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Preparing method for writing liquid on blackboard

A writing fluid and blackboard technology, applied in ink, household utensils, applications, etc., can solve the problems of chalk polluting the environment and affecting people's health, and achieve the effect of avoiding trouble and easy to promote

Inactive Publication Date: 2009-06-10
潘国武
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a blackboard writing liquid without flying dust, non-toxic and odorless, which solves the problems of using chalk to pollute the environment and affect people's health, and its use cost is equivalent to that of chalk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the present invention is divided into two steps, one is to prepare PVA emulsifier; the other is to prepare emulsified solution.

[0020] 1. Prepare PVA emulsifier.

[0021] The preparation process is to gradually add PVA to pure water under constant stirring, and then use indirect heating to raise it from room temperature to 90 ° C and maintain this temperature to completely dissolve PVA in water. The dissolution time is 4 hours, and finally in the Cool down to room temperature under stirring to obtain PVA water emulsifier.

[0022] 2. Preparation of emulsified solution, that is, blackboard writing solution.

[0023] The preparation process is to fully mix a certain amount of pigment with a certain amount of surfactant, so that the pigment can be wetted and dispersed. In order to fully disperse, it is necessary to further use mechanical dispersion and shear force to make the pigment almost disperse in an ion state. Surfactant, then fully mixe...

Embodiment 1

[0026] Prepare white chalkboard writing fluid.

[0027] After adding 25000g of water into the electric heating enamel reaction kettle and starting the mixer and the electric heating switch, add 300g of PVA 17-88 and 500g of PVA 17-99 into the kettle. When the temperature of the reaction kettle solution reaches 80°C, turn off the electric heating switch to allow the PVA to dissolve completely for 4 hours. Allow it to cool naturally to room temperature under stirring to obtain the emulsion stabilizer of the present invention.

[0028] Weigh 8000g of titanium dioxide, then weigh 500g of glycerol, 1000g of propylene glycol, 800g of ethylene glycol, 1600g of polyethylene glycol, 1000g of dioctyl sebacate, 25g of polyoxyethylene castor oil, and 25g of polyoxyethylene nonylphenol ether 25g, 10g of acrylic acid monomer, and 6g of sodium hexametaphosphate were put into a blender and stirred evenly, and 100g of polyoxyethylene fatty alcohol ether and polyethylene glycol distearate were...

Embodiment 2

[0030] Prepare white chalkboard writing fluid.

[0031] After adding 25,000g of water into the electric heating enamel reaction kettle and starting the mixer and the electric heating switch, add PVA 17-88 400g and PVA 17-99 400g to the kettle, when the temperature gauge in the reaction kettle shows 80°C, turn off the electric heating switch to allow The PVA was completely dissolved under stirring for 4 hours and cooled to room temperature.

[0032] Weigh 9500g of titanium dioxide, and then mix it with Tween-80, Tween-20, Span-80, polyoxyethylene nonylphenol ether, polyoxyethylene castor oil, methyl ethyl ketone oxime, ethylene glycol butyl ether, propylene glycol, polyethylene glycol Alcohol, polyethylene glycol distearate, the addition amount is 100g, 100g, 100g, 100g, 150g, 100g, 150g, 5g, 1000g, 100g, 800g, 1000g, 1500g, 100g, mix well in the mixer Finally, grind it in a colloid mill for 3 to 5 times, then mix it with PVA emulsifier and disperse it in a sand mill for 3 to ...

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PUM

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Abstract

A writing liquid for black board is a stable suspension prepared from pigment, surfactant, and emulsifying stabilizer through mixing, grinding, dispersing and shearing. Its advantages are no poison and odor, clear tracing, easy erasing and low cost.

Description

Technical field: [0001] The invention relates to a writing ink, in particular to a preparation method of a dust-free, non-toxic and non-irritating blackboard writing liquid. Background technique: [0002] Chalk and blackboards (now developed into black and green boards) are important cultural and educational supplies. Because chalk has many disadvantages, as: produce flying dust to pollute the environment when writing and erasing, easily broken and discarded chalk tip, skin is encroached because of grasping and writing, inconvenient to carry etc. Therefore, there have been "dust-free chalk", "fine dust chalk", "magnetic chalk", etc. on the market, but their production technology, raw materials and writing methods have not completely broken away from the shackles of chalk and have not fundamentally overcome the disadvantages of chalk. . [0003] In recent years, some units and schools have replaced blackboards with whiteboards, and replaced chalk with whiteboard markers. Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/16
Inventor 潘国武
Owner 潘国武