Title:
PRODUCTION OF BLENDED PARTICLES OF TITANIA AND SILICA
Document Type and Number:
Japanese Patent JPH09286609
Kind Code:
A
Abstract:
To provide a producing method of TiO2/SiO2 blended particles for imparting an excellent opaqueness after printing to paper.
The first time mineral acid is added to an alkali silicate aq. soln. at 20-55°C, and the secondary particles of silica are formed while rising the temp. to 65-95°C, then after adding a crystalline titanium dioxide so that TiO2/total SiO2 may be 2-25wt.%, 2-40wt.% additional alkali silicate aq. soln. per wt. of the silica incorporated in the alkali silicate aq. soln. at the time of starting reaction, then a pH of the obtained slurry is adjusted in a range of 3-6.5 by adding moreover the mineral acid, then the particles are ground and/or classified by wet process.
More Like This:
Inventors:
MATSUDA HITOSHI
IKUTA KEIICHI
MIYAWAKI HIDEMI
HIETA KAORU
IKUTA KEIICHI
MIYAWAKI HIDEMI
HIETA KAORU
Application Number:
JP12762296A
Publication Date:
November 04, 1997
Filing Date:
April 25, 1996
Export Citation:
Assignee:
OJI PAPER CO
International Classes:
C01B33/12; D21H17/67; (IPC1-7): C01B33/12; D21H17/67
Attorney, Agent or Firm:
中本 宏 （外３名）