Title:
AQUEOUS POLY(METH)ACRYLIC ACID (SALT) SOLUTION AND PROCESS FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2012/086716
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an aqueous poly(meth)acrylic acid (salt) solution which exhibits excellent dispersing properties for inorganic matter and dispersing properties with sufficient long-term stability. The present invention pertains to: an aqueous poly(meth)acrylic acid (salt) solution which contains a poly(meth)acrylic acid (salt) that is obtained by polymerization in the presence of a phosphorus compound including hypophosphorous acid (salt) and that has a weight-average molecular weight of 1000 to 10000, wherein the phosphorus compound has a phosphorous acid (salt) content of 0 to 0.3% by mass relative to 100% by mass of the phosphorus compound, and the inorganic anion content is 0 to 10000ppm; a process for preparing the aqueous poly(meth)acrylic acid (salt) solution, comprising a step characterized by polymerizing a monomer in an aqueous medium in the presence of a phosphorus compound including hypophosphorous acid (salt); a dispersant obtained by the process; and a dispersion of inorganic particles which contains at least 70% by mass of inorganic particles and which is produced by a process comprising a step of adding the aqueous poly(meth)acrylic acid (salt) solution to inorganic particles and then subjecting the resulting mixture to pulverization.
Inventors:
WAKAO NORIHIRO (JP)
KANZAKI AKIHIKO (JP)
CHOSA JUNICHI (JP)
KANZAKI AKIHIKO (JP)
CHOSA JUNICHI (JP)
Application Number:
PCT/JP2011/079708
Publication Date:
June 28, 2012
Filing Date:
December 21, 2011
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
WAKAO NORIHIRO (JP)
KANZAKI AKIHIKO (JP)
CHOSA JUNICHI (JP)
WAKAO NORIHIRO (JP)
KANZAKI AKIHIKO (JP)
CHOSA JUNICHI (JP)
International Classes:
C08F20/06; C08F2/38; C08K3/00; C08L33/02; C09C3/04; C09C3/10; C09D7/45; C09D17/00; C09K23/52
Domestic Patent References:
WO2011158945A1 | 2011-12-22 |
Foreign References:
JPH06287208A | 1994-10-11 | |||
JPH03121101A | 1991-05-23 | |||
JPH101512A | 1998-01-06 | |||
JPH06263803A | 1994-09-20 | |||
JP2009242598A | 2009-10-22 | |||
JP2000281959A | 2000-10-10 | |||
JP2000198809A | 2000-07-18 | |||
JPH11241066A | 1999-09-07 | |||
JP2002179704A | 2002-06-26 | |||
JP2009522189A | 2009-06-11 | |||
JPH03121101A | 1991-05-23 | |||
JP2000080396A | 2000-03-21 |
Other References:
See also references of EP 2657261A4
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
Patent business corporation Yasutomi international patent firm (JP)
Download PDF:
Claims:
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