Colour changing composition in emulsion form comprising a partially neutralized, crosslinked acrylic homopolymer or copolymer
US9889073B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Mar 5, 2014 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Apr 18, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/654
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The instant invention relates to a color changing composition in the form of an emulsion comprising, at least: a) microcapsules containing releasable colorant(s), said microcapsules comprising: —a core comprising one organic material, —at least one layered coating surrounding said core, the layered coating comprising at least one polymer, at least one colorant, and advantageously at least one lipid-based material, b) at least partially neutralized, crosslinked acrylic homopolymers or copolymers preferably in a non-particulate form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.