US4239648A
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Telomeric phosphorus corrosion inhibiting compositions
Assignee: FMC Corp
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Filing: 1979-07-12
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Granted: 1980-12-16
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Expires: 1999-07-12
Abstract
Abstract Compositions useful for inhibiting the corrosion of ferrous metals in contact with aqueous systems comprise (a) a telomeric compound of formula: ##STR1## or salts thereof, wherein R 11 is hydrogen or a methyl or ethyl residue; R is hydrogen, a straight- or branched alkyl residue having from 1-18 carbon atoms, a cycloalkyl residue having from 5-12 carbon atoms, an aryl residue, an aralkyl residue, a residue of formula: ##STR2## wherein R 11 has its previous significance; and the sum of n+m is an integer of at most 100; or a residue --OX wherein X is hydrogen or a straight- or branched alkyl residue having 1-4 carbon atoms and R 1 is a residue --OX, wherein X has its previous significance.
Inventors
- 👤 Alan Marshall
- 👤 Norman Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:24
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C02F5/145; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
154 words
A composition for inhibiting the corrosion of ferrous metal in contact with aqueous systems comprising (a) a product comprising a telomeric compound of the formula: ##STR8## and salts thereof, wherein R" is hydrogen or a methyl or ethyl residue, R is hydrogen, a straight- or branched alkyl residue, having from 1 to 18 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aryl residue, an aralkyl residue, a residue of formula: ##STR9## wherein R" has its previous significance and the sum n+m is zero or an integer of at the most 100, or a residue--OX wherein X is hydrogen or a straight- or branched alkyl residue having from 1 to 4 carbon atoms and R' is a residue--OX wherein X has its previous significance; or a salt thereof; and (b) one or more compounds selected from: (i) a zinc salt (ii) a polyphosphate (iii) a silicate and/or (iv) a molybdate.
Claim 2
Dependent Claim
154 words
A composition for inhibiting the corrosion of ferrous metal in contact with aqueous systems comprising (a) a product comprising a telomeric compound of the formula: ##STR8## and salts thereof, wherein R" is hydrogen or a methyl or ethyl residue, R is hydrogen, a straight- or branched alkyl residue, having from 1 to 18 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aryl residue, an aralkyl residue, a residue of formula: ##STR9## wherein R" has its previous significance and the sum n+m is zero or an integer of at the most 100, or a residue--OX wherein X is hydrogen or a straight- or branched alkyl residue having from 1 to 4 carbon atoms and R' is a residue--OX wherein X has its previous significance; or a salt thereof; and (b) one or more compounds selected from: (i) a zinc salt (ii) a polyphosphate (iii) a silicate and/or (iv) a molybdate.
Claim 3
Dependent Claim
26 words
A composition as claimed in claim 1 wherein R" is hydrogen and the sum of m and n is zero or an integer up to 60.
Claim 4
Dependent Claim
29 words
A composition as claimed in claim 1 or 2 wherein R is hydrogen or a residue of formula: ##STR10## wherein R" and m are as defined in claim 1.
Claim 5
Dependent Claim
53 words
A composition as claimed in claim 3 wherein R is hydrogen or a residue of formula: ##STR11## wherein R" is hydrogen and m is zero or an integer of up to 30; R' is OX wherein X is hydrogen or a water-solubilizing cation; and n is zero or an integer up to 30.
Claim 6
Dependent Claim
15 words
A composition as claimed in claim 1 wherein component (b) is a water-soluble zinc salt.
Claim 7
Dependent Claim
21 words
A composition as claimed in claim 5 wherein the zinc salt is zinc borate, zinc chloride, zinc nitrate or zinc sulphate.
Claim 8
Dependent Claim
17 words
A composition as claimed in claim 1 wherein component (b) is a water-soluble polyphosphate, silicate or molybdate.
Claim 9
Dependent Claim
17 words
A composition as claimed in claim 7 wherein the water soluble salt is an alkali metal salt.
Claim 10
Dependent Claim
18 words
A composition as claimed in claim 8 wherein the alkali metal salt is a sodium or potassium salt.
Claim 11
Dependent Claim
23 words
A composition as claimed in claim 1 wherein the ratio of component (a) to component (b) is from 10-99% to 90 to 1%.
Claim 12
Dependent Claim
29 words
A composition as claimed in claim 10 wherein a zinc salt is the sole component (b) and the ratio of component (a) to component (b) is 40-85% to 60-15%.
Claim 13
Dependent Claim
20 words
A composition as claimed in claim 11 wherein the ratio of component (a) to component (b) is 80% to 20%.
Claim 14
Dependent Claim
33 words
A composition as claimed in claim 10 wherein a polyphosphate is used as sole component (b) and the ratio of component (a) to component (b) is 10 to 70% to 90 to 30%.
Claim 15
Dependent Claim
20 words
A composition as claimed in claim 13 wherein the ratio of component (a) to component (b) is 40% to 60%.
Claim 16
Dependent Claim
19 words
A composition as claimed in claim 1 wherein a further dispersing agent/or threshold agent and/or antifoaming agent is present.
Claim 17
Dependent Claim
32 words
A method of inhibiting the corrosion of ferrous metals in contact with an aqueous system comprising adding to the aqueous system a minor proportion of a composition as claimed in claim 1.
Claim 18
Dependent Claim
21 words
A method as claimed in claim 16 wherein the amount of the corrosion-inhibiting composition added is from 0.1 to 500 ppm.
Claim 19
Dependent Claim
21 words
A method as claimed in claim 17 wherein the amount of the corrosion-inhibiting composition added is from 1 to 200 ppm.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |