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(19)

(11)

2 274 693

(13)

(51)

IPC

D21H19/36(2006-01-01)

D21H19/38(2006-01-01)

D21H19/44(2006-01-01)

D21H19/46(2006-01-01)

D21H19/54(2006-01-01)

D21H19/60(2006-01-01)

D21H19/64(2006-01-01)

D21H17/67(2006-01-01)

D21H17/69(2006-01-01)

D21H17/28(2006-01-01)

D21H17/36(2006-01-01)

C09C1/02(2006-01-01)

C09C1/40(2006-01-01)

C01F7/02(2006-01-01)

C01F11/02(2006-01-01)

C01F11/18(2006-01-01)

(21) (22)

Application

2005103753/12, 2005-02-15

(24)

Start date

2005-02-15

(22)

Actual filing date

2005-02-15

(45)

Published

2006-04-20

(72)

Inventor

Mazitov Leonid AskhatovichBondarev Anatolij IvanovichTjurin Evgenij Timofeevich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Bumagi"

METHOD OF PREPARING PIGMENT FOR MANUFACTURING PAPER AND CARDBOARD Russian patent published in 2006 - IPC D21H19/36 D21H19/38 D21H19/44 D21H19/46 D21H19/54 D21H19/60 D21H19/64 D21H17/67 D21H17/69 D21H17/28 D21H17/36 C09C1/02 C09C1/40 C01F7/02 C01F11/02 C01F11/18

Abstract RU 2274693 C1

FIELD: paper-and-pulp industry.

SUBSTANCE: invention relates to pigment, which can be used in manufacture of paper with filler, coated paper, and cardboard. Calcium hydroxide and calcium carbonate powders taken in proportion between 1.0:2.2 and 1.0:23.5 are added to vigorously stirred water, after which temperature of mixture is raised to 80-85°C and resulting reaction mixture is kept being stirred for 90-180 min to form dispersion of pigment containing 20-35% solids.

EFFECT: improved quality of pigment at lower cost and extended application area.

3 tbl

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RU 2 274 693 C1

Authors

Mazitov Leonid Askhatovich

Bondarev Anatolij Ivanovich

Tjurin Evgenij Timofeevich

Dates

2006-04-20—Published

2005-02-15—Filed