Carbonless copy paper

Details Carbonless copy paper Carbonless copy paper

1987-06-17

1989-04-18

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified reactant isolating material or capsule wall...

427150, 427151, 4284022, 42840221, 42840222, 428914, 503215, 503225, B41M 514, B41M 522

Patent

active

048227706

ABSTRACT:
Carbonless copy paper is prepared by placing a first sheet of paper coated on one side with a hydrophilic colloid solution in which are dispersed microcapsules of oil droplets containing a colorless electron donor dye into contact with a second sheet of paper coated with an absorbent and an electron accepting color developer compound. The heat resistance and moisture resistance of the copy paper is substantially improved by adding to the hydrophilic colloid solution a graft copolymer having a backbone of carboxymethyl cellulose or gum arabic and side chains of polyacrylic acid or polymethacrylic acid. The image response time of the second sheet can be improved by adding pectin or sulfated starch to the coating.

REFERENCES:
patent: 2800457 (1957-07-01), Green et al.
patent: 3554781 (1971-01-01), Matsukawa
patent: 3900216 (1975-08-01), Hayashi et al.
patent: 4064294 (1977-12-01), Babil
patent: 4154462 (1979-05-01), Golden et al.
patent: 4337968 (1982-07-01), Maierson
patent: 4352855 (1982-10-01), Hiraishi et al.
patent: 4371634 (1983-02-01), Hoffman et al.
patent: 4411451 (1983-10-01), Matsushita et al.
patent: 4421344 (1983-12-01), Ikezawa et al.
patent: 4422671 (1983-12-01), Cespon

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