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Curing agent and synthesis process of modified epoxy primer of mixed amine system by using benzyl benzoate leftovers

A technology of benzyl benzoate and leftovers, which is applied in the direction of epoxy resin coatings and coatings, can solve the problems of increasing benefits and difficult treatment of benzyl benzoate, and achieve the effects of increasing benefits, preventing environmental pollution, and low cost

Active Publication Date: 2018-02-06
HUBEI GREENHOME MATERIALS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of solidifying agent and synthesis process thereof utilizing benzyl benzoate leftovers to modify the epoxy primer of the mixed amine system, to solve the problem that benzyl benzoate is difficult to handle, turn waste into treasure, and prevent environmental pollution. pollution, increase efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Synthesis of 1:1 benzyl benzoate leftover curing agent for mixed amine system (synthesis of curing agent with a mixing mass ratio of epoxy primer (epoxy resin) and curing agent of 1:1):

[0021] Step 1: Preparation of epoxy resin solution: Add 10 parts ("part" is the weight ratio unit, which means any unit weight. For example, each part = 100 grams, 1 kilogram or 100 kilograms, etc., the same below) cashew nuts in the dissolution kettle Phenol and 1 part of epoxy resin 128 are heated and stirred, and the temperature is controlled at 50-70 ° C. After the epoxy resin 128 is dissolved, stop stirring and let stand to obtain the epoxy resin solution, which is set aside;

[0022] Step 2: Put 20 parts of mixed amine A1000 into the reaction kettle, heat up to 50°C, start adding epoxy resin solution to the reaction kettle, and control the temperature at 50-70°C;

[0023] Step 3: After the epoxy resin solution is added dropwise, keep it warm for 2 hours, and control the temperatu...

Embodiment 2

[0031] Synthesis of 1:1 benzyl benzoate leftover curing agent for mixed amine system (synthesis of curing agent with a mixing mass ratio of epoxy primer (epoxy resin) and curing agent of 1:1):

[0032] Step 1: Preparation of epoxy resin solution: Add 15 parts of cardanol and 2 parts of epoxy resin 128 into the dissolution kettle, heat and stir, and control the temperature at 50-70°C. After the epoxy resin 128 is dissolved, stop stirring , stand still, to obtain the epoxy resin solution, and set aside;

[0033] Step 2: Put 25 parts of mixed amine A1000 into the reactor, heat up to 50°C, start adding epoxy resin solution to the reactor, and control the temperature at 50-70°C;

[0034] Step 3: After the epoxy resin solution is added dropwise, keep it warm for 2 hours, and control the temperature at 50-70°C;

[0035] Step 4: After the reaction is over, turn on the vacuum of the reactor and keep it at 50-70°C for 30 minutes;

[0036] Step 5: Transfer the reaction materials to the...

Embodiment 3

[0041] Synthesis of 1:1 benzyl benzoate leftover curing agent for mixed amine system (synthesis of curing agent with a mixing mass ratio of epoxy primer (epoxy resin) and curing agent of 1:1):

[0042] Step 1: Preparation of epoxy resin solution: Add 12 parts of cardanol and 3 parts of epoxy resin 128 into the dissolution kettle, heat and stir, and control the temperature at 50-70°C. After the epoxy resin 128 is dissolved, stop stirring , stand still, to obtain the epoxy resin solution, and set aside;

[0043] Step 2: Put 28 parts of mixed amine A1000 into the reactor, heat up to 50°C, start adding epoxy resin solution to the reactor, and control the temperature at 50-70°C;

[0044] Step 3: After the epoxy resin solution is added dropwise, keep it warm for 2 hours, and control the temperature at 50-70°C;

[0045] Step 4: After the reaction is over, turn on the vacuum of the reactor and keep it at 50-70°C for 30 minutes;

[0046] Step 5: Transfer the reaction materials to the...

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Abstract

A curing agent for modifying the epoxy primer of the mixed amine system by using benzyl benzoate leftovers, which is mainly synthesized from the following chemical components in the weight ratio: 20-40 parts of mixed amines, 40-70 parts of benzyl benzoate leftovers 10-15 parts of cardanol, 1-10 parts of epoxy resin 128. The raw material of the invention is easy to obtain, the process is simple, the cost is low, and the obtained curing agent has excellent performance. Epoxy resin 128 can modify mixed amines, reduce free amines, and prevent oil surface. The curing agent prepared by the present invention has excellent performance, and its performance in all aspects reaches the national standard. There is no precipitation for more than 6 months. After curing, the surface is smooth and smooth, and there is no oil surface. Can reach more than 80.

Description

technical field [0001] The invention relates to a curing agent for modifying an epoxy primer of a mixed amine system by using benzyl benzoate leftovers and a synthesis process thereof. The prepared epoxy primer curing agent has excellent performance, and at the same time turns waste into treasure, which not only prevents environmental pollution, but also increases benefits. Background technique [0002] Benzyl benzoate leftovers are high boiling benzyl benzoate produced during the production process, and its composition is complex, generally including about 35% benzyl benzoate, 20% to 30% fluorenone, and about 1% benzoic acid and other impurities. The appearance is black, the viscosity is very high or even solid at room temperature, and the viscosity decreases when heated. According to incomplete statistics, there are nearly 3,000 tons of benzyl benzoate leftovers in the country, and the on-site piles are like mountains, which not only occupy the site but also pollute the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C08G59/56C09D163/00
CPCC08G59/56C08G59/62C09D163/00
Inventor 胡登华
Owner HUBEI GREENHOME MATERIALS TECH INC
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