Preparation method of color-variable anti-counterfeiting low-toxicity inkpad

A color-changing, printing pad technology, applied in inks, household appliances, applications, etc., can solve problems such as easy contamination, dry surface, toxicity, etc., to improve water retention and absorption performance, broad application prospects, and improve thermal stability. Effect

Pending Publication Date: 2019-11-15
周建兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention is that traditional ink pads generally use cinnabar and red lead as red pigments, which have certain toxicity and do not have the function of discoloration and anti-counterfeiting. Basically, the ink pads sold in the market are easy to be contaminated after use, difficult to clean, and long-term. After time storage, the surface layer is easy to dry out, and it is not easy to seal the defects. It provides a preparation method of color-changing anti-counterfeiting and low-toxicity ink pad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of porous rubber powder:

[0033] 40g chitosan is dissolved in 100mL mass fraction and is 85% acetic acid solution, obtains chitosan solution, gets the agar powder of 10g and stirs and disperses in the beaker that 50mL mass fraction is housed with 20% sodium alginate solution, put Place the beaker in a water bath, heat up to 90°C, and heat to dissolve for 30 minutes to obtain an agar solution;

[0034] Blend the chitosan solution and the above agar solution at a volume ratio of 2:1, put them into a water bath heated to 70°C and stir for 30 minutes to obtain a reaction product, and mix the reaction product and methyl red at a mass ratio of 5: 1 Pour into a crystallization dish, freeze in a refrigerator with a set temperature of -5°C for 20 hours, take out the reaction product and thaw it, soak it in absolute ethanol for 7 hours, filter and take the filter residue and put it in a freeze dryer, at -30°C Freeze-dry for 1 hour to obtain porous rubber powder for ...

Embodiment 2

[0041] Preparation of porous rubber powder:

[0042] 45g chitosan is dissolved in 110mL mass fraction and is 85% acetic acid solution, obtains chitosan solution, gets the agar powder of 12g and stirs and disperses in the beaker that 55mL mass fraction is 20% sodium alginate solution is housed. Place the beaker in a water bath, heat up to 95°C, and heat to dissolve for 35 minutes to obtain an agar solution;

[0043] Blend the chitosan solution and the above agar solution at a volume ratio of 2:1, put them into a water bath heated to 75°C and stir for 35 minutes to obtain a reaction product, and mix the reaction product and methyl red at a mass ratio of 5: 1 Pour into a crystallization dish, freeze in a refrigerator with a set temperature of -2°C for 22 hours, take out the reaction product and thaw it, soak it in absolute ethanol for 7.5 hours, filter and take the filter residue into a freeze dryer, and freeze at -27°C Down freeze-drying 1.5h, obtain porous rubber powder, set a...

Embodiment 3

[0050] Preparation of porous rubber powder:

[0051] 50g chitosan was dissolved in 120mL mass fraction of 85% acetic acid solution to obtain chitosan solution, 15g of agar powder was stirred and dispersed in a beaker with 60mL mass fraction of 20% sodium alginate solution, and Place the beaker in a water bath, heat up to 100°C, and heat to dissolve for 40 minutes to obtain an agar solution;

[0052] Blend the chitosan solution and the above agar solution at a volume ratio of 2:1, put them into a water bath heated to 80°C and stir for 40 minutes to obtain a reaction product, and mix the reaction product and methyl red at a mass ratio of 5: 1 Pour into a crystallization dish, freeze in a refrigerator with a set temperature of 0°C for 24 hours, take out the reaction product and thaw it, soak it in absolute ethanol for 8 hours, filter the filter residue, put it in a freeze dryer, and freeze it at -25°C Dry for 2 hours to obtain porous rubber powder for subsequent use;

[0053] P...

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Abstract

The invention discloses a preparation method of color-variable anti-counterfeiting low-toxicity inkpad, and belongs to the technical field of chemical engineering. Carboxyl on molecular chains of bamboo charcoal viscose fibers provided by the invention and amino on chitosan can be subjected to high ionic cross-linking action; porous rubber powder is taken as a framework raw material of the inkpad,high hydrogen bond interaction between guar gum, cellulose, chitosan and agar is achieved, and the guar gum, the cellulose, the chitosan and the agar can all absorb water vapor in the air to form a reticular water-retaining structure of saturated hydrogel, so that the inkpad forms a uniform system, is not dried easily, and can be stored for a long time; methyl red is added as an anti-counterfeiting reversible pigment, and fills the gel inkpad through cocrystallization, and carbon-carbon bonds, carbon-oxygen bonds and carbon-hydrogen bonds in the inkpad are difficult to break through hydrogenbond action between hydroxyl of the chitosan and hydroxyl of the agar the cellulose and through action between amino and hydroxyl of the chitosan, so that dehydration of the inkpad is more difficult,and thermal stability of the inkpad is improved.

Description

technical field [0001] The invention discloses a preparation method of a color-changing, anti-counterfeit and low-toxic ink pad, which belongs to the technical field of chemical industry. Background technique [0002] Ink pad is an indispensable item in people's life and a medium for conveying art. As the best tool for seal expression, inkpad is mainly used in the creation of calligraphy and painting, collection of calligraphy and painting, stamping and stamping, etc. The quality of ink pad directly affects the effect expressed by seal art. A good ink pad is red but not hot, quiet and elegant, delicate and thick; engravings on calligraphy and painting are bright in color and have a three-dimensional effect. [0003] The main raw materials for making calligraphy and painting ink pads come from minerals, vegetable oils, plant fibers, and natural spices. They are carefully inspected, reasonably formulated, and made by hand-kneading. Commonly used are cinnabar, Zhu dart, eigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/037C09D11/14C09D11/03
CPCC09D11/03C09D11/037C09D11/14C09D11/50
Inventor 周建兵
Owner 周建兵
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