Tackified polydiorganosiloxane oligourea segmented copolymers and a process for making same
US6407195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1997 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/458
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tackified compositions comprise a curable polydiorganosiloxane oligourea segmented copolymer which has alternating soft polydiorganosiloxane units and hard diisocyanate residues, the diisocyanate residue being the diisocyanate minus the —NCO groups. The units are connected together by urea linkages and the copolymer has end groups that are reactive under free radical or moisture cure conditions, and silicate resin. Also provided are pressure-sensitive adhesives, hot melt adhesives, and vibration damping composites, vibration damping constrained layer constructions, a bi-directional vibration damping constrained layer constructions, vibration damping shaped articles as well as a method of vibrationally damping an article and processes for producing curable vibration damping material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.