US4367154A
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Glycol compositions containing a phosphorous-modified silane
Assignee: Dow Chemical Co
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Filing: 1981-07-29
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Granted: 1983-01-04
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Expires: 2001-07-29
Abstract
Abstract Glycol concentrates containing alkali metal silicates are rendered gellation resistant by the addition of phosphonates having one of the formulas, (I) (RO)3-m(R')mSi-R2-O-P(O) (OR3)(R4), (II) [(RO)3-m(R')mSi-R2-O-2 P(O)(R4) or (III) mixtures of I and II, wherein m is 0-2 R, R3, R4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R2 is an alkylene group of 1-4 carbons.
Inventors
- 👤 Robert T. Jernigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
116 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount of one of the following: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4) (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 2
Dependent Claim
116 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount of one of the following: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4) (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the alkylene glycol is ethylene glycol.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the alkylene glycol is propylene glycol.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein the alkylene glycol is the monomethyl ether of propylene glycol.
Claim 6
Dependent Claim
120 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) an effective amount of one of the following: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 7
Dependent Claim
120 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) an effective amount to reduce corrosion of an alkali metal borate, (C) an effective amount to reduce corrosion of an alkali metal silicate, (D) an effective amount of one of the following: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 8
Dependent Claim
12 words
The composition of claim 5 wherein the alkylene glycol is ethylene glycol.
Claim 9
Dependent Claim
12 words
The composition of claim 5 wherein the alkylene glycol is propylene glycol.
Claim 10
Dependent Claim
15 words
The composition of claim 5 wherein R is a methyl group and m is zero.
Claim 11
Dependent Claim
123 words
A corrosion and gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) 0.1 to 2.0 percent by weight of an alkali metal borate (C) 0.025 to 1.0 percent by weight of an alkali metal silicate, (D) an effective amount of one of the following silanes: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 12
Dependent Claim
123 words
A corrosion and gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) 0.1 to 2.0 percent by weight of an alkali metal borate (C) 0.025 to 1.0 percent by weight of an alkali metal silicate, (D) an effective amount of one of the following silanes: (I) (RO) 3-m (R') m Si--R 2 --O--P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 13
Dependent Claim
19 words
The composition of claim 9 wherein the amount of said silane used is 0.001 to 5.0 percent by weight.
Claim 14
Dependent Claim
19 words
The composition of claim 9 wherein the amount of said silane used is 0.002 to 0.5 percent by weight.
Claim 15
Dependent Claim
15 words
The composition of claim 9 wherein R is a methyl group and m is zero.
Claim 16
Independent Claim
106 words
A method for making gellation resistant glycol compositions containing alkali metal silicates; and other corrosion inhibitors which comprises adding to the glycol compositions an effective amount to improve gellation resistance of the compounds having the formulas, (I) (RO) 3-m (R') m Si--R 2 --O-P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 17
Independent Claim
106 words
A method for making gellation resistant glycol compositions containing alkali metal silicates; and other corrosion inhibitors which comprises adding to the glycol compositions an effective amount to improve gellation resistance of the compounds having the formulas, (I) (RO) 3-m (R') m Si--R 2 --O-P(O)(OR 3 )(R 4 ), (II) [(RO) 3-m (R') m Si--R 2 --O--] 2 P(O)(R4), or (III) mixtures of I and II, wherein m is 0-2 R, R 3 , R 4 are alkyl groups of 1-4 carbons, R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, and R 2 is an alkylene group of 1-4 carbons.
Claim 18
Dependent Claim
18 words
The method as set forth in claim 13 wherein R is a methyl group and m is zero.
Claim 19
Dependent Claim
15 words
The method as set forth in claim 13 wherein the alkylene glycol is ethylene glycol.
Claim 20
Dependent Claim
9 words
The product produced by the method of claim 13.
Claim 21
Dependent Claim
9 words
The product produced by the method of claim 14.
Claim 22
Dependent Claim
9 words
The product produced by the method of claim 15.
Claim 23
Dependent Claim
91 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount of one of the following: (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O--] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 24
Dependent Claim
91 words
A gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, an alkylene glycol ether, or mixtures thereof, (B) an effective amount to reduce corrosion of an alkali metal silicate, (C) an effective amount of one of the following: (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O--] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 25
Dependent Claim
12 words
The composition of claim 19 wherein the alkylene glycol is ethylene glycol.
Claim 26
Dependent Claim
17 words
The composition of claim 19 wherein the alkylene glycol ether is the monomethyl ether of propylene glycol.
Claim 27
Dependent Claim
15 words
The composition of claim 19 wherein R is a methyl group and n is 3.
Claim 28
Dependent Claim
99 words
A corrosion and gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) 0.1 to 2.0 percent by weight of an alkali metal borate (C) 0.025 to 1.0 percent by weight of an alkali metal silicate, (D) an effective amount of one of the following silanes: (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O--] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 29
Dependent Claim
99 words
A corrosion and gellation resistant glycol composition comprising (A) 85 to 98 percent by weight of an alkylene glycol, (B) 0.1 to 2.0 percent by weight of an alkali metal borate (C) 0.025 to 1.0 percent by weight of an alkali metal silicate, (D) an effective amount of one of the following silanes: (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O--] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 30
Dependent Claim
19 words
The composition of claim 23 wherein the amount of said silane used is 0.001 to 5.0 percent by weight.
Claim 31
Dependent Claim
19 words
The composition of claim 23 wherein the amount of said silane used is 0.002 to 0.5 percent by weight.
Claim 32
Dependent Claim
15 words
The composition of claim 23 wherein R is a methyl group and n is 3.
Claim 33
Dependent Claim
12 words
The composition of claim 23 wherein the alkylene glycol is ethylene glycol.
Claim 34
Independent Claim
93 words
A method for making a gellation resistant glycol composition containing alkali metal silicates, and other corrosion inhibitors which comprises adding to the glycol compositions before or during the addition of the alkali metal silicates an effective amount to improve gellation resistance of the compounds having the formulas, (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 35
Independent Claim
93 words
A method for making a gellation resistant glycol composition containing alkali metal silicates, and other corrosion inhibitors which comprises adding to the glycol compositions before or during the addition of the alkali metal silicates an effective amount to improve gellation resistance of the compounds having the formulas, (I) (RO) 3 Si--(CH 2 ) n O-P(O)(CH 3 )--OR, (II) [(RO) 3 Si--(CH 2 ) n O] 2 --P(O)(CH 3 ), or (III) mixtures of I and II, wherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4.
Claim 36
Dependent Claim
18 words
The method as set forth in claim 28 wherein R is a methyl group and n is 3.
Claim 37
Dependent Claim
15 words
The method as set forth in claim 28 wherein the alkylene glycol is ethylene glycol.
Claim 38
Dependent Claim
9 words
The product produced by the method of claim 28.
Claim 39
Dependent Claim
9 words
The product produced by the method of claim 29.
Claim 40
Dependent Claim
9 words
The product produced by the method of claim 30.
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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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |