Method for producing a composition comprising a polyurethane with NCO end groups
US11845830B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 19, 2018 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Oct 26, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J175/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing a composition comprising at least one polyurethane with NCO end groups, and at least one catalyst B selected from among tertiary amines, said method comprising the following steps: a) production of a polyurethane with NCO end groups, comprising a step of polyaddition of a polyol composition and a polyisocyanate composition, in the presence of at least one catalyst A selected from the group consisting of—organo-metallic catalysts excluding tin-based catalysts, —tertiary amines, and—mixtures of same; and b) the addition of at least one catalyst B, selected from among tertiary amines, to the polyurethane with NCO end groups obtained in step a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.