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Special coating for food cans and preparation method thereof

A coating and canning technology, which is applied in the field of can packaging can coating and its preparation, can solve the problems of health hazards, high temperature resistance can not meet food hygiene, quality and safety, and achieve strong anti-corrosion and anti-rust performance, good anti-corrosion Acid anti-vulcanization performance, the effect of simple storage method

Active Publication Date: 2016-04-06
蚌埠飞浦科技包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing can inner packaging coatings contain high benzene content, which causes great harm to human health. At the same time, the anti-corrosion and anti-rust performance, acid and vulcanization resistance and high temperature resistance of can inner packaging coatings cannot be achieved. Meet the requirements of food hygiene quality and safety

Method used

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Examples

Experimental program
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preparation example Construction

[0020] A special coating for food cans and a preparation method thereof, mainly comprising the following steps:

[0021] ①Put the solvent in the container and add epoxy resin into the container, stir to dissolve, and obtain the solution mixture;

[0022] ② Filter and purify the solution mixture in ① to obtain a solution of granular impurities;

[0023] ③Add phenolic resin, low-molecular epoxy resin, and amino group to the solution in ②, stir and dissolve to obtain a mixed solution, and lower the temperature to 50°C.

[0024] ④ Filter the mixed solution obtained in ③ to obtain a solution free of granular impurities,

[0025] ⑤Add curing agent and surface accelerator to the solution obtained in ④, ensure that the solution is stirred enough for half an hour, and cool down to 40°C to obtain the coating;

[0026] ⑥ The paint obtained in ⑤ is inspected to obtain the finished paint.

specific Embodiment 1

[0027] Get solvent 62kg and place in reactor 1#, add epoxy resin 20kg in reactor 1#, carry out stirring heating and dissolving, obtain mixing easily, mixed solution is filtered and obtains the solution without impurity and is placed in reactor 2#, Add 10kg of phenolic resin, 4kg of low-molecular epoxy resin and 2kg of amino resin to reactor 2#, carry out stirring reaction and dissolve and then filter, put the solution in reactor 3#, add 1kg of curing agent to reactor 3# and surface accelerator 1kg, in the reaction kettle 3#, heat-preserved at 150°C for 90 minutes, then cooled the reaction kettle to 40°C to obtain a coating, and tested the coating to obtain a qualified finished coating for food cans.

specific Embodiment 2

[0028] Get solvent 59kg and place in reactor 1#, add epoxy resin 20kg in reactor 1#, carry out stirring heating and dissolving, obtain mixed solution, filter mixed solution to obtain impurity-free solution and place in reactor 2#, Add 10kg of phenolic resin, 4kg of low-molecular epoxy resin and 3kg of amino resin to reactor 2#, carry out stirring reaction and dissolve and then filter, put the solution in reactor 3#, add 2kg of curing agent to reactor 3# and surface accelerator 2kg, in the reaction kettle 3#, carry out heat preservation at 150°C for 90 minutes, then cool down the reaction kettle to 40°C to obtain a coating, and test the coating to obtain a qualified finished coating for food cans.

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PUM

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Abstract

The invention belongs to and relates to the technical field of can processing, and particularly relates to in-can paint for a can pack and preparation thereof. The special paint for a food can comprises the following components in percentage by mass: 30-70% of resin, 2-3% of amino, 0.5-2% of curing agent, 0.5-2% of surface accelerator and 56-67% of solvent. The special paint for a food can only contains an extremely small amount of benzene, and has no toxic action on human bodies. The paint provided by the invention has very high corrosion resistance and rust resistance, favorable acid resistance and sulfidation resistance, and high resistance to elevated temperatures. The paint provided by the invention is simple and quick in storage method and high in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of can processing, and more specifically relates to a can packaging can interior coating and its preparation. technical background [0002] Most of the existing can inner packaging coatings contain high benzene content, which causes great harm to human health. At the same time, the anti-corrosion and anti-rust performance, acid and vulcanization resistance and high temperature resistance of can inner packaging coatings cannot be achieved. Meet the requirements of food hygiene quality and safety. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a special coating for food cans with anti-corrosion, anti-acid, anti-sulfur, non-toxic substances and a method for processing and preparing the same. [0004] In order to solve the above technical problems, the present invention provides a special coating for food cans, which includes the following componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D161/06C09D161/20C09D5/08
Inventor 叶平赵小弟
Owner 蚌埠飞浦科技包装材料有限公司
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