Erasable inks containing thermoplastic block copolymers

Details Erasable inks containing thermoplastic block copolymers Erasable inks containing thermoplastic block copolymers

1981-11-05

1983-06-21

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524505, 525 89, 525901, C08K 501, C09D 1118, C08L 5300

Patent

active

043894992

ABSTRACT:
An erasable ink containing a thermoplastic block copolymer, pigment particles, and a solvent. In a preferred embodiment, an erasable ink requiring little or no pressurization is provided by employing a mixture of radial and linear block copolymers and a mixed solvent system falling within a specific range of solubility parameter. Polybutene and poly-alpha-methylstyrene are preferred additives to decrease smearing tendency.

REFERENCES:
patent: T959010 (1977-06-01), Hansen
patent: 3875105 (1975-04-01), Daugherty et al.
patent: 3972848 (1976-08-01), Lakshmanan
patent: 4039629 (1977-08-01), Himes et al.
patent: 4059554 (1977-11-01), Pacansky
patent: 4097290 (1978-06-01), Muller et al.
patent: 4104326 (1978-08-01), Fodor
patent: 4216131 (1980-08-01), Himes et al.
patent: 4216132 (1980-08-01), Zweig et al.
patent: 4244862 (1981-01-01), Handa et al.

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