Detergent composition for metal product and method for cleaning metal product using said detergent composition

Patent metadata

Field	Value
Publication number	US-12060540-B2
Application number	US-202017425456-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Jan 25, 2019
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A detergent composition for metal product, which contains an amine (component A) represented by a general formula (I), a salt (component B′) of a dicarboxylic acid (component B) represented by a general formula (II): HOOC—R4—COOH (II) and the amine (component A), a salt (component C′) of a monocarboxylic acid (component C) represented by a general formula (III): R5—COOH (III) and the amine (component A), a nonionic surfactant (component D) represented by a general formula (IV): R6—O-{(EO)n/(PO)m}-H (IV), and water (component E) and has a pH of more than 7 and 10 or less. The detergent composition for metal product exhibits excellent detergency and metal corrosion suppressing performance.

First claim

The invention claimed is:

1. A detergent composition for metal product, prepared by blending at least an amine, a carboxylic acid, a nonionic surfactant (component D), and water (component E),
the amine comprises an amine (component A) represented by general formula (I):

in the general formula (I), R 1 and R 2 are each independently a hydrogen atom, an alkyl group having 1 or more and 6 or less carbon atoms, a phenyl group, a benzyl group, an aminoethyl group, a hydroxyethyl group, or a hydroxypropyl group and R 3 is a hydroxyethyl group or a hydroxypropyl group;
the carboxylic acid consists of a dicarboxylic acid (component B) represented by general formula (II):
HOOC—R 4 —COOH  (II)

in the general formula (II), R 4 is an alkylene group having 10 or more and 12 or less carbon atoms, and
a monocarboxylic acid (component C) represented by the general formula (III):
R 5 —COOH  (III)

in the general formula (III), R 5 is a linear or branched alkyl group or alkenyl group having 13 or more and 21 or less carbon atoms;
the nonionic surfactant (component D) is a nonionic surfactant represented by general formula (IV):
R 6 —O-{(EO) n /(PO) m }-H  (IV)

in the general formula (IV), R 6 is a secondary alkyl group having 12 or more and 18 or less carbon atoms, EO is an ethyleneoxy group, PO is a propyleneoxy group, n is an average number of moles of EO added, m is an average number of moles of PO added, n is a number 2 or more and 20 or less, m is a number 0 or more and 20 or less, and forms of PO and EO added in curly brackets may be either random arrangement or block arrangement; wherein
a pH of the detergent composition for metal product is more than 7 and 10 or less.

2. The detergent composition for metal product according to claim 1 , wherein a content of the amine (component A) represented by formula (I) is 0.01% by mass or more and 1.0% by mass or less, a content of a component B′ which is a salt of the dicarboxylic acid (component B) represented by formula (II) and the amine (component A) is 0.01% by mass or more and 1.2% by mass or less, a content of a component C′ which is a salt of the monocarboxylic acid (component C) represented by the general formula (III) and the amine (component A) is 0.005% by mass or more and 0.5% by mass or less, and a content of the component D is 0.001% by mass or more and 0.12% by mass or less.

3. The detergent composition for metal product according to claim 1 , wherein a content of the component E is 75% by mass or more and 99.97% by mass or less.

4. The detergent composition for metal product according to claim 1 , wherein a mass ratio (component B′/component C′) of the salt (component B′) of the dicarboxylic acid (component B) and the amine (component A) to the salt (component C′) of the monocarboxylic acid (component C) and the amine (component A) is 0.01 or more and 100 or less.

5. The detergent composition for metal product according to claim 1 , wherein the salt (component B′) of the dicarboxylic acid (component B) and the amine (component A) is selected from 1,10-decanedicarboxylic acid diethanolamine salt, 1,11-undecanedicarboxylic acid diethanolamine salt, 1,12-dodecanedicarboxylic acid diethanolamine salt, 1,10-decanedicarboxylic acid triethanolamine salt, 1,11-undecanedicarboxylic acid triethanolamine salt, 1,12-dodecanedicarboxylic acid triethanolamine salt, or mixtures thereof.

6. The detergent composition for metal product according to claim 1 , wherein the salt (component C′) of the monocarboxylic acid (component C) and the amine (component A) is selected from myristic acid diethanolamine salt, stearic acid diethanolamine salt, oleic acid diethanolamine salt, linoleic acid diethanolamine salt, myristic acid triethanolamine salt, stearic acid triethanolamine salt, oleic acid triethanolamine salt, linoleic acid triethanolamine salt, or mixtures thereof.

7. A method for cleaning a metal product, the method comprising a step of cleaning a by contacting the metal product with the detergent composition for metal product according to claim 1 .

8. The method for cleaning a metal product according to claim 7 , wherein a rinsing treatment is not performed after the cleaning step.

9. The method for cleaning a metal product according to claim 7 , wherein a cleaning means in the cleaning step is spray cleaning.

10. The method for cleaning a metal product according to claim 7 , wherein the metal product is an iron-based metal part obtained using an iron-based metal containing iron as a main component as a raw material or a non-ferrous metal part obtained using a non-ferrous metal alloy containing a non-ferrous metal as a main component as a raw material.

11. The method for cleaning a metal product according to claim 7 , wherein the metal product comprises an iron-based metal part and a non-ferrous metal part and the iron-based metal part and the non-ferrous metal part are cleaned at the same time in the cleaning step.

12. The method for cleaning a metal product according to claim 11 , which comprises:
an assembly step of assembling the iron-based metal part and the non-ferrous metal part which are separately manufactured to assemble a metal product;
a cleaning step of simultaneously cleaning the assembled metal product as a unit; and
a drying step of performing drying while removing excess of the detergent composition for metal product by air blow.

13. The method for cleaning a metal product according to claim 12 , wherein hydraulic oil for operating the metal product is added in an interior of the metal product and the method comprises a hydraulic oil filling step of adding the hydraulic oil before the cleaning step.

14. The method for cleaning a metal product according to claim 13 , which comprises an inspection step of confirming operation of the metal product between the hydraulic oil filling step and the cleaning step.

15. The method for cleaning a metal product according to claim 14 , wherein the metal product is an automatic transmission.

16. The method for cleaning a metal product according to claim 7 , wherein the metal product is a jig for transporting another metal product.

Assignees

• Kao Corp
• Aisin Corp

Inventors

• Naganuma Jun
• Hisano Takayuki
• Kobayashi Takao

Classifications

• C11D3/2075

  Carboxylic acids-salts thereof · CPC title

• C11D1/72

  Ethers of polyoxyalkylene glycols · CPC title

• C11D2111/20

  Industrial or commercial equipment, e.g. reactors, tubes or engines · CPC title

• C11D2111/16

  Metals · CPC title

• C11D17/0008

  aqueous liquid non soap compositions (C11D3/0015, C11D3/3947, C11D3/3956 take precedence) · CPC title