Polyisocyanate-based intumescent coating
US10640657B2 · kind B2 · utility
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Key dates
| Filing date | Oct 7, 2014 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | May 23, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/387
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Intumescent coating composition comprising a polyisocyanate, a polyfunctional isocyanate-reactive compound and an intumescent ingredient, wherein the intumescent ingredient contains at least one or more compounds containing phosphorus, nitrogen and boron atoms and the weight ratio phosphorus to nitrogen in said intumescent ingredient is between 0.5/1 to 1.5/1 and the amount of boron is from 1 to 5 wt % based on the coating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.