Anti-yellowing salt-fog-resistant polyamide-imide resin composition as well as preparation method and application thereof

A polyamide-imide resin, polyamide-imide technology, applied in coatings, anti-corrosion coatings, etc., can solve the problem of reducing the service life of polyamide-imide resin, yellowing, and damage to polyamide-imide resin products and other problems, to achieve the effect of enhancing comprehensive mechanical properties, high salt spray resistance, and improving service time

Inactive Publication Date: 2021-12-10
南通博联材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, chloride ions have strong corrosion activity, resulting in strong corrosion and damage to protective coatings and polymer materials.
[0004] During the use of polyamide-imide resin, it is easy to be corroded by salt spray in the environment, causing damage to the polyamide-imide resin product. At the same time, after a period of use of polyamide-imide resin, yellowing will occur Phenomenon, resulting in unsightly appearance and differences, reducing the service life of polyamideimide resin

Method used

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  • Anti-yellowing salt-fog-resistant polyamide-imide resin composition as well as preparation method and application thereof
  • Anti-yellowing salt-fog-resistant polyamide-imide resin composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Waterborne Polyamideimide Resin

[0031] Put 785.5g of trimellitic anhydride, 1027.9g of diphenylmethane-4,4'-diisocyanate, and 2216.4g of N-methylpyrrolidone into the stirring reactor, and slowly raise the temperature for 1 hour while stirring in a dry nitrogen flow, and the to 120°C. 140 degreeC was maintained, and heating was continued for 3 hours in this state. Subsequently, the temperature was lowered to 85° C., a mixed solution of 576.1 g of dimethylethanolamine and 1942.5 g of pure water was added, and kept for 2 hours to obtain a water-based polyamide-imide resin, which was designated as A1.

[0032] Modified polyamideimide resin

[0033] 1,000 g of the obtained aqueous polyamide-imide resin solution (A1) was charged into a stirring reactor, and the temperature was gradually raised to 80° C. while stirring in a dry nitrogen flow. After reaching 80°C, slowly add 10.0g NH while stirring at 80°C 2 -C 4 h 8 CO-Mo-COC 6 h 12 -NH 2 (MW=2600), t...

Embodiment 2

[0035] 1000 g of the aqueous polyamide-imide resin solution (A1) obtained in Example 1 was charged into a stirring reactor, and the temperature was gradually raised to 80° C. while stirring in a dry nitrogen flow. After reaching 80°C, slowly add 75.0g NH while stirring at 80°C 2 -(C 3 h 6 ) X -(C 2 h 4 ) Y -NH 2 (MW=3000), the dropping time was 7 minutes and 30 seconds, and the aqueous polyamide-imide resin composition A12 was obtained after 60 minutes of heat preservation.

Embodiment 3

[0037] 1000 g of the aqueous polyamide-imide resin solution (A1) obtained in Example 1 was charged into a stirring reactor, and the temperature was gradually raised to 80° C. while stirring in a dry nitrogen flow. After reaching 80°C, keep stirring at 80°C and slowly add 5.0g NH 2 -C 4 h 8 CO-Mo-COC 6 h 12 -NH 2 (MW=2600) and 75.0gNH 2 -(C 3 h 6 ) X -(C 2 h4 ) Y -NH 2 (MW=3000) mixed solution, the dropwise addition time was 8 minutes, and the water-based polyamide-imide resin composition A13 was obtained after 60 minutes of heat preservation.

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Abstract

The invention relates to the technical field of resin modification, in particular to an anti-yellowing salt-fog-resistant polyamide-imide resin composition as well as a preparation method and application thereof. BOCAT-A and BOCAT-B are added into polyamide-imide resin to modify the polyamide-imide resin; the mass percentages of the added BOCAT-A, the added BOCAT-B and the added polyamide-imide resin are 5.0-20.0% and 2.0-8.0% respectively, the amide-imide resin modified by the BOCAT-A and the BOCAT-B has advantages of strong yellowing resistance and high salt spray resistance, and the polyamide-imide resin is modified by the BOCAT-A and the BOCAT-B so as to enhance the comprehensive performance of the polyamide-imide resin.

Description

technical field [0001] The invention relates to the technical field of resin modification, in particular to an anti-yellowing salt spray-resistant polyamide-imide resin composition, a preparation method and an application thereof. Background technique [0002] Polyamide-imide resin is a polymer in which imide rings and amide bonds are regularly arranged alternately. It is a high-temperature-resistant thermoplastic resin with good dimensional stability, excellent heat resistance and radiation resistance. , Good mechanical properties, excellent heat resistance, chemical resistance and solvent resistance, so it is widely used as a coating agent for various substrates. [0003] Chlorides in salt spray, such as sodium chloride and magnesium chloride, have the ability to quickly absorb moisture under very low humidity conditions. Moreover, chloride ions have strong corrosion activity, resulting in strong corrosion and damage to protective coatings and polymer materials. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/14C09D179/08C09D5/08
CPCC08G73/14C09D179/08C09D5/08
Inventor 吴峥
Owner 南通博联材料科技有限公司
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