Aqueous coating for copy paper, and a process for the production

Details Aqueous coating for copy paper, and a process for the production Aqueous coating for copy paper, and a process for the production

1989-01-11

1990-06-12

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106 22, 106169, 106194, 106450, 524413, C08K 300, C08L 100

Patent

active

049330128

ABSTRACT:
Aqueous coating of copy paper based on a porous inorganic matrix, an elastifying organic polymer and the color paste included in the pores. The inorganic matrix comprises a Zr.sup.4+ polycondensate or Zr/Al mixed oxide gel, which is preferably elastified by addition of alkali-soluble polyacrylates or poly(vinyl acetates) or water-soluble poly(vinyl alcohols) and contains the color paste included in the pores. For production, an aqueous solution or dispersion of the polymer is initially introduced, adjusted to a pH of from 8 to 9 by adding ammonia, and the color paste and an aqueous solution of the Zr compound are subsequently admixed. The coating composition is applied to a backing material and dried in a known manner.

REFERENCES:
patent: 4035196 (1977-07-01), Remer
patent: 4087284 (1978-05-01), Golden et al.
patent: 4822769 (1989-04-01), Langlais et al.

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