Mechanically erasable ballpoint ink

Details Mechanically erasable ballpoint ink Mechanically erasable ballpoint ink

1991-02-21

1992-11-03

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106 32, C09D 1118

Patent

active

051603691

ABSTRACT:
The present invention provides ballpoint pen ink compositions containing carbon black which are initially erasable and require little or no external pressure for ink delivery. The ink can be erased easily with a normal rubber eraser such as that found on pencils. The ink compositions of the present invention comprises: about 15% to about 40% of an aliphatic hydrocarbon, about 15% to about 40% of an aromatic hydrocarbon, about 1% to about 15% of a colorant, about 4% to about 40% of one or more of a preselected thermoplastic block copolymer, and about 5% to about 40% of a preselected parting agent.

REFERENCES:
patent: 4329262 (1982-05-01), Muller
patent: 4578117 (1986-03-01), Nakanishi
patent: 4606769 (1986-08-01), Tanaka et al.
patent: 4629248 (1986-12-01), Miyajima

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