US5138079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
α, ω-chlorosilazanes, and a process for their preparation
Assignee: Hoechst AG
•
Filing: 1991-01-24
•
Granted: 1992-08-11
•
Expires: 2011-01-24
Abstract
Abstract The invention 1204 to a process for the preparation of α, ω-chlorosilazanes which comprises reacting an oligohydridoorganylsilazane of the formula [--RSiH--NH--] n in which n is from about 3 to about 12 with at least one of the chlorosilanes R 1 HSiCl 2 , R 2 R 3 SiCl 2 , R 4 SiCl 3 , Cl 2 R 5 SiCl 2 CH 2 SiR 5 Cl 2 and Cl 3 SiCH 2 CH 2 SiR 6 Cl 2 where R is C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl and,independently of one another, R 1 -R 6 are H, C 1 -C 6 alkyl, or C 2 -C 6 -alkenyl, at from -20° C. to +50° C. In addition, the invention relates to the novel α, ω-chlorosilazanes obtainable by this process.
Inventors
- 👤 Tilo Vaahs
- 👤 Hans-Jerg Kleiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/589; C08; C08G; C08G77/00; C08G77/60; C08G77/62
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A process for the preparation of an α,ω-chlorosilazane, which comprises reacting an oligohydridoorganylsilazane of the formula [--RSiH--NH--] n in which n is from about 3 to about 12 with at least one of the chlorosilanes R 1 HSiCl 2 , R 2 R 3 SiCl 2 , R 4 SiCl 3 , Cl 2 R 5 SiCh 2 CH 2 SiR 5 Cl 2 or Cl 3 SiCH 2 CH 2 SiR 6 Cl 2 where R is C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl and, independently of one another, R 1 -R 6 are H, C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl, at from -20° C. to +50° C.
Claim 2
Dependent Claim
118 words
A process for the preparation of an α,ω-chlorosilazane, which comprises reacting an oligohydridoorganylsilazane of the formula [--RSiH--NH--] n in which n is from about 3 to about 12 with at least one of the chlorosilanes R 1 HSiCl 2 , R 2 R 3 SiCl 2 , R 4 SiCl 3 , Cl 2 R 5 SiCh 2 CH 2 SiR 5 Cl 2 or Cl 3 SiCH 2 CH 2 SiR 6 Cl 2 where R is C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl and, independently of one another, R 1 -R 6 are H, C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl, at from -20° C. to +50° C.
Claim 3
Dependent Claim
34 words
The process as claimed in claim 1, wherein R is CH 3 and, independently of one another, R 1 -R 6 are H, C 1 -C 3 -alkyl or C 2 -C 3 -alkenyl.
Claim 4
Dependent Claim
27 words
The process as claimed in claim 1, wherein R is CH 3 and, independently of one another, R 1 -R 6 are H, CH 3 or vinyl.
Claim 5
Dependent Claim
11 words
An α,ω-chlorosilazane obtained by the process as claimed in claim 1.
Claim 6
Dependent Claim
97 words
An α,ω-chlorosilazane of the formula I ##STR7## in which m denotes a value between 1 and 12, and --(Si) is a silyl radical of the formula --SiHR 1 Cl, --SiR 2 R 3 Cl, --SiR 4 Cl 2 , --SiR 5 Cl--CH 2 CH 2 --SiR 5 Cl 2 or --SiCl 2 --CH 2 CH 2 --SiR 6 Cl 2 , where R is C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl and, independently of one another, R 1 -R 6 are H, C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl.
Claim 7
Dependent Claim
97 words
An α,ω-chlorosilazane of the formula I ##STR7## in which m denotes a value between 1 and 12, and --(Si) is a silyl radical of the formula --SiHR 1 Cl, --SiR 2 R 3 Cl, --SiR 4 Cl 2 , --SiR 5 Cl--CH 2 CH 2 --SiR 5 Cl 2 or --SiCl 2 --CH 2 CH 2 --SiR 6 Cl 2 , where R is C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl and, independently of one another, R 1 -R 6 are H, C 1 -C 6 -alkyl or C 2 -C 6 -alkenyl.
Claim 8
Dependent Claim
34 words
An α,ω-chlorosilazane as claimed in claim 5, wherein R is CH 3 and, independently of one another, R 1 -R 6 are H, C 1 -C 3 -alkyl or C 2 -C 3 -alkenyl.
Claim 9
Dependent Claim
27 words
An α,ω-chlorosilazane as claimed in claim 5, wherein R is CH 3 and, independently of one another, R 1 -R 6 are H, CH 3 or vinyl.
References Cited (Backward Citations)
US3393218A
Cited
US3755397A
Cited
US3927057A
Cited
US4397828A
Cited
US4540803A
Cited
US4543344A
Cited
US4482669A
Cited
US4595775A
Cited
US4720532A
Cited
WO1988001260A1
Cited
US5008423A
Cited
US4882448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |