Back to results
US 4,302,367 AGranted
Paper-coating compositions
AssigneeBASF SE
InventorsClaus Cordes, Guenter Hirsch, Heinrich Hartmann
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBASF SE
InventorsClaus Cordes, Guenter Hirsch, Heinrich Hartmann
Estimating the term…
An improved paper-coating composition containing, per 100 parts by weight of finely divided pigment, from 5 to 25 parts by weight of one or more copolymers, having a glass transition temperature of from -40.degree. to 50.degree. C., in the form of an aqueous dispersion, and from 0.1 to 10 parts by weight of one or more water-soluble or water-swellable co-binders selected from the group comprising polyvinyl alcohol, cellulose ethers, starch, casein, alginates and high molecular weight carboxyl-containing emulsion polymers. The co-binder is added to the paper-coating composition in the form of a water-in-oil emulsion. Paper-coating compositions having high water retention are obtained, and papers coated with such compositions have improved water resistance.
An improved paper-coating composition containing, per 100 parts by weight of finely divided pigment, from 5 to 25 parts by weight of one or more copolymers, having a glass transition temperature of from -40.degree. to 50.degree. C., in the form of an aqueous dispersion, and from 0.1 to 10 parts by weight of one or more water-soluble or water-swellable co-binders selected from the group consisting of polyvinyl alcohol, cellulose ether, starch, casein and alginates, said composition being prepared by emulsifying said co-binder in a hydrocarbon oil to form a water-in-oil emulsion and then mixing the emulsion with the remaining components of the composition.
An improved paper-coating composition containing 100 parts by weight of finely divided pigment, from 5 to 25 parts by weight of at least one copolymer, having a glass transition temperature of from -40.degree. C. to 50.degree. C., in the form of an aqueous dispersion, and from 0.1 to 10 parts by weight of polyvinyl alcohol as a water-soluble or water-swellable co-binder, said composition being prepared by emulsifying said co-binder in a hydrocarbon oil to form a water-in-oil emulsion and then mixing the emulsion with the remaining components of the composition.
Dependencies are inferred from the claim text.