Preparation method of odor-free correction liquid

A correction fluid, odorless technology, applied in the direction of coating, etc., can solve the problems of toxic chemicals, free in the air, odorless, etc., and achieve the effect of simple preparation method, good rewritability, and good covering property

Inactive Publication Date: 2016-12-21
郭迎庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide an odorless correction fluid for the problem that the existing correction fluid has toxic chemical substances, which are volatile and free in the air, and will cause harm to the human body after being inhaled by the human body. The preparation method of liquid, in this method, potato starch and deionized water are treated with microwaves, then ammonium persulfate is added to heat, the pH of the mixed liquid is adjusted, and then dicyandiamide is added to adjust the pH again to obtain a cross-linked modified oxidized starch adhesive, and then The powder made of zinc oxide is stirred and ball milled with deionized water, sodium dodecylbenzenesulfonate, and titanium dioxide, and the white slurry obtained is mixed with polyacrylate emulsion and the above-mentioned adhesives, etc., and can be obtained by ball milling. Odorless correction fluid is obtained. The preparation method of the present invention is simple and convenient. The raw materials are non-toxic materials, water is used as the main solvent, and the covering property is good. The prepared correction fluid is odorless. Long-term use will not produce any toxic and side effects on the human body, and has a broad market prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 20g of potato starch and 100mL of deionized water into a beaker, and use a 500W microwave oven to microwave for 180s, then add 0.3g of ammonium persulfate to the beaker to prepare a mixed solution, heat the mixed solution to 55°C, keep the temperature for 50min, and use The mass fraction is 5% sodium hydroxide solution to adjust the pH of the mixed solution to 8.0, then add 0.6g dicyandiamide to the beaker, let it stand for 3h, continue to heat to 90°C, keep the temperature for 30min, and use a mass fraction of 5% sodium hydroxide Adjust the pH of the mixed solution to 8.0, cool to room temperature to obtain a cross-linked modified starch oxidized adhesive, and set aside; then weigh 4g of zinc oxide, add it to a pulverizer, and pass it through a 300-mesh sieve. Add the powder and 20mL deionized water to the Erlenmeyer flask, stir at 300r / min for 20min, add 0.2g sodium dodecylbenzenesulfonate and 4g titanium dioxide to the Erlenmeyer flask, continue stirring ...

example 2

[0020] First weigh 25g of potato starch and 130mL of deionized water into a beaker, and microwave it in a 500W microwave oven for 190s, then add 0.35g of ammonium persulfate into the beaker to prepare a mixed solution, heat the mixed solution to 58°C, keep the temperature for 55min, and use The mass fraction is 5% sodium hydroxide solution to adjust the pH of the mixture to 8.5, then add 0.8g of dicyandiamide to the beaker, let it stand for 3.5 hours, continue to heat to 93°C, keep the temperature for 35min, and oxidize it with a mass fraction of 5% hydroxide Adjust the pH of the mixed solution to 8.5 with sodium solution, cool to room temperature to obtain a cross-linked modified oxidized starch adhesive, and set aside; then weigh 4.5g of zinc oxide, add it to a pulverizer, and pass it through a 300-mesh sieve. Add zinc oxide powder and 25mL deionized water to the Erlenmeyer flask, stir at 350r / min for 25min, add 0.25g sodium dodecylbenzenesulfonate and 4.5g titanium dioxide t...

example 3

[0023]First weigh 30g of potato starch and 160mL of deionized water into a beaker, and microwave it in a 500W microwave oven for 200s, then add 0.4g of ammonium persulfate into the beaker to prepare a mixed solution, heat the mixed solution to 60°C, keep the temperature for 60min, and use The mass fraction is 5% sodium hydroxide solution to adjust the pH of the mixed solution to 9.0, then add 0.9g dicyandiamide to the beaker, let it stand for 4h, continue to heat to 95°C, keep the temperature for 40min, and use a mass fraction of 5% sodium hydroxide Adjust the pH of the mixed solution to 9.0, cool to room temperature to obtain a cross-linked modified starch oxidized adhesive, and set aside; then weigh 5g of zinc oxide, add it to a pulverizer, and grind it through a 300-mesh sieve. Add the powder and 30mL of deionized water to the Erlenmeyer flask, stir at 400r / min for 30min, add 0.3g of sodium dodecylbenzenesulfonate and 5g of titanium dioxide to the Erlenmeyer flask, continue ...

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PUM

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Abstract

The invention discloses a preparation method of odor-free correction liquid and belongs to the technical field of preparation of correction liquids. The method includes the steps of: performing microwave treatment to potato starch and deionized water and adding ammonium persulfate, heating the mixture liquid and regulating the pH of the mixture liquid, and adding dicyandiamide to regulate the pH again to prepare a crosslinked modified oxidized starch adhesive; and then stirring and ball-milling zinc powder in deionized water with sodium dodecyl benzene sulfonate and titanium dioxide to obtain white slurry, and uniformly stirring and mixing the white slurry, polyacrylate emulsion and the adhesion and ball-milling the mixture to prepare the odor-free correction liquid. The preparation method is simple and is prepared from toxic-free materials. Water serves as a main solvent so that the correction liquid is good in covering property and is odor-free. The correction liquid has no toxic and side effects on human body after long-time use, and has a wide market prospect.

Description

technical field [0001] The invention discloses a method for preparing an odorless correction fluid, which belongs to the technical field of correction fluid preparation. Background technique [0002] Correction fluid, also known as "correction fluid", "correction fluid" and "rewriting fluid", is a common stationery, white opaque pigment, painted on paper to cover typos, and can be rewritten on it after drying. Invented by American Betty Naismith Graham in 1951. The main components are three kinds of trichloroethane, methylcyclohexane, and cyclohexane, and the strength of their toxicity hazards is directly proportional to the concentration. [0003] Correction fluid is a white opaque pigment that is applied to paper to cover typos and then dries to rewrite over it. Correction fluid is traditionally packaged in a small bottle with a cap attached to a small broom or a triangular piece of Styrofoam dipped in the correction fluid. In recent years, a pen-shaped correction fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D10/00
CPCC09D10/00
Inventor 郭迎庆王龙薛蕾
Owner 郭迎庆
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