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Antirust agent

A rust inhibitor, the technology of carbon atom number, applied in the direction of anti-corrosion composition, detergent composition, non-surface-active detergent composition, etc., can solve the problems of inability to prevent rust, rust, not easy to be completely replaced by oxygen, etc. , to achieve the effect of saving time and reagent costs and reducing reagent costs

Inactive Publication Date: 2007-10-10
MITSUBISHI GAS CHEM CO INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a desiccant method does not prevent rust even if it is completely dehumidified, and rust will be caused by the penetration of oxygen and moisture from the packaging material over time
[0003] In the conventional method of packaging with wrapping paper impregnated with a vaporizing antirust agent such as dicyclohexyl ammonium nitrate, it takes time for the antirust agent to vaporize and exert its antirust effect, and the antirust ingredient adheres to the surface of the metal parts. Therefore, the cleanliness of the surface of metal parts is significantly reduced, and it cannot be used to preserve precision parts, etc.
The method of packaging with a packaging resin (film) containing a gasification antirust agent will lose efficacy due to the volatilization of the gasification antirust agent during the production process of the packaging resin, and the gasification antirust agent contained in the resin Difficult to vaporize, so the anti-rust effect is not sufficient when used in packaging
[0004] It is not easy to completely replace the oxygen in the storage container by replacing it with inert gas such as nitrogen or argon, and even if it is completely replaced, oxygen or moisture will pass through the packaging material over time, causing rust
Therefore, with the above-mentioned conventional methods, when metal parts are stored for a long period of time, the surface of the metal parts cannot be kept clean and rust cannot be prevented, so it is desired to develop a solution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 82 parts of polyethylene glycol diglycidyl ether (Denakol EX-841, manufactured by Nagase Chemical Co., Ltd., epoxy equivalent: 370 g / eq) and 2 parts of glycerin poly(ethylene glycol) previously heated to 60° C. Glycidyl ether (デナコール EX-313, manufactured by Nagase Chemical Co., Ltd., epoxy equivalent: 141g / eq) (epoxy equivalent: active hydrogen equivalent = 1:2.0) was added to a 500 ml beaker, and further 0.1 Parts of benzyldimethylamine as a curing accelerator, mixed and stirred. 16 parts of m-xylylenediamine (active hydrogen equivalent: 34 g / eq) was added thereto, and further stirred. This mixed solution was poured into an aluminum molding die, heated at 80° C. for 1 hour in a desiccator, and then heated to 120° C. for 1 hour to obtain a cured resin. The resin cured product was pulverized in a mortar, and 3 g of the pulverized product was immersed in 100 ml of a 5% by weight aqueous solution of hydroxylamine at 25° C. for 24 hours. Then, the water-absorbing resin cur...

Embodiment 2

[0042] The same procedure as in Example 1 was carried out except that 5% by weight of hydrazine was used instead of 5% by weight of hydroxylamine. Table 1 shows the results of the gasification rust prevention test.

Embodiment 3

[0044] Except that 5% by weight of N,N-diethylhydroxylamine was used instead of 5% by weight of hydroxylamine, the same procedure was carried out as in Example 1. Table 1 shows the results of the gasification rust prevention test.

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Abstract

Disclosed is an antirust agent for protecting the surface of a metal member from rust while maintaining the surface clean during long-time storage. Also disclosed is a method for preventing rust. Specifically disclosed is an antirust agent characterized by containing a hydroxylamine compound represented by the formula (1) below or a hydrazine compound represented by the formula (2) below and a water-absorbing resin. Also disclosed is an antirust obtained by wrapping the antirust agent with an air-permeable material. Further disclosed is a method for preventing rust which is characterized by storing a metal member in a gas-barrier container together with the wrapped antirust agent. In the formula (1) below, R<1>, R<2> and R<3> respectively represent a hydrogen atom, an alkyl group having 1-6 carbon atoms or an alkenyl group having 2-4 carbon atoms; and these groups may have a substituent. In the formula (2) below, R<1>, R<2>, R<3> and R<4> respectively represent a hydrogen atom, an alkyl group having 1-6 carbon atoms or an alkenyl group having 2-4 carbon atoms; and these groups may have a substituent.

Description

technical field [0001] The invention relates to an antirust agent and an antirust method which have a good effect of inhibiting rust on metal materials in storage. Background technique [0002] As a method of preventing rust caused by dew condensation during storage of metal parts, there are methods of sealing and packaging metal parts with a desiccant, packaging with wrapping paper impregnated with a vaporizing antirust agent, and using A method of packaging with a packaging resin (film) containing a gasifying antirust agent (see Patent Document 1). In addition, there is a method of replacing the inside of the storage container of the metal parts with an inert gas. With the desiccant method, even complete dehumidification cannot prevent rusting, and over time, oxygen and moisture will permeate through the packaging material, causing rusting. [0003] In the conventional method of packaging with wrapping paper impregnated with a vaporizing antirust agent such as dicyclohex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/00C23F11/14
CPCC09D5/086C11D3/0073C11D7/3209C11D7/3218C11D11/0023C23F11/02C11D2111/14C23F11/00C23F11/14
Inventor 高桥健一
Owner MITSUBISHI GAS CHEM CO INC
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