US5416233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of vinylsilane-benzocyclobutenes
Assignee: Dow Chemical Co
•
Filing: 1994-01-25
•
Granted: 1995-05-16
•
Expires: 2014-01-25
Abstract
Abstract This invention relates to a novel process for preparing vinylsilane-BCBs (vinylsilane-benzocyclobutenes) comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst. The invention also relates to a novel mixture of isomers of DVS-bisBCB (1,3-divinyl-1,1,3,3-tetramethyldisiloxane bisbenzocyclobutene) as well as novel partially or fully cured polymers derived from the vinylsilane BCBs.
Inventors
- 👤 Robert A. DeVries
- 👤 Edmund J. Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:16
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/0803; C07F7/0825; C07F7/0827; C07F7/0829; C07F7/0834; C07F7/0838; C07F7/0872; C07F7/0876; C07F7/0878; C07F7/0879; C07F7/14; C08; C08G; C08G61/00; C08G61/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
20 words
A process comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst to form a vinylsilane-BCB.
Claim 2
Dependent Claim
20 words
A process comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst to form a vinylsilane-BCB.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the acetylene-BCB is 4-acetylene-BCB.
Claim 4
Dependent Claim
29 words
The process of claim 2 wherein the hydrosilating reagent is a siloxane, a silane, a chlorosilane, an alkoxysilane, or a mixture thereof; and is linear, branched, cyclic, or polymeric.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the catalyst is a platinum catalyst.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein the hydrosilating reagent is tetramethyldisiloxane, tetraethyldisiloxane, or tetraphenyldisiloxane.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein the hydrosilating reagent is tetramethyldisiloxane.
Claim 8
Dependent Claim
13 words
The process of claim 6 wherein the platinum catalyst is chloroplatinic acid hexahydrate.
Claim 9
Dependent Claim
18 words
The process of claim 4 wherein the hydrosilating reagent is chlorodiphenylsilane, chloromethylphenylsilane, chlorodiethylsilane, chlorodimethylsilane, or a mixture thereof.
Claim 10
Dependent Claim
35 words
The process of claim 4 wherein the hydrosilating reagent is diphenylsilane, diethylsilane, dimethylsilane, or a mixture thereof, and the ratio of 4-acetylene-BCB to the hydrosilating reagent is about 1:1, to form an incompletely hydrosilated vinylsilane-BCB.
Claim 11
Dependent Claim
19 words
The process of claim 4 wherein the hydrosilating reagent is trimethylsilane, triethylsilane, triphenylsilane, phenyldimethylsilane, pentamethyldisiloxane, or a mixture thereof.
Claim 12
Dependent Claim
13 words
The process of claim 10 wherein the platinum catalyst is chloroplatinic acid hexahydrate.
Claim 13
Dependent Claim
28 words
A process comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst to form a vinylsilane-BCB that contains less than 1 weight percent trans-ethylenebisbenzocyclobutene.
Claim 14
Dependent Claim
28 words
A process comprising reacting a hydrosilating reagent with an acetylene-BCB in the presence of a catalyst to form a vinylsilane-BCB that contains less than 1 weight percent trans-ethylenebisbenzocyclobutene.
Claim 15
Dependent Claim
44 words
A process for preparing a vinylsilane-BCB comprising the steps of: a) reacting 4-bromo-BCB with trimethylsilylacetylene to form 1-trimethylsilyl-2-(4-benzocyclobutyl)-acetylene; b) desilating the 1-trimethylsilyl-2-(4-benzocyclobutyl)-acetylene to form 4-acetylene-BCB; and c) reacting a hydrosilating agent with the 4-acetylene-BCB in the presence of a catalyst to form the vinylsilane-BCB.
Claim 16
Dependent Claim
44 words
A process for preparing a vinylsilane-BCB comprising the steps of: a) reacting 4-bromo-BCB with trimethylsilylacetylene to form 1-trimethylsilyl-2-(4-benzocyclobutyl)-acetylene; b) desilating the 1-trimethylsilyl-2-(4-benzocyclobutyl)-acetylene to form 4-acetylene-BCB; and c) reacting a hydrosilating agent with the 4-acetylene-BCB in the presence of a catalyst to form the vinylsilane-BCB.
References Cited (Backward Citations)
US3404169A
Cited
US3410886A
Cited
US3793358A
Cited
US4642329A
Cited
US4724260A
Cited
US4579965A
Cited
US4822930A
Cited
US4812588A
Cited
US4898961A
Cited
US5041595A
Cited
US5136069A
Cited
US5243068A
Cited
US5138081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |