Silicone compounds containing sterically hindered cyclic amine functional groups which are useful for the light and thermal stabilization of polymers
US5792825A · kind A · utility
3Cited by
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18Claims
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Key dates
| Filing date | Jun 11, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L101/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to linear, cyclic or branched polyorganosiloxanes having, per molecule, at least three siloxy units, including at least one functional unit of formula: ##EQU1## where R.sup.1 represents a C.sub.1 to C.sub.4 alkyl or phenyl radical and X contains a secondary or tertiary cyclic amine functional group bonded to the silicon via an Si--A--C bond where A is a residue comprising a cyclic acetal group. X more specifically represents a monovalent group of formula: ##STR1## The present invention also relates to the use of such polyorganosiloxanes in polymers for improving in particular their photostabilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.