Special paint for food can 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 high temperature resistance that cannot meet the requirements of food hygiene, quality and safety, and health hazards, and achieve good acid and vulcanization resistance and strong corrosion resistance With antirust performance, the effect that storage method is simple
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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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