Process for the synthesis of silylated polyurethanes and silylated polyurethane composition
US11780952B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2017 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Aug 1, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2475/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process for the synthesis of silylated polyurethanes, comprising three sequential steps, a step (i) of preparing NCO-terminated polyurethane, a step (ii) of partial grafting of the NCO functions with silane functions and a step (iii) of total grafting of the residual NCO functions with functions that react with the NCO functions by means of polyfunctional compounds. The present invention also provides a silylated polyurethane composition that can be obtained by means of the process according to the invention, an adhesive composition comprising said silylated polyurethane composition and a self-adhesive item obtained from the adhesive composition according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.