Cationic polymer-modified filler material, process for its prepa

Details Cationic polymer-modified filler material, process for its prepa Cationic polymer-modified filler material, process for its prepa

1990-12-17

1992-09-15

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621643, 1621646, 1621811, 1621812, 162183, D21H 1769

Patent

active

051475073

ABSTRACT:
Material, such as natural ground and precipitated calcium carbonate, when modified by surface-treatment with a cationic polymer, has been discovered to be highly effective as a filler material in the making of paper. Utilization of this type of filler material greatly improves the papermaking process by reducing the usage of wet end sizing agent, improving opacity, improving filler retention in the furnish, and causing better drainage on the papermachine, all of which result in the production of a high quality paper having excellent opacity and tensile strength characteristics. The nature of the polymer-modified filler material, the process for its preparation and the method of its use in papermaking are disclosed.

REFERENCES:
patent: 2865743 (1958-12-01), Weisgerber
patent: 2992964 (1961-07-01), Werner et al.
patent: 3252852 (1966-05-01), lagally
patent: 3922243 (1975-11-01), Aldrich et al.
patent: 4295933 (1981-10-01), Smith
patent: 4376078 (1983-03-01), Topfl
patent: 4610801 (1986-09-01), Matthews et al.

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