Dust-free and environment-friendly chalk and preparation method thereof
A kind of technology for chalk and environmental protection, which is applied in the direction of pencil lead, household utensils, applications, etc. It can solve the problem that the reduction effect of chalk dust pollution is not very obvious, and achieve the effect of improving the teaching environment, fluent writing with chalk, and increasing the specific gravity and volume
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Embodiment 1
[0013] The content of the present invention is made by the following weight and number ratios,
[0014] 30 parts of titanium dioxide, 20 parts of calcium sulfate, 15 parts of stearic acid, 10 parts of soybean oil, 5 parts of paraffin, 1 part of talcum powder, and 1 part of red iron oxide.
[0015] The preparation method of the present invention is that the above-mentioned raw material components are mixed and then added to the reaction kettle, and stirred for 2 hours at a temperature of 330° C., then the raw materials in the reaction kettle are injected into the chalk forming mold, and after cooling the forming mold , cured to obtain the finished product.
Embodiment 2
[0017] The content of the present invention is made by the following weight and number ratios,
[0018] 40 parts of titanium dioxide, 15 parts of calcium sulfate, 25 parts of stearic acid, 5 parts of soybean oil, 10 parts of paraffin, and 5 parts of talcum powder.
[0019] The preparation method of the present invention is that the above-mentioned raw material components are mixed and added to the reaction kettle, and stirred for 1 hour at a temperature of 300 ° C, and then the raw materials in the reaction kettle are injected into the chalk forming mold, and after cooling the forming mold , cured to obtain the finished product.
Embodiment 3
[0021] The content of the present invention is made by the following weight and number ratios,
[0022] 35 parts of titanium dioxide, 18 parts of calcium sulfate, 20 parts of stearic acid, 8 parts of soybean oil, 8 parts of paraffin, 3 parts of talcum powder, and 1 part of tartrazine.
[0023] The preparation method of the present invention is that the above-mentioned raw material components are mixed and added to the reaction kettle, and stirred for 1.5 hours at a temperature of 320 ° C, and then the raw materials in the reaction kettle are injected into the chalk forming mold, and after cooling the forming mold , cured to obtain the finished product.
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