Finely particulate polymer for stencil ink

Details Finely particulate polymer for stencil ink Finely particulate polymer for stencil ink

1996-05-17

1999-11-23

Niland, Patrick D.

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...

106 3101, 106 3113, 106 316, 106 3127, 428402, 428407, 523160, 523161, 523200, 523220, 524507, 524589, 524591, C08J 300, C08K 320, C08L 7500, C09D 1112

Patent

active

059902302

ABSTRACT:
A finely particulate polymer for use in a stencil ink is disclosed which is uniformly dispersible into a binder polymer having a solubility parameter of 11.0 or lower and has an average particle diameter of from 0.1 to 10 .mu.m and a maximum particle diameter of 50 .mu.m or smaller. The finely particulate polymer is highly advantageous in that stencil inks having an appropriate viscosity can be easily obtained with the particulate polymer using the same formulation even when the inks contain different colorants, and that with the particulate polymer, a colorant which has been unusable due to its adverse influence on the storage stability of stencil inks can be used to produce a stencil ink having excellent storage stability by encapsulating the colorant in the individual polymer particles.

REFERENCES:
patent: 4162997 (1979-07-01), Walsh
patent: 4243702 (1981-01-01), Walsh
patent: 5155165 (1992-10-01), Maruyama e tal.
patent: 5312865 (1994-05-01), Hoefer et al.

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