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Copying-proof film based on organic membrane structure and its preparation

A technology of anti-copying and copying film, which is applied in the printing, printing, sealing and other directions of producing special varieties of printed matter, to achieve the effect of low raw material cost, good application effect and good moisture resistance

Inactive Publication Date: 2011-07-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of such compounds is generally complicated, requiring multi-step organic synthesis reactions, and the raw materials are relatively expensive, so the cost of anti-copying materials is relatively high
In addition, although such compounds have been widely studied, no practical reports have been seen so far.

Method used

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  • Copying-proof film based on organic membrane structure and its preparation
  • Copying-proof film based on organic membrane structure and its preparation
  • Copying-proof film based on organic membrane structure and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of cadmium dithizone:

[0039] a) Dissolving the organic compound dithizone in tetrahydrofuran and refluxing for 7 minutes to completely dissolve the dithizone; the weight-to-volume ratio of dithizone to tetrahydrofuran solvent is 0.1 g: 10 mL;

[0040] b) dissolving cadmium nitrate in water to prepare a 0.15M aqueous solution;

[0041] c) The above two solutions were mixed and reacted for about 10min to make the reaction complete; the mol ratio of cadmium ions and dithizone was 1: 1;

[0042] d) adding about 25 volume multiples of water to the solution after the reaction in c), to precipitate the product;

[0043] e) After standing still for 48 hours, the product was filtered and dried.

[0044] Film formation:

[0045] a) adding an appropriate amount of plasticizer to a small amount of prepared dithizone metal salt light-absorbing substance, stirring to make it evenly mixed;

[0046] b) Add an appropriate amount of PVC powder, and finally add THF and s...

Embodiment 2

[0053] Preparation of zinc dithizone:

[0054] a) Dissolving the organic compound dithizone in tetrahydrofuran and refluxing for 10 minutes to completely dissolve dithizone; the weight-to-volume ratio of dithizone to tetrahydrofuran solvent is 0.2 g: 10 mL;

[0055] b) dissolving zinc nitrate in water to prepare a 0.12M aqueous solution;

[0056] c) The above two solutions were mixed and reacted for about 15 minutes to make the reaction complete; the molar ratio of metal ions to dithizone was 1.5:1;

[0057] d) adding about 30 volume multiples of water to the solution after the reaction in c), to precipitate the product;

[0058] e) After standing still for 48 hours, the product was filtered and dried.

[0059] Film formation:

[0060] a) adding an appropriate amount of plasticizer to a small amount of prepared dithizone metal salt light-absorbing substance, stirring to make it evenly mixed;

[0061] b) Add an appropriate amount of PVC powder, and finally add THF and stir ...

Embodiment 3

[0066] Preparation of lead dithizone:

[0067] a) Dissolving the organic compound dithizone in tetrahydrofuran and refluxing for 15 minutes to completely dissolve dithizone; the weight-to-volume ratio of dithizone to tetrahydrofuran solvent is 0.05g: 10mL;

[0068] b) Dissolving lead nitrate in water to prepare a 0.2M aqueous solution;

[0069] c) The above two solutions were mixed and reacted for about 12 minutes to make the reaction complete; the molar ratio of metal ions to dithizone was 2:1;

[0070] d) adding about 20 volume multiples of water to the solution after the reaction in c), to precipitate the product;

[0071] e) After standing still for 8 hours, the product was obtained by filtering and drying.

[0072] Film formation:

[0073] a) adding an appropriate amount of plasticizer to a small amount of prepared dithizone metal salt light-absorbing substance, stirring to make it evenly mixed;

[0074] b) Add an appropriate amount of PVC powder, and finally add THF ...

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Abstract

The invention relates to materials for an anti-copy film, in particular to the anti-copy film based on the structure of an organic film and preparation of the same. The anti-copy film uses dithizone metal salt as light-absorbing materials; compositions of the materials of the anti-copy film are the light-absorbing materials, plasticizing agents and PVC; and the mass ration of the light-absorbing materials, the plasticizing agents and the PVC is 1 to 20-600 to 10-120. The anti-copy film plays a part in preventing copy of a file covered by the film under the condition that the reading effect isnot affected. A method for preparing the anti-copy materials is simple, does not need complex synthetic procedures, affects the reading effect little, and is particularly suitable for the anti-copy requirements of general character files or general graph files.

Description

technical field [0001] The invention relates to an anti-copying film material, in particular to an anti-copying film based on an organic film structure and its preparation. Background technique [0002] With the rapid development of science and technology, copying technology is becoming more and more perfect, and the problem of anti-copying of confidential documents has become increasingly prominent. In view of its importance in the fields of national defense and public security, many countries have invested a lot of manpower and material resources in research. [0003] The research on anti-copying materials began in the 1970s. European and American developed countries and Japan have done a lot of research work in this area. Foreign countries have developed anti-copying technology research into a very important subject. In recent years, many researchers in China have engaged in similar research work, but the technology is not yet very mature. [0004] The principle of ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G21/04B41M3/14G09F3/02G03C5/08
Inventor 徐芬孙立贤刘玉胜张箭曹朝霞赵军宁张耀
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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