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 1246766

ABSTRACT An erasable ink containing â thermoplastic block copolymer, pigment particles, and a solvent. In a preferred embodiment, an erasable ink reequiring little or no pressuri- zation 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.

413495

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