Surface modification of microcapsules
US11384317B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Feb 12, 2018 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Feb 20, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of providing a modifier on the surface of an active-containing core-shell aminoplast microcapsule, including the covalent attachment of the modifier to the capsule shell surface by means of a coupling compound capable of covalent bonding to both shell and modifier by means of epoxy groups on the coupling compound. The method is especially useful for enhancing the substantiveness to fabrics of fragrance microcapsules added to laundry products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.