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Antibacterial coating for securities

A technology of coating and antibacterial agent, applied in the field of products containing the coating, can solve the problems of poor universality, high requirements on substrates, high cost of coating raw materials, and high use and maintenance costs, so as to achieve cost reduction and chemical resistance. and the effect of improved physical resistance and excellent mildew resistance

Active Publication Date: 2020-02-07
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the preparation of inorganic antibacterial agents (such as Ag-Zn inorganic antibacterial agents, rare earth salt antibacterial agents or rare earth oxide antibacterial agents) into coatings mainly has the following problems: poor universality and relatively low requirements for substrates. High, complex coating preparation, high cost of coating raw materials and use and maintenance process, poor anti-mildew effect applied to securities
At present, there is no literature report on the use of antibiotics as anti-mold materials

Method used

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  • Antibacterial coating for securities
  • Antibacterial coating for securities
  • Antibacterial coating for securities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The preparation of embodiment 1 coating composition

[0063] According to the following preparation process, coating composition 1 was prepared, and its composition is shown in Table 1.

[0064] (1) Tego Dispers 610S and 77 parts by weight polyether diol 1000-UA, 13 parts by weight propoxylated neopentyl glycol diacrylate, 5 parts by weight Daracur1173, 2 parts by weight Irgacure184, 1 part by weight polyethylene micropowder Wax and 2 parts by weight of ultrafine silicon dioxide were uniformly mixed to obtain a uniform composition A, wherein the concentration of Tego Dispers 610S was 0.5 ppm.

[0065] (2) The composition A is tested for fineness, the fineness plate is Elcometer brand, and the measuring range is 15 μm. No particles appear in composition A, which proves that the stirring is even and sufficient.

[0066] (3) Take one-tenth of composition A and add natamycin so that the content of natamycin in the mixture is 5 ppm. The process of high-speed stirring is u...

Embodiment 2

[0080] The preparation of embodiment 2 coating

[0081] Using a domestic coating machine, the coating composition 1 was coated on both sides of an ordinary banknote (sample 1) by printing. The coated banknotes are dried on-line by using an ultraviolet dryer, the light intensity of the lamp tube is greater than 120W, and the ultraviolet wavelength is 200-400nm.

[0082] Using a domestic coating machine, the coating composition 2 was coated on both sides of an ordinary banknote (sample 2) by printing. The coated banknotes are dried on-line by using an ultraviolet dryer, the light intensity of the lamp tube is greater than 120W, and the ultraviolet wavelength is 200-400nm.

[0083] In the above preparation process, the printing speed is 7000-7500 sheets / hour, and the dry weight of surface coating is 2.5-4g / m 2 (one-sided).

[0084] After coating, the hand feeling of the banknote sample is the same as that before coating, and the inspection of various printed patterns and anti-...

Embodiment 3

[0085] Test and Evaluation of Physical Resistance and Chemical Resistance of Example 3 Banknote Samples

[0086] According to JY / T4203-1998 "Standard Banknote Resistance Test Method for Financial Printing Industry of the People's Republic of China", the performance of samples 1 and 2 before and after coating was tested and evaluated from two aspects of physical resistance and chemical resistance.

[0087] Physical resistance tests include: pollution resistance, abrasion resistance, and wrinkle resistance tests;

[0088] Chemical resistance tests include: acid and alkali resistance, solvent resistance, and detergent resistance tests.

[0089] The specific results are shown in Table 4.

[0090] Physical resistance and chemical resistance test results of the samples in Table 4

[0091]

[0092] It can be seen from Table 4 that the coating of the present invention can improve the physical resistance and chemical resistance of banknotes to varying degrees.

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Abstract

The invention relates to an antibacterial coating for negotiable securities, in particular to a coating composition which comprises an antibacterial agent, a photopolymerizable prepolymer, a photopolymerization initiator, a photopolymerizable monomer and a dispersant, wherein the antibacterial agent is natamycin and / or nystatin. The invention further relates to a coating prepared from the coating composition, a method for preparing the coating composition and the coating, and a product containing the coating. The coating composition and the coating provided by the invention can impart antibacterial and mildew-proofing functions to the negotiable securities.

Description

technical field [0001] The invention relates to a coating composition, which contains an antibacterial agent, a photopolymerizable prepolymer, a photopolymerization initiator, a photopolymerizable monomer and a dispersant, and the antibacterial agent is natamycin and / or Nystatin. The invention also relates to coatings prepared from the coating compositions, methods of making the coating compositions and coatings, and articles containing the coatings. The coating composition and coating of the present invention can impart antibacterial and antifungal functions to valuable securities. Background technique [0002] The surface of valuable securities such as banknotes has an environment for the survival of microorganisms, which is conducive to the growth and reproduction of mold, which can easily lead to mildew and damage to valuable securities, which will damage their circulation performance and anti-counterfeiting performance. At present, securities that have been issued in ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D163/10C09D5/14C09D7/61C09D7/63C09D7/65D21H19/46D21H19/58D21H21/36
CPCC08L2205/03C09D5/14C09D163/10C09D175/14D21H19/46D21H19/58D21H21/36C08L23/06C08K3/36
Inventor 项洋孙承航周树荣王文兰吕建英李春芝王子酉李新宇唐士力高瑞
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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