Cardanol modified phenolic amide curing agent and preparation method thereof

A technology of phenalkamide and cardanol, which is applied in the preparation of carboxylic acid amide, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of uncurable and limited usability, and achieve good adhesion, toughness and anti-corrosion performance. Good, long-term effect

Pending Publication Date: 2022-05-24
ZHEJIANG WANSHENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because it cannot be cured in low temperature environment, its use in winter is limited

Method used

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  • Cardanol modified phenolic amide curing agent and preparation method thereof
  • Cardanol modified phenolic amide curing agent and preparation method thereof
  • Cardanol modified phenolic amide curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of compound of formula (3)

[0025] Put 150g cardanol, 53.9g maleic anhydride into the reaction flask, add 0.75g catalyst cobalt isooctanoate and 9g pyrrolidone, carry out nitrogen replacement and be warmed up to 150-190 DEG C reaction, keep warm for 4-5hr, cool down, add xylene 90g, water 90g, stand for stratification, liquid separation, the organic layer is desolvated under reduced pressure at 100-120°C to obtain the compound represented by formula (3); analysis result: acid value is 230mgKOH / g, iodine value is 110g / 100g.

Embodiment 1a

[0026] Example 1a: Preparation of compound of formula (3)

[0027] Put 150g cardanol, 63.7g maleic anhydride in the reaction flask, add 1.0g catalyst cobalt naphthenate and solvent 10g pyrrolidone, carry out nitrogen replacement and be warmed up to 150-190 ℃ reaction, keep warm for 5-7hr, cool down, add ethyl acetate 100g, 100g water, stand for stratification, liquid separation, and desolventizing under reduced pressure at 100-120°C to obtain the compound shown in formula (3); analysis result: acid value is 236mgKOH / g, iodine value is 105g / 100g.

Embodiment 2

[0028] Example 2: Preparation of compound represented by formula (2)

[0029] 100g of compound shown in formula (3), 42.2g of diethylenetriamine (DETA) were put into the reaction flask, the temperature was raised to 150-160 DEG C for reaction, the temperature was kept for 4-5hr, and the temperature was lowered to obtain the compound of formula (2). Analysis result: amine The value was 510 mgKOH / g; the viscosity was 22000 cp@25°C.

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Abstract

The invention discloses a cardanol-modified phenolic amide curing agent and a preparation method thereof, the cardanol-modified phenolic amide curing agent takes high-purity cardanol as a raw material, the cardanol-modified phenolic amide curing agent is subjected to ene reaction with maleic anhydride, the obtained product is subjected to condensation reaction with fatty amine, the condensation product is subjected to mannich reaction with paraformaldehyde and fatty amine, and a target product is obtained. Or high-purity cardanol shown in the formula (4) is used as a raw material and is subjected to ene reaction with maleic anhydride, the obtained product is subjected to condensation reaction with fatty amine, the obtained product is subjected to mannich reaction with paraformaldehyde and MXDA, and the compound shown in the formula (5) is obtained; the product not only has the low-temperature curing performance of phenolic aldehyde amine, but also has the good adhesive force, toughness, corrosion resistance and good insulating performance of polyamide, and can be used in the fields of electronic encapsulating materials, anticorrosive coatings and the like.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin anti-corrosion coatings, and particularly relates to a cardanol-modified phenolic amide curing agent and a preparation method thereof. Background technique [0002] Cardanol is a natural phenolic substance with phenolic hydroxyl functional groups and unsaturated 15 C long-chain hydrocarbons. It can be used as a bio-based substitute for petrochemical raw materials and is widely used in coatings and adhesives. Abundant, renewable and inexpensive sources have become a research hotspot in recent years. [0003] Phenalkamines are phenols, aldehydes and polyamines as raw materials. They are synthesized by Mannich reaction. Because they contain phenolic hydroxyl groups, they have low-temperature curing properties and a long carbon chain of fifteen carbons, which can provide products with good toughness. Benzene ring structure, the product has high temperature resistance. However, there are also som...

Claims

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Application Information

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IPC IPC(8): C07C237/20C07C231/12C08G59/68C09D5/08C09D163/00
CPCC07C237/20C08G59/688C09D163/00C09D5/08Y02P20/584
Inventor 傅绍军李凤李旭锋伍双全颜伟军张越洋
Owner ZHEJIANG WANSHENG
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