Polyurea microcapsules and liquid surfactant systems containing them
US12404480B2 · kind B2 · utility
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Key dates
| Filing date | Jan 17, 2020 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Aug 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0039
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Suggested are polyurea microcapsules obtainable or obtained by reacting di- and/or polyisocyanates and guanidine carbonate in the presence of chemically modified biopolymer colloidal protection agents. The capsules can be loaded for example with fragrances and show high resistance against agglomeration in unstructured (viscosity 10-300 cps), anionic surfactant based liquid products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.