Patent US3706326A successfully refreshed from Google Patents.
Patent US4618688A successfully refreshed from Google Patents.
US4618688A
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US
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Silane compositions
Assignee: PCR Inc
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Filing: 1985-04-12
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Granted: 1986-10-21
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Expires: 2005-04-12
Abstract
Abstract There is provided a novel class of alkoxy silanes useful as corrosion inhibitors for metal surfaces and characterized by an alkylene group attached to silicon through a Si--C linkage. These compounds also contain nitrogen as an amine or an imine group in a linear or cyclic structure. Sulfur and/or a carbonyl or thiocarbonyl group may also be present. The invention also provides a method of inhibiting corrosion of metal surfaces by applying a coating containing or consisting of a novel silane as above described.
Inventors
- 👤 Ralph J. DePasquale
- 👤 James M. Evans
- 👤 Paul W. Kremer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
105 words
A silane having the general formula: ##STR3## wherein R and R 1 are independently selected from alkyl groups containing from 1 to 3 carbon atoms; X is selected from (a) chalcogens, (b) NCH 2 CH 2 Y, where Y is N-saturated or N-unsaturated C 1 -C 20 alkyl or cycloalkyl, (c) N--C 6 H 4 -ortho-Y where Y is S; Q is CH 2 S; and, when X is chalcogen, Y is selected from NH--CH 2 CH 2 CH 2 N(CH 3 ) 2 , and NHNH 2 ; m is zero to 3, y is 1 to 3, and n is zero to 1.
Claim 2
Dependent Claim
105 words
A silane having the general formula: ##STR3## wherein R and R 1 are independently selected from alkyl groups containing from 1 to 3 carbon atoms; X is selected from (a) chalcogens, (b) NCH 2 CH 2 Y, where Y is N-saturated or N-unsaturated C 1 -C 20 alkyl or cycloalkyl, (c) N--C 6 H 4 -ortho-Y where Y is S; Q is CH 2 S; and, when X is chalcogen, Y is selected from NH--CH 2 CH 2 CH 2 N(CH 3 ) 2 , and NHNH 2 ; m is zero to 3, y is 1 to 3, and n is zero to 1.
Claim 3
Dependent Claim
11 words
A silane as defined in claim 1 wherein m is O.
Claim 4
Dependent Claim
11 words
A silane as defined in claim 1 wherein m is 3.
Claim 5
Dependent Claim
11 words
A silane as defined in claim 1 wherein y is 3.
Claim 6
Dependent Claim
11 words
A silane as defined in claim 1 wherein n is 0.
Claim 7
Dependent Claim
11 words
A silane as defined in claim 1 wherein X is oxygen.
Claim 8
Dependent Claim
11 words
A silane as defined in claim 1 wherein X is sulfur.
Claim 9
Dependent Claim
18 words
A silane as defined in claim 1 wherein m is 0, y is 3 and n is 0.
Claim 10
Dependent Claim
18 words
A silane as defined in claim 1 wherein m is 1, y is 3 and n is 0.
Claim 11
Dependent Claim
21 words
A silane as defined in claim 1 wherein m is 0, y is 3, n is 0 and X is oxygen.
Claim 12
Dependent Claim
10 words
A silane as defined in claim 1 which is beta-(triethoxysilyl)-N-octadecylpropionamide.
Claim 13
Dependent Claim
10 words
A silane as defined in claim 1 which is beta-(trimethoxysilyl)-N-octadecylpropionamide.
Claim 14
Dependent Claim
1 words
3-(2-Mercaptobenzothiazole)propyltriethoxysilane.
Claim 15
Dependent Claim
1 words
3-(2-Mercaptobenzothiazole)propyltriethoxysilane.
Claim 16
Dependent Claim
10 words
A silane as defined in claim 1 which is N-(3-Dimethylaminopropyl)carboxamidoethyltriethoxysilane.
Claim 17
Dependent Claim
1 words
1-Octadecyl-2-(beta-triethoxysilylethyl)-4,5-dihydroimidazole.
Claim 18
Dependent Claim
1 words
1-Octadecyl-2-(beta-triethoxysilylethyl)-4,5-dihydroimidazole.
Claim 19
Dependent Claim
1 words
N-Octadecyl-S-(3-trimethoxysilylpropyl)thiocarbamate.
Claim 20
Dependent Claim
1 words
N-Octadecyl-S-(3-trimethoxysilylpropyl)thiocarbamate.
Claim 21
Independent Claim
134 words
The method of improving the resistance of a metal substrate to corrosion which comprises applying to the surface thereof a silane having the general formula: ##STR4## wherein R and R 1 are independently selected from alkyl groups containing from 1 to 3 carbon atoms; X is selected from (a) chalcogens, (b) NCH 2 CH 2 Y, where Y is N-saturated or N-unsaturated C 1 -C 20 alkyl or cycloalkyl, (c) N--C 6 H 4 -ortho-Y where Y is S; Q is CH 2 S; and, when X is chalcogen, Y is selected from NH-saturated or NH-unsaturated C 1 -C 20 alkyl or cycloalkyl, NH--CH 2 CH 2 CH 2 N(CH 3 ) 2 , and NHNH 2 ; m is zero to 3, y is 1 to 3, and n is zero to 1.
Claim 22
Independent Claim
134 words
The method of improving the resistance of a metal substrate to corrosion which comprises applying to the surface thereof a silane having the general formula: ##STR4## wherein R and R 1 are independently selected from alkyl groups containing from 1 to 3 carbon atoms; X is selected from (a) chalcogens, (b) NCH 2 CH 2 Y, where Y is N-saturated or N-unsaturated C 1 -C 20 alkyl or cycloalkyl, (c) N--C 6 H 4 -ortho-Y where Y is S; Q is CH 2 S; and, when X is chalcogen, Y is selected from NH-saturated or NH-unsaturated C 1 -C 20 alkyl or cycloalkyl, NH--CH 2 CH 2 CH 2 N(CH 3 ) 2 , and NHNH 2 ; m is zero to 3, y is 1 to 3, and n is zero to 1.
Claim 23
Dependent Claim
10 words
The method of claim 17 wherein the silane is beta-triethoxysilyl)-N-octadecylpropionamide.
Claim 24
Dependent Claim
38 words
A method as defined in claim 17 wherein R is methyl or ethyl, m is O, y is 3, n is O, X is oxygen and Y is NH-saturated or NH-unsaturated C 1 -C 20 alkyl or cycloalkyl.
Claim 25
Dependent Claim
13 words
A method as defined in claim 19 wherein Y is N-octadecyl, or N-octadecenyl.
Claim 26
Dependent Claim
42 words
A method as defined in claim 17 wherein R is methyl or ethyl, m is 1, y is 3, R 1 is methyl n is O, X is oxygen and Y is NH-saturated or NH-unsaturated C 1 -C 20 alkyl or cycloalkyl.
Claim 27
Dependent Claim
13 words
A method as defined in claim 21 wherein Y is N-octadecyl or N-octadecenyl.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |