| 摘要 |
<p>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 between about 5.5 and 6.5, a maximum Brookfield viscosity of about 300 cps., and a surface tension of between about 49.0 and 55.0. 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.</p> |
