Polymer with low molecular weight portion and high glass transition temperature portion for early block resistance
US12404397B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 17, 2023 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Nov 21, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/53
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymers including single-stage and multi-stage polymers that combine the properties of the structural integrity of a polymer with a high glass transition temperature (Tg) with a softer, lower molecular weight polymer that coalesces quickly and is flexible to maintain scrubbability are disclosed. The single-stage or an outer stage of the multi-stage polymer contains both a cross-linking monomer and a chain transfer agent at different portions of the stage. Architectural compositions containing these film-forming polymers exhibit anti-blocking properties within one hour from being applied to a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.