Small Scale Microencapsulated Pigments And Uses Thereof
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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
24 Claims
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1-6. -6. (canceled)
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7. A dewatered slurry comprising:
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encapsulated thermochromic systems comprising; an internal phase including a leuco dye and a developer for said leuco dye; and a resin; wherein said encapsulated thermochromic systems have a mean by volume particle size diameter of less than 1 micron; an anionic surfactant in an amount which constitutes greater than 2% of said dewatered slurry by weight; and a chemical additive in an amount effective to facilitate dewatering with said anionic surfactant in place to provide said dewatered slurry comprising less than 60% water by weight. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification