
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