Cashew pnenolic aldehyde amine epoxide resin paint solidifying agent and method for producing the same

A technology of epoxy resin coating and cardanol phenolic amine, which is applied in the field of cardanol phenolic amine curing agent, and can solve the problems of difficult curing and non-curing.

Inactive Publication Date: 2009-08-19
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the fact that the curing agent modified with cardanol has good low-temperature curing performance, fast curing speed, and can still be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] On a 500ml reaction bottle, equipped with agitator, condenser, water separator and thermometer, add 150 grams of cardanol and 30 grams of ethylenediamine from the feeding port, stir evenly, add 15 grams of paraformaldehyde in batches, and control the temperature at Below 60°C, the addition time is 0.5 hours, add 2 grams of 2,4,6-tris(dimethylaminomethyl)phenol, then raise the temperature to 70-80°C, keep it warm for 4 hours, and then carry out vacuum (vacuum degree above 740mmHg) dehydration, The maximum temperature does not exceed 90°C, dehydrate until no water evaporates. The product is a light yellow viscous liquid with a solid content of 96%, an amine value of 300mgKOH / g, a number of active hydrogens of 3, a viscosity of 7000mPa·s, and a purity of 99%.

Embodiment 2

[0028] The device is the same as in Example 1, add 150 grams of cardanol and 41.2 grams of diethylenetriamine, stir evenly, add 32.8 grams of 37% by weight formaldehyde solution in batches, control the temperature below 60 ° C, add time for 0.5 hours, add 2, 4, After 2.5 grams of 6-tris(dimethylaminomethyl)phenol, heat up to 70-80°C, keep it warm for 3 hours, then carry out vacuum dehydration (vacuum degree above 740mmHg), dehydration temperature is 70-80°C, dehydrate until anhydrous and evaporate until. The product is a dark yellow viscous liquid with a solid content of 96%, an amine value of 380mgKOH / g, a number of active hydrogens of 3, a viscosity of 5000mPa·s, and a purity of 99.5%.

Embodiment 3

[0030] The device is the same as in Example 1, add 150 grams of cardanol and 47.6 grams of m-xylylenediamine, stir evenly, add 28.7 grams of 37% by weight formaldehyde solution in batches, control the temperature below 60 ° C, add time for 0.5 hours, add 2,4 , after 2.8 grams of 6-tris(dimethylaminomethyl)phenol, heat up to 70-80°C, keep it warm for 3 hours, and then carry out vacuum dehydration. until. The product is a yellow viscous liquid with a solid content of 97.7%, an amine value of 250mgKOH / g, a number of active hydrogen of 3, a viscosity of 10000mPa·s, and a purity of 99.2%.

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PUM

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Abstract

The invention relates to a curing agent used for epoxy resin coating and a preparation method thereof. The curing agent has the main component of cardanol-aldehyde amine, and is characterized in that the synthetic formulation of the cardanol-aldehyde amine comprises the following components based on the weight percentage: 60-70% of cardanol, 20-30% of polyamine, 10-20% of formaldehyde or paraformal-dehyde and 1-5% of 2, 4, 6ternary (dimethylamino methyl) phenol. Compared with common phenolic aldehyde amine curing agent, the curing agent has better water resisting property and flexility when being used for the epoxy resin coating, and generally does not affect the color mixing of finishing coat.

Description

technical field [0001] The invention relates to the synthetic resin and paint industry in the field of chemical industry, in particular to a compounding agent for paint based on epoxy resin, that is, a cashew phenalkamine curing agent. Background technique [0002] Epoxy resin is a widely used synthetic resin, especially in coatings, adhesives and other fields. In order to obtain performance with practical value, epoxy resin needs to use curing agent to make it cross-linked and cured. At this time, epoxy resin has excellent adhesion, mechanical properties, electrical properties and chemical corrosion resistance. The curing agent plays an important role in the performance of the cured epoxy resin. [0003] Polyamide curing agents are widely used in my country at this stage, but they have the disadvantages of being difficult to cure at low temperature, poor flexibility, impact resistance and other mechanical properties of the cured resin. [0004] There is also an epoxy resi...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D163/00
Inventor 於宁李肇强宋玮荣赵峰杨益平马程骏岳雅芳
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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