A FILTER COMPOSITION, A PROCESS OF MAKING THE COMPOSITION AND THE USE OF THE SAME

Title:

A FILTER COMPOSITION, A PROCESS OF MAKING THE COMPOSITION AND THE USE OF THE SAME

Document Type and Number:

WIPO Patent Application WO/2003/093578

Kind Code:

A1

Abstract:

The present Invention discloses a filler composition, mainly comprised of 30-38 weight parts of Si0₂, 15-21 weight parts of CaO, 17-21 weight parts of MgO, 2-3 weight parts of A1₂0₃, 3.9-5.9 weight parts of S0₄^2- and 8.8-31 weight parts of crystal water. It may also contain Fe₂0₃, Na₂0 and K₂0 in amount of less than 1 % of the total weight parts of the composition. The composition is mainly made of (i) talc, (ii) natural calcium metasillicate, (iii) bentonite, (iv) magnesia or magnesium carbonate and (v) surfactant. The surfactant is mainly comprised of 10-12 weight parts of Si0₂, 7-11 weight parts of A1₂0₃, 36-39 weight parts of S0₄^2- and 27-38 weight parts of crystal water, It may also contain Fe₂0₃, CaO, Na₂0 and K₂0 in amount of less than 7.2 % of the total weight parts of the surfactant. Also, the present invention discloses a process of making the filler composition and the use of the same in the field of paper-making.

Inventors:

CHIM KIM KIU JACKY (CN)
YUAN ZHILUN (CN)

Application Number:

PCT/CN2003/000308

Publication Date:

November 13, 2003

Filing Date:

April 28, 2003

Export Citation:

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Assignee:

ADDATA DEV LTD (CN)
CHIM KIM KIU JACKY (CN)
YUAN ZHILUN (CN)

International Classes:

C09C1/40; C09C1/42; D21H19/38; D21H17/67; D21H21/24; (IPC1-7): D21H21/10; D21H21/18

Foreign References:

CN87106213A	1988-03-23
CN1034597A	1989-08-09
CN1359986A	2002-07-24

Attorney, Agent or Firm:

SHANGHAI PATENT & TRADEMARK LAW OFFICE (Shanghai 3, CN)

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