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US 8,618,190 B2Granted
Latex marking inks
AssigneePolyOne Corporation
InventorsHeather E. Burik, Steve White
Life of this patent
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Abstract
A latex marking ink suitable for marking rubber articles has been developed. The ink comprises vulcanizable rubber latex, pigment, vulcanizing agent, and non-ionic stabilizer dispersed in water. Shear stability is dramatically and unexpectedly increased by the presence of the non-ionic stabilizer even though viscosity also increases.
Claims14
A latex marking ink, comprising:
- (a) vulcanizable rubber;
- (b) pigment;
- (c) water;
- (d) a vulcanizing agent;
- and
- (e) octyl phenol ethoxylate comprising an average of about 35 moles of ethoxylation and present in an amount from about 0.1 to about 5 weight percent of the ink,
- wherein shear stability of the ink is greater than three times shear stability of the ink without the octyl phenol ethoxylate as determined by ASTM D1076, and
- wherein the vulcanizable rubber is present in an amount from about 55 to about 75 weight percent of the ink, the pigment is present in an amount from about 10 to about 20 weight percent of the ink, the vulcanizing agent is present in amount ranging from about 0.2 to about 4.0 weight percent of the ink, and the water is present in an amount ranging from about 5 to about 25 weight percent of the ink.
5 more elements
Dependencies are inferred from the claim text.