Agglomerated fillers used in paper

Details Agglomerated fillers used in paper Agglomerated fillers used in paper

1976-02-23

1978-09-19

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Non-fiber additive

162174, 162175, 162181A, 162183, D21H 366

Patent

active

041151879

ABSTRACT:
Acid reactive mineral particles are treated by dissolving certain hydrophilic organic polymeric compounds in the interparticulate water of an aqueous dispersion of the mineral particles and adding an interacting chemical to insolubilize the polymeric material and thereby form stable particle plus polymer agglomerates having a decreased rate of attack by acid. The acid protected particle plus polymer agglomerates are formed with a paper furnish into a paper sheet. A particularly preferred mineral is calcium carbonate. Suitable polymeric compounds are starch, sodium alginate, casein and alkali- solubilized latices. Sometimes it may be advantageous to use organic polymeric compounds in combination with one another.

REFERENCES:
patent: 1622474 (1927-03-01), Sveen
patent: 1808072 (1931-06-01), Rafton
patent: 2949397 (1960-08-01), Werner et al.
patent: 2952580 (1960-09-01), Frasch
patent: 3257267 (1966-06-01), Hay
patent: 3597251 (1971-08-01), Kaufman
patent: 3622447 (1971-11-01), VAN DER Geer
patent: 3647492 (1972-03-01), Chapman et al.

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