Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1988-09-28
1989-10-17
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621646, 1621815, 162183, D21H 378, D21H 348
Patent
active
048744662
ABSTRACT:
An improved paper making filler composition is comprised of the combination of a paper making pigment admixed with a cationic water soluble polymer in an aqueous dispersion, wherein the cationic water soluble polymer is present in said dispersion in the amount of from 0.1 to 2.0 weight percent based on said pigment, the cationic water soluble polymer being selected from the group consisting of polymers comprised of at least fifty percent by weight of repeating units consisting of a quaternary ammonium salt moiety and from 2 to 10 carbons, wherein the carbons form alkyl or aryl moieties or combinations thereof, may be substituted with hydroxy, amine, or halide, and polyaluminum chloride and mixtures thereof. An improved method of treating a paper making pulp comprises admixing with water such a cationic water soluble polymer selected from the group consisting of polymers, adding to said mixture of water and cationic water soluble polymer, with agitation, an amount of paper making pigment to form a dispersion wherein said cationic water soluble polymer is present in the amount of from 0.1 to 2.0 weight percent based on said pigment, and admixing the dispersion with paper making pulp.
REFERENCES:
patent: 3425855 (1969-02-01), Barksdale et al.
patent: 4610801 (1986-09-01), Matthews et al.
Alince & LePoutre, "Light Scattering of Filled Sheets: The Effect of Pigment Dispersion", TAPPI, vol. 64, No. 11, (Nov. 1981), pp. 117 & 118.
Alince, "Positively Charged TiO.sub.2 Pigment in Papermaking", Paperi Ja Puu, vol. 65, No. 3, (1978), pp. 123-125, 136.
Chin Peter
Epple Donald G.
Nalco Chemical Company
Norek Joan I.
Premo John G.
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