Ink composition for writing board

Details Ink composition for writing board Ink composition for writing board

1986-07-10

1988-04-26

Barr, Josephine L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524547, 106 20, 106 22, 260DIG38, C08J 506, C09D 1100

Patent

active

047405490

ABSTRACT:
Disclosed is a wipe-erasable ink composition for a writing board, which has good erasability and long-period stability. This ink composition comprises a colored polymer formed by dyeing an organic solvent-soluble resin having a sulfonic acid group or a salt thereof with a basic dye, a volatile organic solvent and, as additives, (A) a nonionic surface active agent having an HLB value of 8 to 14 and/or a cationic organic compound, and (B) a slightly volatile or nonvolatile organic compound.

REFERENCES:
patent: 4170669 (1979-10-01), Okada
patent: 4357431 (1982-11-01), Murakami et al.
patent: 4634606 (1987-01-01), Skogg

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