Erasable ink for ball point pens

Details Erasable ink for ball point pens Erasable ink for ball point pens

1982-07-29

1983-12-06

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524169, 524377, 524384, 524473, C09D 1118, C08K 505, C08K 506

Patent

active

044194641

ABSTRACT:
An erasable ink for use in a ball point pen, particularly in a pressurized cartridge, is a fluid comprising at least 10% w of polyvinyl acetate or a copolymer of ethylene and vinyl acetate, and at least 10% w trichloroethylene. The ink preferably also contains at least 5% w of a solvent boiling in the range of 180.degree.-250.degree. C., a plasticizer boiling above 270.degree. C., a colorant, and a tackifier.

REFERENCES:
patent: 3728299 (1973-04-01), Schramm
patent: 3875105 (1975-04-01), Daugherty et al.
patent: 3930794 (1976-01-01), Birke et al.
patent: 3950185 (1976-04-01), Toyama et al.
patent: 3972975 (1976-08-01), Noda

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