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Multifunctional water-soluble chalk and manufacture method thereof

A water-soluble, multi-functional technology, applied in pencil lead, household utensils, applications, etc., can solve the problems of not forming products, etc., and achieve the effect of maintaining cleanliness, strong weather resistance, and maintaining writing stability

Active Publication Date: 2010-11-17
成都松齐明科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In response to this situation, quite a few technologies are moving towards the production of 100% dust-free chalk, but due to the reasons of raw materials, technology and craftsmanship, no truly feasible products have been formed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: process according to the following steps:

[0024] 1. Weigh 30kg of paraffin wax, 8kg of amphoteric surfactant, 5kg of polyether nonionic surfactant, 5kg of emulsifier, 10kg of polyethylene glycol, 0.3kg of erucamide, and 0.5kg of polyvinylpyrrolidone. The above raw materials are defined as A component;

[0025] 2. Put component A into a water bath constant temperature stainless steel container for melting, and keep the temperature constant at 70-90 degrees Celsius, preferably 80 degrees Celsius;

[0026] 3. After all the substances are melted, use a disperser to disperse and stir, adjust the speed of the disperser to 3000-3500 rpm, preferably 3000 rpm, and emulsify for 25 to 35 minutes, preferably 30 minutes;

[0027] 4. After emulsification, put in 1.5-2 times of the total mass of component A of titanium dioxide, preferably 1.8 times, and stir at a medium speed for 25-35 minutes until the material is uniform and free of bubbles, and it is best to stir f...

Embodiment 2

[0032] Compared with embodiment 1, step 4 is different, all the other steps are the same as embodiment 1, set forth the 4th step below:

[0033] 4. After emulsifying for 30 minutes, put 1.8 times the total mass of component A into titanium dioxide, and then add an appropriate amount of color pigments. The color materials can be any of red, yellow, green, etc., depending on the actual situation, medium speed Stir for 30 minutes to a uniform material without air bubbles, so that chalk slurry is made;

[0034] Compared with Example 1, the water-soluble chalk processed with the ingredients of the above-mentioned mass ratio has increased the selectability of the chalk color, and all the other effects are the same as in Example 1.

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PUM

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Abstract

The invention discloses multifunctional water-soluble chalk which comprises water-soluble base stock and dyestuff, wherein the water-soluble base stock comprises the following components in parts by weight: 20-40 parts of paraffins, 5-10 parts of amphoterics, 0.1-0.5 part of polyethers non-ionic surface active agent, 1-10 parts of emulsifier, 5-15 parts of polyethylene glycol, 0.1-0.5 part of erucamide and 0.1-0.6 part of polyvinylpyrrolidone, wherein the dyestuff comprises titanium white. The manufactured chalk has excellent removal property. The invention also has stronger weather fastness,better writing handle feeling of products, simple process, no generation of wastewater and waste materials, environment protection and cleanness and ensures the comfort of writing.

Description

technical field [0001] The invention relates to a teaching article, in particular to a chalk. Background technique [0002] At present, schools are using traditional dust-free chalk for teaching. Studies have shown that using traditional chalk, within a 3m diameter space of the podium, the working environment is very similar to the severity of dust hazards suffered by workers in front of steelmaking furnaces. [0003] The main components of traditional chalk are calcium carbonate (limestone) and calcium sulfate (gypsum), calcium oxide, and other small amounts of metals and heavy metal elements such as lead, manganese, barium, cadmium, etc. However, oil or polyalcohol is added to the original chalk as a binder, and then a raw material with a larger specific gravity is added to increase the specific gravity and volume of the chalk, making it difficult to scatter, but the effect is not obvious in practical applications. During the whole teaching process, a large amount of dust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 李克盛
Owner 成都松齐明科技有限公司
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