Carbosiloxane dendrimers
US6184407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | May 24, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/50
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
To provide a novel branched siloxane-silalkylene copolymer whose molecule contains a plural number of silicon-bonded hydrogen atoms or silicon-bonded alkoxy groups. Carbosiloxane dendrimer that contains at least one siloxane unit with the general formula EQU X.sup.1 R.sup.1.sub.a SiO.sub.(3-a)/2 {R.sup.1 is C.sub.1 to C.sub.10 alkyl or aryl, a is an integer from 0 to 2, and X.sup.1 is the silylalkyl group with the following formula at i=1 ##STR1## PA1 (R.sup.1 is C.sub.1 to C.sub.10 alkyl or aryl, R.sup.2 is C.sub.2 to C.sub.10 alkylene, R.sup.3 is C.sub.1 to C.sub.10 alkyl, X.sup.i+1 is the hydrogen atom or the above-defined silylalkyl group at i=i+1, i is an integer with a value from 1 to 10 that specifies the generation of the said silylalkyl group, and b.sup.i is an integer from 0 to 3 with the proviso that b.sup.1 in at least one X.sup.1 in each molecule is an integer from 0 to 2)} wherein when more than 1 is present these siloxane units may be the same or different, and whose core is a polysiloxane structure that contains at least 2 silicon atoms and the aforesaid siloxane unit(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.