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Polyamide-imide resin composition for lubricating coating material

A technology of polyamide-imide resin and polyamide-imide, applied in lubricating compositions, coatings, base materials, etc., can solve problems such as deterioration of storage stability of lubricating coatings, achieve long-term dissolution, excellent Excellent effect of heat resistance and adhesion

Active Publication Date: 2015-03-25
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These solvents are poor solvents for polyamideimide resins, and when added, precipitates or turbidity (kasumi) occur, and there is a problem that the storage stability of lubricating coatings deteriorates.

Method used

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  • Polyamide-imide resin composition for lubricating coating material
  • Polyamide-imide resin composition for lubricating coating material
  • Polyamide-imide resin composition for lubricating coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] In a 4-neck flask equipped with a nitrogen inlet pipe and a cooling device, add 192.1 g (1 mole) of trimellitic anhydride as an acid component, 165.5 g (0.95 mole) of toluene-2 ​​as an isocyanate component, and 165.5 g (0.95 mole) as The polymerization solvent is a solvent in which the mass ratio of γ-butyrolactone and 1,3-dimethyl-2-imidazolidinone is adjusted to 99 / 1 (hereinafter referred to as "adjusting solvent"), and the solid content The concentration was 25% by mass (the solid content concentration was calculated from the solid content (resin content) and the solvent amount in the state where the raw materials were reacted to undergo decarboxylation). Then, under nitrogen atmosphere, it was made to react at 130 degreeC for 5 hours, stirring, and the polyamide-imide resin was polymerized. Subsequently, the polyamide-imide resin solution was cooled, and diluted with the above-mentioned adjustment solution so that the solid content concentration of the polyamide-imi...

Embodiment 2～8

[0114] Except that all the acid components are set as 1 mole, all the isocyanate components are set as 0.95 moles, and the acid component, the isocyanate component and the adjustment solvent are changed to the composition of Table 1, all the other make the solid content concentration . Conditions, such as atmosphere and reaction time, were the same, and the polyamide-imide resin composition of Examples 2-8 were produced respectively. Table 1 shows the details of the polyamide-imide resin compositions of Examples 2 to 8, and Table 2 shows the evaluation results.

Embodiment 9

[0116] In a 4-neck flask equipped with a nitrogen inlet pipe and a cooling device, add 192.1 g (1 mole) of trimellitic anhydride as an acid component, 165.5 g (0.95 mole) of toluene-2,4-diisocyanate as an isocyanate component, and 821 g of N-methyl-2-pyrrolidone as a polymerization solvent was adjusted to a solid content concentration of 25% by weight, and reacted at 130° C. for 5 hours while stirring under a nitrogen atmosphere to polymerize a polyamide-imide resin. In addition, the solid content concentration was calculated from the solid content (resin content) and the solvent amount in the state which reacted and decarboxylated the raw material. Then, the polyamideimide resin solution was cooled, diluted with N-methyl-2-pyrrolidone so that the solid content concentration of the polyamideimide resin became 20% by weight, and the obtained polyamideimide resin was dilute with acetone. The polyamideimide resin in the composition is precipitated and precipitated, and after remo...

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Abstract

Provided is a polyamide-imide resin composition for lubricating coating materials which retains the excellent heat resistance (i.e., high glass transition temperature) and mechanical strength (i.e., high modulus) inherent in polyamide-imide resins and in which the resin has excellent solubility in the solvents including gamma-butyrolactone, which is a non-amide solvent, and the dissolved state can be maintained for a long time even when the solvents are in the state of being apt to easily absorb moisture. The polyamide-imide resin composition for lubricating coating materials is characterized by containing a polyamide-imide resin that contains the repeating unit represented by formula [I] in an amount of 50 mol% or more of all the repeating units contained in the structure of the polyamide-imide resin and by containing gamma-butyrolactone and 1,3-dimethyl-2-imidazolidinone as solvents.

Description

technical field [0001] The present invention relates to a polyamide-imide resin composition for lubricating paint, a paint containing the resin, and a sliding member coated with the paint. Background technique [0002] Polyamide-imide resins are widely used as electrical insulation coatings or coating materials for various substrates, coatings for sliding components ( Also known as "lubricant paint") binder resin. [0003] As a lubricating paint used for a sliding member, a composition obtained by mixing a solvent, a solid lubricant, an epoxy resin, and a fluororesin with a polyamide-imide resin is known. For example, Patent Documents 1 and 2 disclose resin compositions for lubricating paints using a polyamideimide resin as a binder. In addition, Patent Document 3 discloses a resin composition for a lubricating paint using a silicon-modified polyamide-imide resin as a binder. [0004] The resin composition for a lubricating coating is used to form a lubricating film by co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C10M107/44
CPCC08G73/1035C08G73/1067C08G73/14C09D179/08C10M107/44C10M2217/0443C10N2030/08C10N2050/02
Inventor 示野胜也家根武久服部贵洋谷川雅人
Owner TOYOBO CO LTD
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