Metal corrosion inhibitor

Patent metadata

Field	Value
Publication number	US-11168402-B2
Application number	US-201916638690-A
Country	US
Kind code	B2
Filing date	Feb 18, 2019
Priority date	Feb 16, 2018
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

The present invention provides a novel metal corrosion inhibitor containing a compound having a specific structure. The present invention relates to a metal corrosion inhibitor including a compound (X) including one molecule of a mercaptocarboxylic acid or a mercaptocarboxylic acid salt; one molecule of acrylic acid, an acrylic acid salt, or an acrylic acid ester; and one molecule of a monomer (B) represented by the following formula (1), which are bonded to each other:

First claim

The invention claimed is:

1. A metal corrosion inhibitor comprising:
a compound (X),

represented by the following formula (2):

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; x is 0 to 4; R 5 is a C1-C4 divalent hydrocarbon group; M 1 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, or an organic amine group; M 2 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, an organic amine group, or a C1-C30 hydrocarbon group.

2. The metal corrosion inhibitor according to claim 1 , wherein the compound (X) is a compound obtained by reacting an addition reaction product of compound (B) represented by the following formula (1) and acrylic acid, an acrylic acid salt, or an acrylic acid ester with the thiol group of a mercaptocarboxylic acid or a mercaptocarboxylic acid salt:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; and x is 0 to 4.

3. A composition comprising:
a carboxyl group-containing polymer; and
a compound (X),
wherein the compound (X) is represented by the following formula (2):

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; x is 0 to 4; R 5 is a C1-C4 divalent hydrocarbon group; M 1 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, or an organic amine group; M 2 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, an organic amine group, or a C1-C30 hydrocarbon group, and
the compound (X) is present in an amount of from 0.01 to 5 mass % relative to 100 mass % of the carboxyl group-containing polymer.

4. The composition according to claim 3 ,
wherein the compound (X) is present in an amount of 1.5 to 5 mass % relative to 100 mass % of the carboxyl group-containing polymer.

5. The composition according to claim 3 , wherein the compound (X) is a compound obtained by reacting an addition reaction product of compound (B) represented by the following formula (1) and acrylic acid, an acrylic acid salt, or an acrylic acid ester with the thiol group of a mercaptocarboxylic acid or a mercaptocarboxylic acid salt:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; and x is 0 to 4.

6. A method for storing and/or transporting a carboxyl group-containing polymer, the method comprising:
mixing a compound (X) with the carboxyl group-containing polymer so that a concentration of the compound (X) is 50 to 30000 ppm; and
placing the mixture of the carboxyl group-containing polymer and the compound (X) in a container for storing and/or transporting,

wherein the compound (X) is a compound represented by the following formula (2):

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; x is 0 to 4; R 5 is a C1-C4 divalent hydrocarbon group; M 1 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, or an organic amine group; M 2 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, an organic amine group, or a C1-C30 hydrocarbon group.

7. The method for storing and/or transporting a carboxyl group-containing polymer according to claim 6 ,
wherein the concentration of the compound (X) is 8000 to 30000 ppm.

8. The method according to claim 6 , wherein the compound (X) is a compound obtained by reacting an addition reaction product of compound (B) represented by the following formula (1) and acrylic acid, an acrylic acid salt, or an acrylic acid ester with the thiol group of a mercaptocarboxylic acid or a mercaptocarboxylic acid salt:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; and x is 0 to 4.

9. A method for inhibiting corrosion of a metal article by a carboxyl group-containing polymer, comprising:
exposing the metal article to a composition including the carboxyl group-containing polymer,
wherein the composition further comprises a compound (X) as a corrosion inhibitor,
wherein the compound (X) is a compound represented by the following formula (2):

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other and are each an oxyalkylene group; n is an average number of moles of the oxyalkylene group added and is 1 to 300; x is 0 to 4; R 5 is a C1-C4 divalent hydrocarbon group; M 1 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, or an organic amine group; M 2 is a hydrogen atom, a metal atom, an ammonium group, a quaternary ammonium group, an organic amine group, or a C1-C30 hydrocarbon group.

10. The method according to claim 9 , wherein the compound (X) is a compound obtained by reacting an addition reaction product of compound (B) represented by the following formula (1) and acrylic acid, an acrylic acid salt, or an acrylic acid ester with the thiol group of a mercaptocarboxylic acid or a mercaptocarboxylic acid salt:

wherein R 1 , R 2 , and R 3 are the same as or different from each other and are each a hydrogen atom or a methyl group; R 4 is a hydrogen atom or a C1-C30 hydrocarbon group; AOs are the same as or different from each other

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Takayama Takeshi
• Tonoya Masashi

Classifications

• C08F16/26

  Monomers containing oxygen atoms in addition to the ether oxygen · CPC title

• C08K5/38

  Thiocarbonic acids; Derivatives thereof, e.g. xanthates {; i.e. compounds containing -X-C(=X)- groups, X being oxygen or sulfur, at least one X being sulfur} · CPC title

• C08F216/1433

  Monomers containing side chains of polyethylene oxide groups · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C23F11/161 Primary

  Mercaptans · CPC title