Method for improving erasability of erasable marking...

Details Method for improving erasability of erasable marking... Method for improving erasability of erasable marking...

C - Chemistry, Metallurgy

09

D

C09D 13/00 (2006.01) C09D 11/16 (2006.01)

Patent

CA 2143359

A method is disclosed for improving the erasability of erasable marking compositions, while maintaining the opacity of the coating and without producing burnishing, by incorporating into the compositions voided latex particles having a shell polymerized from either: (1) at least about 25% by weight, based on the weight of the shell, of a crosslinking comonomer; (2) at least about 5% by weight, based on the weight of the shell, of a crosslinking comonomer, when at least about 50% by weight of methyl methacrylate is used as a comonomer in the shell. An improved liquid marking composition is also disclosed.

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