Paper coating agent

Details Paper coating agent Paper coating agent

1997-11-20

1999-03-23

Michl, Paul R.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

525 61, B32B 2308

Patent

active

058857206

ABSTRACT:
Disclosed herein is a paper coating agent which comprises a modified polyvinyl alcohol (A) containing 3 to 15 mol % of ethylene units and an alkali metal ion (B), with the ratio of component (A) to component (B) being 100:0.003 to 100:1 in parts by weight. Disclosed also herein is a heat-sensitive recording material which comprises a coating layer on a substrate, said coating layer comprising a modified polyvinyl alcohol containing 3 to 15 mol % of ethylene units.
The paper coating agent of the present invention has such excellent solubility in boiling water that there is not a problem of insoluble matter in an aqueous solution of the coating agent. When applied for a paper surface coating agent, it gives coated paper without discoloration, superior, in surface strength, air barrier properties, and printability. When applied for a paper pigmented coating agent, it gives coated paper without discoloration, superior in water resistance and printability.
The heat-sensitive recording material of the present invention is superior in color developing sensitivity, water resistance, oil resistance, plasticizer resistance, and PVC film resistance. Furthermore it is superior in high-speed printability and image resolution, and it can be used in the field, such as facsimile, where high-speed printing is required.

REFERENCES:
patent: 4135026 (1979-01-01), Hoyt
patent: 4611029 (1986-09-01), Takahashi
patent: 4931500 (1990-06-01), Okamoto
patent: 5134036 (1992-07-01), Uemura
patent: 5260371 (1993-11-01), Chen
patent: 5599870 (1997-02-01), Nakamae
Database WPI, Derwent Publications, AN 89-088802, JP-A-01 038 279, Feb. 8, 1989.

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