Erasable writing ink composition

Details Erasable writing ink composition Erasable writing ink composition

1993-01-28

1997-04-15

Cain, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523161, 524575, 106 19A, 106 20A, C03C 1700

Patent

active

056210213

ABSTRACT:
The present invention provides an erasable writing ink composition which can be erased with an eraser after writing. The erasable writing ink composition of the present invention comprises 2 to 50% by weight of a resin selected from the group consisting of styrene-butadiene rubber and an acrylonitrile-butadiene rubber having a film-forming temperature of 0.degree. C. or less or a glass transition temperature of 0.degree. C. or less, 0 to 5% by weight of a surface active agent, 1 to 50% by weight of colored spherical fine particles and 20 to 97% by weight of water.

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