D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
400/1341
D21H 19/38 (2006.01) D21H 19/22 (2006.01) D21H 19/40 (2006.01) D21H 19/54 (2006.01) D21H 19/58 (2006.01) D21H 21/52 (2006.01)
Patent
CA 1092737
ABSTRACT OF THE DISCLOSURE A non-proteinaceous binder is provided for cast coating of paper which comprises three primary components; a modified starch; a styrene-butadiene latex characterized by a particle size of about 800 to about 1300 angstroms, a solids content of between about 45.0 and about 47.0%, a maximum 200 mesh residue of about 0.075 gms./900 mls., a pH of between about 3.8 and 4.8, a maximum Brookfield viscosity of about 100, and a surface tension of between about 43.0 and about 49.0; and a second styrene-butadiene latex characterized by a particle size of about 1350 to about 1650 angstroms, a solids content of between about 47.0 and about 49.0%, a maximum 200 mesh residue of about 0.05 gms./900 mls., a pH of be- tween about 5.5 and 6.5, a maximum Brookfield viscosity of about 300 cps., and a surface tension of between about 49.0 and 55Ø An aqueous aliquot portion of the composition is coated on a paper substrate, pressed against a chromium heat roll and dried, thereby providing a cast coating paper according to the invention.
289375
Craig Gerald
Evans Wilbur G.
Potts Everett L.
Champion International Corporation
Goudreau Gage & Associates
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