PROCESS FOR PRODUCTION OF WATER-SOLUBLE POLYMERS AND USE THEREOF

WIPO Patent Application WO/2006/126674

A1

[PROBLEMS] To provide a process for the production of water -soluble polymers which are excellent in water solubility even when used in the form of powder and which serve as polymer flocculant and exert excellent flocculation performance against various substances such as inorganic salt-rich sludge or in the paper making step under high shear. [MEANS FOR SOLVING PROBLEMS] A process for the production of water-soluble polymers which comprises subjecting a monomer mixture consisting of (A) a radical-polymerizable water-soluble monomer and (B) a compound having two or more ethylenically unsaturated groups and having a content of the component (B) ranging from 3 x 10^-5 to 1 x 10^-3 mmol per gram of the total of the components (A) and (B) to aqueous solution polymerization to obtain a water-swollen gel of a water-insoluble polymer and applying mechanical shearing force to the water-swollen gel to convert the water-insoluble polymer into a water-soluble one.

JPS608244	[Title of the Invention] A vent method of a polymer of a VCM/PVC base, and a copolymer manufactured by mass polymerization
JP2003535202	INDUSTRIAL APPLICABILITY The thermoplastic molding composition having improved surface properties and improved structural homogeneity.
JP2001323011	METHOD FOR PURIFYING VINYL-BASED POLYMER

TSUZUKI TETSUYA (JP)
MORI YOSHIO (JP)
TAKEDA KEN (JP)
ADACHI KOICHI (JP)

PCT/JP2006/310554

November 30, 2006

May 26, 2006

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TOAGOSEI CO LTD (JP)
TSUZUKI TETSUYA (JP)
MORI YOSHIO (JP)
TAKEDA KEN (JP)
ADACHI KOICHI (JP)

C08F6/00; B01D21/01; C02F11/14; D21H17/37; D21H21/10

JPH05339381A	1993-12-21
JPH11188727A	1999-07-13
JPH1067805A	1998-03-10
JP2003261601A	2003-09-19
JP2000143722A	2000-05-26

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