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Epoxy prime coat curing agent prepared by modifying mixed amine system with benzyl benzoate leftovers and synthesis technique thereof

A technology of benzyl benzoate and curing agent, used in epoxy resin coatings, coatings and other directions, can solve the problems of difficult treatment of benzyl benzoate and increase benefits, and achieve the effects of preventing environmental pollution, increasing benefits and excellent performance.

Active Publication Date: 2016-10-26
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 use benzyl benzoate leftovers to modify mixed amine system epoxy primer curing agent and synthesis process thereof, to solve the problem that benzyl benzoate is difficult to handle, turn waste into wealth, prevent environmental 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 waste curing agent in 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 temperature a...

Embodiment 2

[0031] Synthesis of 1:1 benzyl benzoate waste curing agent in 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 dis...

Embodiment 3

[0041] Synthesis of 1:1 benzyl benzoate waste curing agent in 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 dis...

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Abstract

The invention relates to an epoxy prime coat curing agent prepared by modifying a mixed amine system with benzyl benzoate leftovers. The epoxy prime coat curing agent is mainly synthesized from the following chemical components in parts by weight: 20-40 parts of mixed amines, 40-70 parts of benzyl benzoate leftovers, 10-15 parts of cardanol and 1-10 parts of epoxy resin (128). The technique has the advantages of accessible raw materials, simple process and low cost; and the obtained curing agent has excellent properties. The epoxy resin 128 can be used for modifying the mixed amines, thereby reducing the free amines and preventing the oil surface. The curing agent provided by the invention has favorable properties, and various properties reach the Chinese standard. The curing agent does not precipitate after more than 6 months, and the cured surface is flat and smooth without any oil surface. The surface drying time is 4-6 hours, and the solid drying time is 12-24 hours. The Shore hardness can reach 80 or above.

Description

technical field [0001] The invention relates to a curing agent for an epoxy primer of a mixed amine system modified by benzyl benzoate waste 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 waste is the high boiling benzyl benzoate produced during the production process, and its composition is complex, generally including about 35% benzyl benzoate, 20% to 30% fluorenone, 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 waste in the country, and the site is piled up like a mountain, which not only occupies the site but also pollutes the environment. It i...

Claims

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Application Information

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