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Adhesive with indicating function

A binder and functional technology, applied in the field of binders with indicating functions, can solve problems such as waste and increased production costs, and achieve the effects of simple formula, low cost and reduced waste

Active Publication Date: 2010-09-15
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the adhesives produced in the industry are colorless, which will cause unnecessary waste due to repeated application during use.
With the diversification of people's demand for binder color, some companies have produced colored binders, but the pigments used will leave color on the bonded parts such as paper, which cannot meet people's general needs.
And the discoloration solid glue that CN101608103A reports, though can solve the problem of discoloration, but the main component of binding agent is polyvinylpyrrolidone, makes production cost improve greatly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Weigh 1g of gelatin, soak it in 1mL of water, and swell for later use.

[0028] 2) Weigh 0.06g thymolphthalein, dissolve it with 0.5mL ethanol, and set aside.

[0029] 3) Add 39mL of water into the beaker, heat to 50°C, add 3.5g of polyvinyl alcohol (the degree of polymerization is 1700, the degree of alcoholysis is 99%), heat up to boiling, make it fully dissolved, cool to room temperature, add 2.5g Sodium carboxymethyl cellulose (viscosity between 300-600 centipoise), stirring and dissolving, warming up to 50°C, adding the swelling gelatin prepared in step 1), stirring and dissolving, adding 1mL of 50% glutaraldehyde, stirring continuously to make React for 15 minutes, cool to room temperature, add thymolphthalein ethanol solution prepared in step 2), then add 0.5mL 5% sodium hydroxide solution, stir evenly, and obtain blue binder.

[0030] Take the prepared blue adhesive and apply it on the envelope, the coated part will show blue color, seal the envelope, the co...

Embodiment 2

[0032] 1) Weigh 1.5g of gelatin, soak it in 1.5mL of water, and swell it for later use.

[0033] 2) Weigh 0.1g thymolphthalein, dissolve it with 0.5mL ethanol, and set aside.

[0034] 3) Add 40mL of water into the beaker, heat it to 50°C, add 3g of polyvinyl alcohol (the degree of polymerization is 1700, the degree of alcoholysis is 99%), heat up to boiling, make it fully dissolved, cool to room temperature, add 3.5g of carboxy Sodium methylcellulose (viscosity between 300-600 centipoise), stirring and dissolving, warming up to 40°C, adding the swelling gelatin prepared in step 1), stirring and dissolving, adding 3mL of 25% glutaraldehyde, stirring constantly to make it React for 20 minutes, cool to room temperature, add the thymolphthalein ethanol solution prepared in step 2), then add 1.3mL 3% sodium hydroxide solution, stir evenly, and obtain the blue binder.

[0035] Take the prepared blue adhesive and apply it on the envelope, the coated part will show blue color, seal t...

Embodiment 3

[0037] 1) Weigh 1.5g of gelatin, soak it in 1.5mL of water, and swell it for later use.

[0038] 2) Weigh 0.1g of phenolphthalein, dissolve it with 0.5mL of ethanol, and set aside.

[0039] 3) Add 41mL of water into the beaker, heat it to 50°C, add 3g of polyvinyl alcohol (the degree of polymerization is 1700, the degree of alcoholysis is 99%), heat up to boiling, make it fully dissolved, cool to room temperature, add 3.5g of carboxyl Sodium methylcellulose (viscosity between 300-600 centipoise), stirring and dissolving, warming up to 40°C, adding the swelling gelatin prepared in step 1), stirring and dissolving, adding 2mL of 50% glutaraldehyde, stirring constantly to make it React for 20 minutes, cool to room temperature, add the phenolphthalein ethanol solution prepared in step 2), then add 1.3mL 3% sodium hydroxide solution, add an appropriate amount of cinnamic acid until there is a fragrance, and stir evenly to obtain a red binder.

[0040] Take the prepared red adhesiv...

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Abstract

The invention provides adhesive with indicating function. The adhesive with the indicating function is prepared by heating water to between 40 and 60 DEG C, adding polyvinyl alcohol into the water, heating the mixture till boiling to dissolve the polyvinyl alcohol, cooling the mixture to room temperature, adding sodium carboxymethylcellulose into the mixture, dissolving the sodium carboxymethylcellulose with stirring, continuously heating the mixture to between 40 and 50 DEG C, adding swelling gelatin into the mixture, stirring the mixture uniformly, adding glutaraldehyde into the mixture, stirring the mixture for 10 to 20 minutes, cooling the mixture to room temperature, then adding ethanol solution of triarylmethane leuco dye into the mixture, and adding sodium hydroxide solution into the mixture. The method has the advantages of simple and feasible preparation process, low cost and easy production; and the adhesive has the most prominent characteristics that the color of the adhesive can indicate the adhered part so as to reduce the waste of repeated coating, the color of the adhered part can fade in short time, and no trace is left.

Description

technical field [0001] The invention relates to a chemical adhesive, in particular to an adhesive with indicating function. Background technique [0002] At present, most of the adhesives produced in the industry are colorless, which will cause unnecessary waste due to repeated application during use. Along with people's diversified demands to the adhesive color, some enterprises have produced colored adhesive, but the used pigment can leave color on the bonded parts such as paper, and can not satisfy people's general demand. And the discoloration solid glue that CN101608103A reports, though can solve the problem of discoloration, but the main component of binding agent is polyvinylpyrrolidone, makes production cost improve greatly. Contents of the invention [0003] The object of the present invention is to provide an adhesive with indicating function and a preparation method thereof with lower production cost. [0004] A kind of binding agent with indicating function p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J101/26C09J189/00C09J11/06C09J9/00
Inventor 宋金萍张晓婷王毅董川双少敏
Owner STATE GRID CORP OF CHINA
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