Title:
DISPERSANT FOR CALCIUM CARBONATE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/008294
Kind Code:
A1
Abstract:
Provided is a dispersant for calcium carbonate with which the initial viscosity of a calcium carbonate slurry obtained by wet grinding is low and furthermore a marked rise in viscosity over time is prevented, and also provided is a method for producing the dispersant for calcium carbonate. The dispersant for calcium carbonate contains an acrylic polymer having a weight-average molecular weight between 4,500 and 8,500 that is obtained by: a polymerization step in which a monomer comprising acrylic acid is polymerized at a reaction temperature between 68 and 82ºC in the presence of 1.4 to 4.4 parts by mass of a hypophosphite and 0.3 to 1.5 parts by mass of a persulfate per 100 parts by mass of the monomer, using an isopropyl alcohol aqueous solution as a solvent; and a neutralization step in which 15 to 95 mol% of carboxyl groups having structural units derived from the monomer comprising the resulting polymer are neutralized.
More Like This:
| JP01094935 | DISPERSING AGENT FOR EMULSION POLYMERIZATION |
| JP2008214530 | COPOLYMER AND USE OF THE SAME |
| JP2011225776 | PIGMENT DISPERSION COMPOSITION |
Inventors:
FUJIWARA Masahiro (C/O TOAGOSEI CO. LTD, 8, Showa-cho, Minato-ku, Nagoya-sh, Aichi 26, 〒4550026, JP)
Application Number:
JP2011/064687
Publication Date:
January 19, 2012
Filing Date:
June 27, 2011
Export Citation:
Assignee:
TOAGOSEI CO., LTD. (1-14-1, Nishi-Shimbashi Minato-k, Tokyo 19, 〒1058419, JP)
東亞合成株式会社 (〒19 東京都港区西新橋一丁目１４番１号 Tokyo, 〒1058419, JP)
東亞合成株式会社 (〒19 東京都港区西新橋一丁目１４番１号 Tokyo, 〒1058419, JP)
International Classes:
B01F17/52; C08F2/10; C08F6/00; C09D17/00
Download PDF:
Claims: