Preparation method and product of stress-sensitive paper anti-fake coating

A paper and stress technology, which is applied in the field of preparation of alkenyl succinic anhydride (ASA) paper anti-counterfeiting emulsion, can solve the problems such as the large influence of anti-counterfeiting coatings, and achieve the effects of good humidity stability, reduced agglomeration, and simple steps

Active Publication Date: 2018-10-16
辽宁兴东科技有限公司
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  • Description
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Problems solved by technology

[0003] Aiming at the current problems that environmental humidity has a great influence on anti-counterfeiting coatings, the present invention provides a method for preparing a stress-sensitive alkenyl succinic anhydride (ASA) anti-counterfeiting coating, without adding other surfactants, and the obtained anti-counterfeiting coating is stable to humidity it is good

Method used

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  • Preparation method and product of stress-sensitive paper anti-fake coating
  • Preparation method and product of stress-sensitive paper anti-fake coating

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) 60 parts by weight of HAuCl 4 and 1 part by weight of M w 68kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 5 x 10 -6 M solution of PVP-DADMAN, mixed and boiled for 1 hour, then added 50 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1 hour, centrifuged at 8000 rpm for 15 minutes to obtain a supernatant; vacuum-dried the supernatant to obtain a modified nano Gold particles, the average particle size is 65nm;

[0030] (2) 1 weight part of M w 1 kg / mol of PEOS is dissolved in 3 parts by weight of ASA as the oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) is dispersed in water to make a solution with a concentration of 0.4% by mass, Add dilute hydrochloric acid dropwise to adjust the pH to 1, as the water phase; add the water phase to the oil phase, the volume ratio of the oil phase and the water phase is 1:5, stir ultrasonically at...

Embodiment 2

[0036] (1) 55 parts by weight of HAuCl 4 and 1 part by weight of M w 68kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 5 x 10 -6 The solution of PVP-DADMAN of M, mixed and boiled for 1h, then added 70 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1h, centrifuged at 10000rpm for 15min to obtain the supernatant, the TEM picture of the supernatant is as follows figure 1 Shown; Obtain modified nano-gold particles after the supernatant is vacuum-dried, and the average particle diameter is 40nm;

[0037] (2) 2 parts by weight of M w1 kg / mol of PEOS is dissolved in 12 parts by weight of ASA as the oil phase; 2 parts by weight of the modified nano-gold prepared in step (1) is dispersed in water to make a solution with a concentration of 0.8% by mass, Add dilute hydrochloric acid dropwise to adjust the pH to 2, as the water phase; add the water phase to the oil phase, the vol...

Embodiment 3

[0043] (1) 20 parts by weight of HAuCl 4 and 1 part by weight of M w 68kg / mol of PVP-DADMAN were dissolved in water to obtain a concentration of 1 × 10 -2 MHAuCl 4 solution and concentration of 5 x 10 -6 M solution of PVP-DADMAN, mixed and boiled for 1 hour, then added 100 parts by weight of ascorbic acid, stirred and reacted in the dark at 98°C for 1 hour, centrifuged at 20,000 rpm for 25 minutes to obtain a supernatant; vacuum-dried the supernatant to obtain a modified nano Gold particles, the average particle size is 18nm;

[0044] (2) 5 parts by weight of M w 1 kg / mol of PEOS is dissolved in 100 parts by weight of ASA as the oil phase; 1 part by weight of the modified nano-gold prepared in step (1) is dispersed in water to make a solution with a concentration of 1.2% by mass. Add dilute hydrochloric acid dropwise to adjust the pH to 4, as the water phase; add the water phase to the oil phase, the volume ratio of the oil phase and the water phase is 1:1, stir ultrasoni...

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Abstract

The invention provides a preparation method of a stress-sensitive paper anti-fake coating. The preparation method includes: (1), dissolving HAuCl4 and PVP-DADMAN in water, boiling, adding a reducing agent, avoiding light for stirring reaction, centrifuging, and performing vacuum drying on supernatant to obtain modified nanogold particles; (2), diluting PEOS in ASA to serve as an oil phase; dissolving modified nanogold prepared in the step (1) in water, and adjusting pH to acidic to serve as an aqueous phase; ultrasonically stirring the aqueous phase and the oil phase while heating, and standing to obtain a Pickering emulsion of oil-in-water ASA, namely the stress-sensitive paper anti-fake coating. By the preparation method, the stable Pickering emulsion of oil-in-water ASA can be obtained,coalescence among ASA oil drops can be reduced effectively, and stability of the emulsion is improved substantially; no aqueous phase and oil phase are separated out after the emulsion is stable forseveral months, and no surfactant and other modifiers need to be added.

Description

technical field [0001] The invention belongs to the application field of nanometer materials in papermaking, and in particular relates to a preparation technology of stress-sensing alkenyl succinic anhydride (ASA) paper anti-counterfeiting emulsion. Background technique [0002] Anti-counterfeiting coatings can be applied to commodity packaging and trademark design to prevent products from being counterfeited, and provide a powerful means for product producers, consumers and distributors to distinguish the authenticity of commodities. The application of anti-counterfeiting coatings generally meets the following conditions: discoloration is reversible, triggers inductance such as discoloration at room temperature, discoloration is stable, accurate, and vivid, and generally does not contain heavy metals, toxic substances, and corrosive acid-base substances. Anti-counterfeit coatings cannot be put on the market as general commodities. Generally, an enterprise should have a mono...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/38D21H19/46D21H19/48D21H21/16D21H21/44B22F1/00B22F9/24B82Y30/00
CPCD21H19/38D21H19/46D21H19/48D21H21/16D21H21/44B82Y30/00B22F9/24B22F1/054B22F1/102
Inventor 于得海王慧丽侯夫庆戴仁刚崔杰东王肖肖郭文艳刘温霞李国栋宋兆萍
Owner 辽宁兴东科技有限公司
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