Cashew nut shell oil-modified mixed-amine curing agent and preparation method

A cashew nut shell oil and curing agent technology, applied in the chemical field, can solve the problems of unsatisfactory mechanical properties, unstable color, low price-quality ratio, etc., and achieve the effects of cost and efficiency balance, stable color and good gloss.

Inactive Publication Date: 2013-06-12
上海美东生物材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of cashew nut shell oil modified mixed amine curing agent, described this cashew nut shell oil modified mixed amine curing agent should solve the epoxy resin products that adopt modified amine as curing agent in the prior art The gloss is not ideal, the color is unstable, the construction is greatly affected by humidity, the mechanical properties are not ideal, and the price-quality ratio is not high.

Method used

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  • Cashew nut shell oil-modified mixed-amine curing agent and preparation method
  • Cashew nut shell oil-modified mixed-amine curing agent and preparation method
  • Cashew nut shell oil-modified mixed-amine curing agent and preparation method

Examples

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Embodiment 1

[0021] Heat 100 grams of mixed amine to 90 degrees, add 30 grams of polyoxymethylene in batches to be completely dissolved, reflux for 30 minutes, then add 300 grams of cardanol, keep the temperature at 90 degrees and react for 3 hours, then dehydrate and discharge. The obtained product has a viscosity of 3200, an amine value of 270.48, a volatile content of 1.60%, a solid content of 97.40%, a gel time of 100:88, 37 minutes; dry film 55 microns, impact 50 cm, bending grade 1, adhesion grade 1, surface hardness HB ; Appearance is smooth, high gloss, no defects.

Embodiment 2

[0023] Heat 100 grams of mixed amine to 90 degrees, add 30 grams of polyoxymethylene in batches to be completely dissolved, reflux for 30 minutes, then add 300 grams of cardanol, keep the temperature at 90 degrees and react for 3 hours, then dehydrate and discharge. The obtained product has a viscosity of 3000, an amine value of 269.50, a volatile content of 1.20%, a solid content of 98.2%, a gel time of 100:88, 41 minutes; dry film 50 microns, impact 50 cm, bending grade 1, adhesion grade 1, surface hardness HB ; Appearance is smooth, high gloss, no defects.

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Abstract

The invention discloses a cashew nut shell oil-modified mixed-amine curing agent and a preparation method. The preparation method comprises the following steps that mixed amine, paraformaldehyde and cardanol are respectively weighed according to a mole ratio of (0.6-1.5): (0.6-1.5): (0.8-1.2); and the mixed amine and the paraformaldehyde undergo an aldol condensation reaction, and after a part of hydroxyl groups of alcohol amine in the mixed amine are reacted, cardanol is added into the reaction system and undergoes a Mannich reaction to produce the cashew nut shell oil-modified mixed-amine curing agent. The purified cardanol undergoes a Mannich reaction and the reaction products are added with paraformaldehyde and mixed amine for modification so that the novel cashew nut shell oil-modified mixed-amine curing agent having low toxicity and fast curing rate is obtained.

Description

Technical field: [0001] The invention relates to the field of chemistry, in particular to organic chemistry, in particular to a curing agent, in particular to a cashew nut shell oil modified mixed amine curing agent and a preparation method thereof. Background technique: [0002] Curing agent is an important raw material for the production of epoxy resin products. In order to reduce the toxicity and environmental pollution of the curing agent during production and use, and at the same time reduce the environmental pollution of waste epoxy resin products, non-toxic or low-toxic modified amines are widely used in the prior art to replace primary polyene polyamines, Aromatic amines are used as curing agents for the production of epoxy resin products. However, epoxy resin products using modified amine as curing agent have unsatisfactory gloss, unstable color, great influence of moisture during construction, unsatisfactory mechanical properties, and low price-quality ratio. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C07C215/50C07C213/02C07D295/13
Inventor 黎明
Owner 上海美东生物材料股份有限公司
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