Erasable inks containing thermoplastic block copolymers

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

C - Chemistry, Metallurgy

09

D

400/3028

C09D 11/18 (2006.01) C08F 293/00 (2006.01) C08K 5/01 (2006.01) C09D 153/02 (2006.01)

Patent

CA 1247274

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 pressuri- zation is provided by empolying a mixture of radial adn linear block copolymers and a mixed solvent system falling within a specific range of solubility parameter. Polybutene and poly-alpha-methylstyrene are preferred additive to decrease smearing tendency.

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