Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1991-03-22
1993-04-13
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106466, 106481, 106483, 106492, 423311, 423326, C09C 124, C09C 102, C09C 128
Patent
active
052019500
ABSTRACT:
A method for producing a low-structure magnesium silicate SLR product useful to lower the strike through of low brightness paper products comprises adding a raw mineral source of soluble magnesium ions and sulfuric acid in a proportion and under conditions effective to form a slurry comprising soluble magnesium sulfate and a silica leach residue (SLR), and adding to the slurry a solution of an alkali metal silicate in a molar equivalent proportion of MgO:SiO.sub.2 of 1:2.0-4.0 under conditions effective to precipitate the magnesium ions and form a product comprising a low-structure magnesium silicate and SLR having a proportion of SiO.sub.2 :MgO:SLR of 50-75%:5-12%:10-50% by weight of the product.
A low-structure magnesium silicate SLR filler comprises 50 to 75 wt % SiO.sub.2, 5 to 12 wt % MgO, 10 to 50 wt % SLR, 0 to 6 wt % Fe.sub.2 O.sub.3, and 0 to 7 wt % Al.sub.2 O.sub.3, wherein the proportion MgO:SiO.sub.2 is 1:2.0-4.0.
A paper product comprises at least an amount of the filler of the invention.
A method of reducing the strike through of a paper product comprises adding 0.001 to 8 wt % of the filler described above to a paper to form a low-brightness, low-strike through paper product.
REFERENCES:
patent: 1865224 (1932-06-01), Winston et al.
patent: 2402370 (1946-06-01), Chalmers
patent: 3320029 (1967-05-01), Adams
patent: 3325276 (1967-06-01), Feller
patent: 3328124 (1967-06-01), Mays et al.
patent: 3328125 (1967-06-01), Mays et al.
patent: 3338667 (1967-08-01), Pundsack
patent: 3401015 (1968-09-01), Ninger et al.
patent: 3437441 (1969-04-01), Mays et al.
patent: 4058587 (1977-11-01), Nelson
patent: 4277449 (1981-07-01), Lalancette
patent: 4810280 (1989-03-01), le van Mao et al.
"Industrial Minerals and Rocks" 2nd. Ed., The American Institute of Mining and Metallurgical Engineers, pp. 538-539, 1949.
S. A. Wason, "Cosmetic properties and structure of fine particle synthetic precipitated silicas", J. Soc. Cosmet. Cem. 29, 497-521 (Aug. 1978).
Heikkila Kaarina
Martensson Leif B.
Bell Mark L.
Flanders Harold H.
Hertzog Scott L.
Horn Alec H.
J. M. Huber Corporation
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