Small scale microencapsulated pigments and uses thereof
First Claim
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1. A method of making a dewatered slurry ready for industrial use, said method comprising:
- producing a slurry including encapsulated thermochromic systems by combining;
an internal phase including a leuco dye and a developer for said leuco dye;
a resin; and
an aqueous phase including an anionic surfactant in an amount which constitutes greater than 2% of said slurry by weight;
wherein said amount of said anionic surfactant is effective to produce said encapsulated thermochromic systems which have a mean by volume particle size diameter of less than 1 micron; and
combining an amount of a chemical additive with said slurry;
wherein said amount of said chemical additive is effective to facilitate dewatering of said slurry with said anionic surfactant in place to provide said dewatered slurry comprising less than 60% water by weight.
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Abstract
A method is provided for making thermochromic pigments in microcapsules having unusually small particle sizes.
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Citations
17 Claims
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1. A method of making a dewatered slurry ready for industrial use, said method comprising:
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producing a slurry including encapsulated thermochromic systems by combining; an internal phase including a leuco dye and a developer for said leuco dye; a resin; and an aqueous phase including an anionic surfactant in an amount which constitutes greater than 2% of said slurry by weight; wherein said amount of said anionic surfactant is effective to produce said encapsulated thermochromic systems which have a mean by volume particle size diameter of less than 1 micron; and combining an amount of a chemical additive with said slurry; wherein said amount of said chemical additive is effective to facilitate dewatering of said slurry with said anionic surfactant in place to provide said dewatered slurry comprising less than 60% water by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification