Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1994-09-30
1997-01-07
Acquah, Samuel A.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 20R, 106 23R, 106 23C, 524604, 524608, 524650, 524801, 524803, C09D 1100
Patent
active
055912559
ABSTRACT:
The present invention comprises a series of discoveries related to the problems associated with formulations that destroy the color change properties of thermochromic encapsulated dyes. One aspect of the present invention is the discovery of a method of correcting these formulations to allow the addition of thermochromic dyes. Certain solvents destroy the dye, therefore any aldehydes, ketones, and diols, and most aromatic compounds should be removed from the formulation and if needed they should be replaced with solvents preferably having a large molecular weight (i.e. greater than 100 and low reactivity). Secondly, the formulation should be adjusted to be neutral (i.e. 6.5-7.5 pH) or have a low acid value. These two adjustments will allow the thermochromic dyes to added to the formulation without a loss of its color change properties.
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Hot Sense Inks, Sales Information, 9 pages.
Acid Method Information, ASTM Test Method D-1639-70, 1 page.
Highberger Gerald
Small Lyle D.
Acquah Samuel A.
Chromatic Technologies, Inc.
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