Silicone-polyether copolymer, sealants comprising same, and related methods
US10920078B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 26, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jul 5, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0685
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A silicone-polyether copolymer has the formula Xg[ZjYo]c, where each X is an independently selected silicone moiety having a particular structure, each Y is an independently selected polyether moiety, each Z is an independently selected siloxane moiety, subscript c is from 1 to 150, subscript g is >1, and each subscript j and o are independently >0 and <2, with the proviso that j+o=2 in each moiety indicated by subscript c. A method of preparing the silicone-polyether copolymer is also disclosed, and comprises reacting a polyether compound, a chain extending organosilicon compound, and an endcapping organosilicon compound in the presence of a hydrosilylation catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.