US5629439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of allylsilanes
Assignee: Dow Silicones Corp
•
Filing: 1996-03-28
•
Granted: 1997-05-13
•
Expires: 2016-03-28
Abstract
Abstract A method for the preparation of allylsilanes. The method comprises contacting magnesium metal with a mixture comprising diethylene glycol dibutyl ether, allyl halide, and a halosilane at a temperature within a range of about 5° C. to 20° C. The method provides a high yield of allylsilane product that is easily recoverable and also provides for high ratios of allylsilane to hexadiene by-product.
Inventors
- 👤 Howard M. Bank
- 👤 Sean P. Davern
- 👤 Binh T. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:11
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0825; C07F7/0827; C07F7/0896; C07F7/12; C07F7/121; C07F7/122
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
A method for preparation of allylsilanes, the method comprising contacting magnesium metal with a mixture comprising diethylene glycol dibutyl ether, allyl halide, and a halosilane described by formula Me.sub.a H.sub.b SiX.sub.4-a-b, where Me is methyl, X is a halogen selected from a group consisting of chlorine and bromine, a=0 to 3, b=0 or 1, and a+b=1 to 3, at a temperature within a range of about 5° C. to 200° C.
Claim 2
Independent Claim
71 words
A method for preparation of allylsilanes, the method comprising contacting magnesium metal with a mixture comprising diethylene glycol dibutyl ether, allyl halide, and a halosilane described by formula Me.sub.a H.sub.b SiX.sub.4-a-b, where Me is methyl, X is a halogen selected from a group consisting of chlorine and bromine, a=0 to 3, b=0 or 1, and a+b=1 to 3, at a temperature within a range of about 5° C. to 200° C.
Claim 3
Dependent Claim
27 words
A method according to claim 1, where the method is conducted as a continuous process comprising by passing the mixture through a bed of the magnesium metal.
Claim 4
Dependent Claim
22 words
A method according to claim 1, where the allyl halide is selected from a group consisting of allyl chloride and allyl bromide.
Claim 5
Dependent Claim
13 words
A method according to claim 1, where the allyl halide is allyl chloride.
Claim 6
Dependent Claim
10 words
A method according to claim 1, where X is chlorine.
Claim 7
Dependent Claim
22 words
A method according to claim 1, where the halosilane is selected from a group consisting of trimethylchlorosilane, dimethylchlorosilane, methyldichlorosilane, dimethyldichlorosilane, and methyltrichlorosilane.
Claim 8
Dependent Claim
11 words
A method according to claim 1, where the halosilane is trimethylchlorosilane.
Claim 9
Dependent Claim
25 words
A method according to claim 1, where the mixture comprises abcut one to 15 moles of diethylene glycol dibutyl ether per mole of allyl halide.
Claim 10
Dependent Claim
25 words
A method according to claim 1, where the mixture comprises about one to 10 moles of diethylene glycol dibutyl ether per mole of allyl halide.
Claim 11
Dependent Claim
25 words
A method according to claim 1, where the mixture comprises about one to five moles of diethylene glycol dibutyl ether per mole of allyl halide.
Claim 12
Dependent Claim
20 words
A method according to claim 1, where the temperature is within a range of about 30° C. to 170° C.
Claim 13
Dependent Claim
29 words
A method according to claim 1, where the mole ratio of the allyl halide to the halosilane in the mixture is within a range of about 0.1 to 10.
Claim 14
Dependent Claim
29 words
A method according to claim 1, where the mole ratio of the allyl halide to the halosilane in the mixture is within a range of about 0.8 to three.
Claim 15
Dependent Claim
80 words
A one step method for preparation of allylsilanes, the method comprising contacting magnesium metal with a mixture comprising allyl chloride, one to five moles of diethylene glycol dibutyl ether per mole of allyl chloride, and a halosilane selected from a group consisting of trimethylchlorosilane, dimethylchlorosilane, methyldichlorosilane, dimethyldichlorosilane, and methyltrichlorosilane, where the mole ratio of allyl chloride to halosilane is within a range of about 0.8 to three, at a temperature within a range of about 30° C. to 170° C.
Claim 16
Dependent Claim
80 words
A one step method for preparation of allylsilanes, the method comprising contacting magnesium metal with a mixture comprising allyl chloride, one to five moles of diethylene glycol dibutyl ether per mole of allyl chloride, and a halosilane selected from a group consisting of trimethylchlorosilane, dimethylchlorosilane, methyldichlorosilane, dimethyldichlorosilane, and methyltrichlorosilane, where the mole ratio of allyl chloride to halosilane is within a range of about 0.8 to three, at a temperature within a range of about 30° C. to 170° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-12 | 2000-11-11 | 2001-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-12 | 2004-11-11 | 2005-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-12 | 2008-11-11 | 2009-05-13 | $7700.00 | Window Closed / Lapsed |