Silicone oligomers with higher alkoxy groups
US6207783A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1999 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | May 18, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5425
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An oligomer of the formula: EQU [R.sub.3 SiO.sub.1/2 ].sub.m [O.sub.1/2 Si(R.sub.2)O.sub.1/2 ].sub.n [SiO.sub.3/2 R].sub.o [SiO.sub.4/2 ].sub.p (I) wherein PA1 each R is selected individually from the group consisting of R.sup.1, --OR.sup.2 and --OR.sup.3 ; PA1 each R.sup.1 is independently a substituted or unsubstituted hydrocarbon group; each PA1 R.sup.2 is a C.sub.1 -C.sub.6 alkyl group or an acyl group; and each R.sup.3 is a independently an alkyl or alkenyl group having at least 8 carbon atoms; with the provisos that PA1 if R.sup.3 is alkenyl, there is no unsaturation within two carbon atoms adjacent to the oxygen atom of the --OR.sup.3 group; at least one R group is --OR.sup.3 ; at least one quarter of all R groups are --OR.sup.2 or --OR.sup.3 ; m=2 to 20; n=0 to 50; o=0 to 20; and p=0 to 10. The oligomer is a useful component of in insulation formulations for wire and cable used in underground locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.