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US4774028A
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Liquid crystalline organosilicon compounds
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1985-05-23
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Granted: 1988-09-27
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Expires: 2005-05-23
Abstract
Abstract Non-crosslinked, branched liquid crystalline organosilicon compounds exhibit the general formula (R.sub.3 SiO.sub.1/2).sub.w (R.sub.2 SiO).sub.x (RSiO.sub.3/2).sub.y (SiO 4/2 ) z where at least one R represents a mesogenic (liquid crystal forming) group, the remaning R represent monovalent hydrocarbon or halohydrocarbon radicals, w represents an integer having a value of at least 1, x, y, and z individually represent an integer including zero, the sum of x and y is at least 1 and the sum of w, x, y, and z is from 4 to 50, inclusive.
Inventors
- 👤 Takeshi Imai
- 👤 Naoyuki Koide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:29
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/40; C09K19/406; C09K19/408; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08; C08G; C08G77/00; C08G77/04; C08G77/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A non-crosslinked liquid crystalline organosilicon compound of the general formula (R.sub.3 SiO.sub.1/2).sub.w (R.sub.2 SiO).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z where at least one R present on at least one of the R 3 SiO 178 units represents a mesogenic group that exhibits a nematic or cholesteric phase and is bonded to silicon by a carbon atom of an alkylene or oxyalkylene radical and the remaining R are individually selected from the group consisting of methyl, phenyl and 3,3,3-trifluoropropyl radicals, w represents an integer having a value of at least 1, x, y and z are individually integers including 0, the sum of y and z is at least 1 and the sum of w, x, y and z is from 4 to 50, inclusive.
Claim 2
Dependent Claim
121 words
A non-crosslinked liquid crystalline organosilicon compound of the general formula (R.sub.3 SiO.sub.1/2).sub.w (R.sub.2 SiO).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z where at least one R present on at least one of the R 3 SiO 178 units represents a mesogenic group that exhibits a nematic or cholesteric phase and is bonded to silicon by a carbon atom of an alkylene or oxyalkylene radical and the remaining R are individually selected from the group consisting of methyl, phenyl and 3,3,3-trifluoropropyl radicals, w represents an integer having a value of at least 1, x, y and z are individually integers including 0, the sum of y and z is at least 1 and the sum of w, x, y and z is from 4 to 50, inclusive.
Claim 3
Dependent Claim
19 words
The organosilicon compound of claim 1 where the compound exhibits a formula selected from the group consisting of ##STR19##
Claim 4
Dependent Claim
68 words
An organosilicon compound according to claim 1 exhibiting a general formula ##STR20## where each R' is individually selected from the group consisting of methyl, phenyl and 3,3,3,-trifluoropropyl radicals, R" represents said mesogenic group and is bonded to silicon by means of a carbon atom that is part of an alkylene or alkenyloxy radical, a is 0 or 1 and b represents an integer from 0 to 10, inclusive.
Claim 5
Dependent Claim
31 words
An organosilicon compound according to claim 3 where said compound exhibits the formula ##STR21## R' is methyl and the carbon atom bonding R" to silicon is part of an alkyleneoxy radical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |