Coating composition comprising silica-polymer core-shell particles, method of making composition and article
US10793746B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Dec 25, 2015 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition having pH of 6 or less comprises composite particles dispersed in an aqueous continuous liquid phase. Each composite particle comprises a non-cationic polymer core surrounded by a silica shell consisting essentially of silica particles having a mean particle diameter of 3.2 nanometers or less. The weight ratio of the total amount of the silica in the composition to the total polymer is in a range of 0.2 to 2.2. The composition is useful for making various articles. A method for making the composition is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.