Polysiloxanes and their preparation
US7238768B2 · kind B2 · utility
18Cited by
20References
23Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 21, 2006 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Nov 21, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An amino-functional polysiloxane is prepared by reacting an aminosilane (A) which contains an aminoalkyl group and at least one alkoxy group bonded to Si with a carboxylic acid and a silanol-functional polysiloxane (B). The aminosilane (A) is partially converted into its carboxylate salt which acts as a catalyst for the siloxane condensation polymerization reaction between (A) and (B).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.