Patent US4074013A successfully refreshed from Google Patents.
US4074013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrodible iron-containing surfaces carrying corrosion-inhibiting coating
Assignee: Henkel AG and Co KGaA
•
Filing: 1976-05-05
•
Granted: 1978-02-14
•
Expires: 1996-05-05
Abstract
Abstract Corrodible iron-containing metals (including steel) possess decreased tendency to corrode when contacted with aqueous media (including dilute strong mineral acids) when they carry a surface coating of mixtures of aminoalkanols of the formula: ##STR1## wherein R 1 and R 2 each represent a C 1-21 alkyl; and wherein the sum of the carbon atoms in R 1 and R 2 is 6 to 22. The vicinal ##STR2## substituents are non-terminal and are preferably uniformly distributed along the chain. The aminoalkanols are useful both in free base and in salt form.
Inventors
- 👤 Karlheinz Koch
- 👤 Gerhard Kolaczinski
- 👤 Wolfgang Rupilius
- 👤 Werner Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:46
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/142; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2030/00; C10N2030/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A shaped article having a surface of a corrodible iron-containing metal, said surface carrying a corrosion-inhibiting coating of a material selected from the group consisting of (A) mixtures of at least two amino-alkanols of the formula: ##STR6## wherein R 1 and R 2 each represent C 1-21 alkyl; and wherein the sum of the carbon atoms in R 1 and R 2 is between 6 and 22; and (B) salts thereof, the vicinal ##STR7## substituents being statistically distributed along the ##STR8## chain in accordance with known frequency of distribution curves.
Claim 2
Dependent Claim
90 words
A shaped article having a surface of a corrodible iron-containing metal, said surface carrying a corrosion-inhibiting coating of a material selected from the group consisting of (A) mixtures of at least two amino-alkanols of the formula: ##STR6## wherein R 1 and R 2 each represent C 1-21 alkyl; and wherein the sum of the carbon atoms in R 1 and R 2 is between 6 and 22; and (B) salts thereof, the vicinal ##STR7## substituents being statistically distributed along the ##STR8## chain in accordance with known frequency of distribution curves.
Claim 3
Dependent Claim
11 words
An article according to claim 1 wherein the surface is steel.
Claim 4
Dependent Claim
16 words
An article according to claim 1 wherein the mixture of aminoalkanols is present as a salt.
Claim 5
Dependent Claim
20 words
An article according to claim 3 wherein the mixture of aminoalkanols is present as a salt with an organic acid.
Claim 6
Dependent Claim
25 words
An article according to claim 1 wherein the sum of the carbon atoms in the R 1 and R 2 substituents is 9 to 12.
Claim 7
Dependent Claim
14 words
An article according to claim 1 wherein the coating is of substantially monomolecular thickness.
Claim 8
Dependent Claim
99 words
A process for inhibiting the tendency of a shaped article having a surface of a corrodible iron-containing metal to corrode when in contact with an aqueous medium, which comprises uniformly coating said surface with a corrosion-inhibiting material selected from the group consisting of (A) mixtures of at least two aminoalkanols of the formula: ##STR9## wherein R 1 and R 2 each represent C 1-21 alkyl; and wherein the sum of the carbon atoms in R 1 and R 2 is between 6 and 22; and (B) salts thereof, the vicinal ##STR10## substituents being distributed uniformly along the ##STR11## chain.
Claim 9
Dependent Claim
99 words
A process for inhibiting the tendency of a shaped article having a surface of a corrodible iron-containing metal to corrode when in contact with an aqueous medium, which comprises uniformly coating said surface with a corrosion-inhibiting material selected from the group consisting of (A) mixtures of at least two aminoalkanols of the formula: ##STR9## wherein R 1 and R 2 each represent C 1-21 alkyl; and wherein the sum of the carbon atoms in R 1 and R 2 is between 6 and 22; and (B) salts thereof, the vicinal ##STR10## substituents being distributed uniformly along the ##STR11## chain.
Claim 10
Dependent Claim
22 words
A process according to claim 7 wherein said corrosion-inhibiting material is coated on said surface in solution in an anhydrous organic solvent.
Claim 11
Dependent Claim
43 words
A process according to claim 8 wherein said corrosion-inhibiting material is coated on said surface as a free base in solution in an anhydrous organic solvent, and said surface is contacted with an acid whereby said free base is converted to salt form.
References Cited (Backward Citations)
US2587546A
Cited
US2856363A
Cited
US2914475A
Cited
US3033796A
Cited
US2918390A
Cited
US3766184A
Cited
US3723530A
Cited
US3872116A
Cited
US3953512A
Cited
US3897349A
Cited
US3974323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |