# US 4,393,026 A · Compounds containing sulfur and amino groups

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- Number: US 4,393,026 A
- Document ID: US4393026A
- Status: Granted
- Kind: A
- Application number: 06/320,048
- Filed: 1981-11-10
- Granted: 1983-07-12
- Earliest claimed: 1980-06-19
- Assignees: Petrolite Corporation
- Inventors: Neil E. S. Thompson; Derek Redmore; Bernardus A. Oude Alink; Benjamin T. Outlaw
- Web page: https://patentgrep.com/patent/US4393026A

## CPC

- C23F 11/16: Sulfur-containing compounds
- C07D 233/20: with substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C09K 8/54: Compositions for in situ inhibition of corrosion in boreholes or wells
- C23G 1/065: {sulfur-containing compounds}
- C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C23G: CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

## Abstract

This invention relates to the following: (a) An amino-containing composition characterized by polymercapto groups, (2) A polyamino-containing composition characterized by mercapto or polymercapto groups, (3) A composition characterized by the presence of A. a mercapto or polymercapto groups, and B. a nitrogen-containing group characterized by at least one of the following: 1. an amido or a polyamido group, 2. a cyclic amidine or a polycyclic amidine group, 3. an epihalohydrin-derived amino-containing group. This invention also relates to the use of the above compositions as corrosion inhibitors.

## Claims

### Claim 1

A process for inhibiting corrosion which is characterized by treating a metal with a composition containing ##STR53## where R.sub.1 is a hydrocarbon group, R.sub.2, R.sub.3 are H or alkyl, R.sub.4, R.sub.5 are H, alkyl, alkanol, or --alkylene N).sub.n H, n, m or p are one or more, or mixtures thereof.

### Claim 2 (depends on 1)

The process of claim 1 wherein the composition has the formula, ##STR54## where R.sub.1 is a hydrocarbon group, R.sub.2, R.sub.3 are H or alkyl, R.sub.5 is H, alkyl, ##STR55## or alkanol, and n is one or more.

### Claim 3 (depends on 1)

The process of claim 1 wherein the composition has the formula, ##STR56## where R.sub.1 is a hydrocarbon group, R.sub.2 is H or alkyl, R.sub.4 is H, alkyl, alkanol, or ##STR57## and n is one or more.

### Claim 4 (depends on 1)

The process of claim 1 wherein the composition has the formula ##STR58## where R.sub.1 is a hydrocarbon group R.sub.2 is H or alkyl, and n, m and p are one or more.

### Claim 5 (depends on 2)

The process of claim 2 wherein the composition has the formula ##STR59## where R is H or methyl, R.sup.1 is H or --CH.sub.2 CH.sub.2 --OH, and n, m and p are one or more.

### Claim 6 (depends on 4)

The process of claim 4 wherein the composition has the formula ##STR60## where R is H or methyl, and n, m p and q are one or more.