Elastomeric compositions and their applications
US11332581B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Apr 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/854
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A condensation curable gel composition is the disclosed. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one hydrolysable and/or hydroxyl functional group(s) per molecule; (ii) a cross-linker selected from the group of a silicone, an organic polymer, a monosilane or a disilane molecule which contains at least two hydrolysable groups per molecule; and (iii) a condensation catalyst selected from the group of titanates, zirconates or tin (II). The molar ratio of hydroxyl and/or hydrolysable group(s) in polymer (i) to hydrolysable groups from component (ii) is between 0.5:1 and 1:1 using a monosilane cross-linker or 0.75:1 to 3:1 using disilanes. The titanates and zirconates comprise M-OR functions where M is titanium or zirconium and R is an aliphatic hydrocarbon group. The molar ratio of M-OR or tin (II) functions to the hydroxyl and/or hydrolysable groups in polymer (i) is comprised between 0.01:1 and 0.5:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.