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Cashew phenolic aldehyde amide epoxy hardener for four-season-general type anticorrosive paint and preparation method of cashew phenolic aldehyde amide epoxy hardener

A technology of epoxy curing agent and anti-corrosion coating, which is applied in the direction of anti-corrosion coating, carboxylic acid amide preparation, chemical instruments and methods, etc., to achieve the effects of fast drying speed, high purity, and strong low-temperature applicability

Active Publication Date: 2014-07-02
江苏三木化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: the technical problem to be solved by the present invention is to overcome the deficiencies of cashew alkamine and polyamide in the prior art, and provide a scientific and reasonable component ratio, fast drying, strong low-temperature applicability, low viscosity, and wide application range. Good flexibility and good yellowing resistance, good recoatability, long operating period, good anti-corrosion performance, excellent water resistance, cashew nut phenalkamide epoxy curing agent for all-season anti-corrosion coatings, another purpose of the present invention is to provide a production Short time, high work efficiency, high yield, and low-cost preparation method of cashew nut phenalkamide epoxy curing agent for general-purpose anticorrosion coatings in all seasons

Method used

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  • Cashew phenolic aldehyde amide epoxy hardener for four-season-general type anticorrosive paint and preparation method of cashew phenolic aldehyde amide epoxy hardener

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Embodiment 1

[0032] 1. A cashew nut phenolic amide epoxy curing agent for four-season general-purpose anticorrosion coatings, which is made of the following raw materials in parts by weight: 103g of diethylenetriamine, 280g of dimer acid or 18 carbon unsaturated fatty monoacids, cashew nuts 300g of phenol: 103g of diethylenetriamine, 94g of paraformaldehyde with a purity of 96%.

[0033] 2. The preparation method of the cashew nut phenolic amide epoxy curing agent for the above-mentioned four-season general-purpose anticorrosion coating specifically comprises the following steps:

[0034] (1) First put 103g of diethylenetriamine, 280g of dimer acid or 18-carbon unsaturated fatty monoacid into a 1000mL reactor, heat it to 140oC after stirring evenly, keep it for 2 hours, then heat it to 160oC for 1 hour, then Reheat to 180oC, keep warm for 2 hours, and cool down to 80oC after the water is completely discharged;

[0035] (2) Then put 300g of cardanol and 103g of diethylenetriamine into the ...

Embodiment 2

[0040] 1, a kind of cardanol phenalkamide epoxy curing agent for four seasons universal anticorrosion coating, it is made of the raw material of following parts by weight: diethylenetriamine 103g, unsaturated fatty acid 280g of 18 carbons, cardanol 300g, two Ethylenetriamine 103g, 37% formaldehyde aqueous solution 284g.

[0041] 2, the preparation method of cashew nut phenolic amide epoxy curing agent for the above-mentioned four-season general-purpose anticorrosion coating, it may further comprise the steps:

[0042] (1) First put 103g of diethylenetriamine and 280g of 18-carbon unsaturated fatty monoacid into a 2000mL reactor, stir well, heat to 140 oC, keep it for 2 hours, then heat it to 160oC for 1 hour, and then heat it to 180oC, keep warm for 2 hours, and cool down to 80oC after the water is completely discharged;

[0043] (2) Then put 300g of cardanol and 103g of diethylenetriamine into the reaction kettle of step (1), stir well, then slowly add 284g of 37% formaldehyde...

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Abstract

The invention discloses a cashew phenolic aldehyde amide epoxy hardener for four-season-general type anticorrosive paint and a preparation method of the cashew phenolic aldehyde amide epoxy hardener. The cashew phenolic aldehyde amide epoxy hardener is composed of, by weight, one part of diethylenetriamine, 2.5-3 parts of dimer acids or fat single acids, 2.8-3.2 parts of anacardol, one part of the diethylenetriamine, and 0.9-1.2 parts of 96%-purity paraformaldehyde. Raw material composition, and the best matching and the feeding order of each material are optimized through a large number of experiments, and each component matching is scientific and reasonable. The method of mannich addition after amidation is utilized, the whole process is strong in operability, cost is low, production periods are short, productivity is high, the prepared cashew phenolic aldehyde amide epoxy hardener can be general in four seasons, drying is rapid, operation periods are short, anti-corrosion performance is good, and water-proof performance is excellent. The cashew phenolic aldehyde amide epoxy hardener can be widely used in the fields of pipe and storage tank storage corrosion prevention, adhesion agents, metallic top coats, chip heavy corrosion prevention and the like.

Description

technical field [0001] The invention relates to an epoxy curing agent, in particular to a cashew nut phenolic amide epoxy curing agent for all-season anticorrosion coatings and a preparation method thereof. Background technique [0002] Cashew phenalkamine is prone to yellowing, which affects the appearance of the paint film when making light-colored topcoats. Compared with polyamides, there is still a certain gap in flexibility. The cured epoxy resin has a hard surface after drying and has a relatively high surface energy Low, poor recoatability, and poor miscibility with other amine curing agents, not easy to mix. Polyamide has excellent adhesion, flexibility and impact resistance, but has low hardness, is afraid of moisture, and has poor low-temperature curing performance. Therefore, it is necessary to develop and design a novel epoxy curing agent with the advantages of both cardan alkamine and polyamide on the basis of the prior art, and reduce the technical limitations...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C08G59/62C09D163/00C09D5/08C07C231/12C07C233/38
Inventor 樊丰文惠正权
Owner 江苏三木化工股份有限公司
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