CN104761954A - Carbon-dioxide-sensitive color-shifting ink and preparation method thereof - Google Patents
Carbon-dioxide-sensitive color-shifting ink and preparation method thereof Download PDFInfo
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- CN104761954A CN104761954A CN201510185594.2A CN201510185594A CN104761954A CN 104761954 A CN104761954 A CN 104761954A CN 201510185594 A CN201510185594 A CN 201510185594A CN 104761954 A CN104761954 A CN 104761954A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
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Abstract
The invention discloses a carbon-dioxide-sensitive color-shifting ink. The color-shifting ink comprises the following components: a pH-value-sensitive dye, a phase transfer catalyst, a plasticizer, a binding agent and an organic solvent. The invention also discloses a preparation method of the carbon-dioxide-sensitive color-shifting ink. The carbon-dioxide-sensitive color-shifting ink has sensitivity to the changes in the concentration of carbon dioxide in the environment, and can be used for detecting carbon dioxide. When the color-shifting ink forms a film, the film has relatively high adhesion, such that printing requirements on ink adhesion and friction resistance can be met. Also, the color-shifting ink has high film-forming performance and toughness, such that production processing requirements on ink performances can be met.
Description
Technical field
The present invention relates to ink area, particularly relate to color shifting ink of a kind of carbonic acid gas sensitivity and preparation method thereof.
Background technology
In daily life, detect gas concentration lwevel in real time all to have great importance to packaging, medical treatment and space environment:
In packaging, perishable foodstuff can be putrid and deteriorated gradually under suitable temperature, humidity and aerobic environment, go bad for preventing product, some products adopt modified atmosphere packaging (MAP), being sealed to by product is full of in the packing bag of carbon dioxide, and the quality guaranteed period is indicated outside packaging, by contrast actual date and quality guaranteed period, human consumer distinguishes whether product goes bad.But product unmetamorphosed prerequisite within the quality guaranteed period is that packaging has good sealing effectiveness, and as package encapsulation weak effect, product may go bad equally within the quality guaranteed period indicated, edible deteriorating items has injury to human body;
In medical, the breath state detecting patient goes detection patient breath to determine that whether patient respiration is normal mainly through hand, do not have intuitive and real-time, some critically ill patients may because adnormal respiration be by Timeliness coverage, causes not take treatment measure in time and dead;
In space environment, there is a large amount of people to be in relatively airtight space (as in car, in cubicle, in vault) every year and cause because carbonic acid gas suffocates extremely.
But, lack at present and a kind ofly possess batch production, low cost and convenient and practical gas concentration lwevel testing tool.Therefore, develop a kind of carbonic acid gas sensitive color change ink to have great importance.
Have a kind of intelligent pigment and optically variable films in prior art, it can with carbon dioxide reaction and variable color, can be used as composition detection reagent or anti-fake material is used.But, when it applies to pack upper, there is following problem:
1, when this intelligent pigment uses, it can only adopt the mode of coating or dip-dye to be applied on wrapping material, when after its solvent (as water) drying, because of its bad adhesion, this intelligent pigment can only be attached to package material surface in the form of granules, its sticking power, crocking resistance, folding quality all cannot meet the requirement of Package Design, and the shake in production process or scraping make granules of pigments very easily come off; Simultaneously because the reactive dyestuffs composition of intelligent pigment has certain toxicity, when adopting the mode of coating or dip-dye to apply to wrapping material, especially when pigment sticking power is not strong, being in the virose reactive dyestuffs composition of wrapping material top layer tool is very easily infected with on product or human body, eats or uses this product to have certain harm to HUMAN HEALTH.
2, the viscosity of this intelligent pigment, film-forming properties and snappiness all cannot meet the requirement of print production processing.
Summary of the invention
Main purpose of the present invention is the color shifting ink providing a kind of carbonic acid gas sensitivity, is intended to solve the cohesiveness of existing intelligent pigment and snappiness is poor and this intelligent dye film exists the technical problem of aberration in different environments.
For achieving the above object, the invention provides a kind of color shifting ink of carbonic acid gas sensitivity, described color shifting ink comprises following component: pH value sensitive dye, phase-transfer catalyst, softening agent, binding agent and organic solvent.
Preferably, described color shifting ink also comprises organic acid, and described color shifting ink is in acid.
Preferably, described pH value sensitive dye is at least one in m-cresol purple, thymolphthalein, o-cresolphthalein, dibromothymolsulfonphthalein, o-cresolsulfonphthalein, cetyltrimethyl ammonium positively charged ion, toluylene red, phenol red, rhodamine, Sulforhodamine 101 and thymolsulfonphthalein.
Preferably, described phase-transfer catalyst is at least one in quaternary ammonium salt, sodium hydroxide and sodium bicarbonate.
Preferably, described quaternary ammonium salt is TBAH or tetraethyl ammonium hydroxide.
Preferably, described binding agent is at least one in polyvinyl butyral acetal, nitro-cotton, polyvinyl alcohol, Natvosol and hydroxypropylcellulose.
Preferably, described softening agent is at least one in glycerine, diisodecyl adipate, tributyl phosphate and dimethyl phthalate.
Preferably, described organic acid is at least one in unitary aliphatic saturated monocarboxylic acid.
In addition, for achieving the above object, the present invention also provides a kind of preparation method of color shifting ink of carbonic acid gas sensitivity, and it is as follows that described preparation method comprises step:
Step one, the aqueous solution preparing phase-transfer catalyst and the organic acid aqueous solution;
Step 2, pH value sensitive dye is dissolved in organic solvent, then adds the aqueous solution of described phase-transfer catalyst, make the first solution;
Step 3, by the described organic acid aqueous solution and described first solution mixing, vaporize water and organic solvent under vacuum, forms granulated powders, and grinds this granulated powders;
Step 4, by grinding after granulated powders again dissolve in organic solvent, make the second solution;
Step 5, in described second solution, add binding agent, softening agent, fully stir, obtained in acid color shifting ink.
Preferably, described pH value sensitive dye is at least one in m-cresol purple, thymolphthalein, o-cresolphthalein, dibromothymolsulfonphthalein, o-cresolsulfonphthalein, cetyltrimethyl ammonium positively charged ion, toluylene red, phenol red, rhodamine, Sulforhodamine 101 and thymolsulfonphthalein;
Described phase-transfer catalyst is at least one in quaternary ammonium salt, sodium hydroxide and sodium bicarbonate;
Described organic acid is at least one in unitary aliphatic saturated monocarboxylic acid;
Described binding agent is at least one in polyvinyl butyral acetal, nitro-cotton, polyvinyl alcohol, Natvosol and hydroxypropylcellulose;
Described softening agent is at least one in glycerine, diisodecyl adipate, tributyl phosphate and dimethyl phthalate.
The binding agent of the color shifting ink of carbonic acid gas sensitivity of the present invention has filming function after ink solidification, on the one hand, strengthen the sticking power of color shifting ink, make its satisfied requirement of printing ink adhesion and rub resistance power, on the other hand, to pH value sensitive dye, there is provide protection after binding agent film forming, avoid pH value sensitive dye directly to contact with product, the softening agent of this color shifting ink enhances the snappiness of color shifting ink, meets the performance requriements of process for processing to ink, the solvent that this color shifting ink contains can regulate the viscosity of ink, meets the requirement of the different printing modes such as offset printing, flexo, silk-screen and gravure, the phase-transfer catalyst of this color shifting ink strengthens the sensitivity of ink to carbonic acid gas, in addition, this color shifting ink can carry out local printing, avoids the phenomenon causing color inconsistent because different altitude height gas concentration lwevel is inconsistent when optically variable films is applied to packs upper with overlay film form, overcomes aberration problem, further, the color shifting ink of this carbonic acid gas sensitivity also comprises organic acid, this organic acid makes color shifting ink be acid, this color shifting ink has susceptibility to the gas concentration lwevel change in environment, when gas concentration lwevel in environment raises, carbonic acid gas penetrates in color shifting ink, color shifting ink pH value is caused to raise, the color of color shifting ink changes, when gas concentration lwevel in environment reduces, in color shifting ink, carbonic acid gas is separated out, color shifting ink pH value is caused to reduce, chromic ink colors generation Back Up, because the infiltration of the carbon dioxide in this color shifting ink and precipitation have persistence, therefore, this color shifting ink can be employed as a kind of timing ink.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of color shifting ink of carbonic acid gas sensitivity, in a preferred embodiment, it is as follows that this color shifting ink comprises component: pH value sensitive dye, phase-transfer catalyst, softening agent, binding agent and organic solvent.
The binding agent of the color shifting ink of this preferred embodiment has filming function after ink solidification, on the one hand, strengthen the sticking power of color shifting ink, make its satisfied requirement of printing ink adhesion and rub resistance power, on the other hand, to pH value sensitive dye, there is provide protection after binding agent film forming, avoid pH value sensitive dye directly to contact with product; The softening agent of this color shifting ink enhances the snappiness of color shifting ink, meets the performance requriements of process for processing to ink; The solvent that this color shifting ink contains can regulate the viscosity of ink, meets the requirement of the different printing modes such as offset printing, flexo, silk-screen and gravure; The phase-transfer catalyst of this color shifting ink strengthens the sensitivity of ink to carbonic acid gas; In addition, this color shifting ink can carry out local printing, avoids the phenomenon causing color inconsistent because different altitude height gas concentration lwevel is inconsistent when optically variable films is applied to packs upper with overlay film form, overcomes aberration problem.
In a preferred embodiment, the color shifting ink of this carbonic acid gas sensitivity also comprises organic acid, and the color shifting ink of this carbonic acid gas sensitivity is in acid.
The color shifting ink of the carbonic acid gas sensitivity of the preferred embodiment has susceptibility to the gas concentration lwevel change in environment, when gas concentration lwevel in environment raises, carbonic acid gas penetrates in color shifting ink, color shifting ink pH value is caused to raise, the color of color shifting ink changes, when gas concentration lwevel in environment reduces, in color shifting ink, carbonic acid gas is separated out, color shifting ink pH value is caused to reduce, chromic ink colors generation Back Up, because the infiltration of the carbon dioxide in this color shifting ink and precipitation have persistence, therefore, this color shifting ink can be employed as a kind of timing ink.
In a preferred embodiment, this pH value sensitive dye is to pH value sensitive, and after the pH value of color shifting ink changes, the color of this pH value sensitive dye also changes.This pH value sensitive dye is insoluble or be slightly soluble in water, is soluble in organic solvent.Optional pH value sensitive dye is at least one in m-cresol purple (MCP), thymolphthalein, o-cresolphthalein, dibromothymolsulfonphthalein (BTB), o-cresolsulfonphthalein, cetyltrimethyl ammonium positively charged ion (CTA), toluylene red (NR), phenol red (PR), rhodamine (R6G), Sulforhodamine 101 and thymolsulfonphthalein.Wherein, this cetyltrimethyl ammonium positively charged ion can be produced by trimethylammonium hexadecyl brometo de amonio or trimethylammonium cetyl chloride ammonium.Should be appreciated that other all can be used as pH value sensitive dye of the present invention to the material of pH value sensitivity.This pH value sensitive dye is phenol red, dibromothymolsulfonphthalein or m-cresol purple preferably, now for dibromothymolsulfonphthalein, the instruction mechanism of pH value sensitive dye is described: this color shifting ink is in acid, in acid condition, dibromothymolsulfonphthalein is in yellow, namely this color shifting ink is shown as yellow, along with the infiltration of the carbonic acid gas in environment, this carbonic acid gas and color shifting ink react, the pH value of color shifting ink is caused to raise, ink colors along with changing gradually, and is finally shown as blueness, and then can judge the concentration of carbonic acid gas according to colour-change; Otherwise because the reaction between carbonic acid gas and color shifting ink is reversible reaction, when the gas concentration lwevel in environment declines, carbonic acid gas oozes out from color shifting ink, thus this color shifting ink finally can become yellow from blueness.
In a preferred embodiment, this phase-transfer catalyst water soluble, and to organic solvent, there is stronger avidity.Its in formula, play two in effect: on the one hand, produce positively charged ion when it is water-soluble and can produce with dye anion and match, the solubleness of promotion pH value sensitive dye in water; On the other hand, phase-transfer catalyst easily absorbs the carbonic acid gas in air, and reaction generates alkaline matter with it, the pH value of color shifting ink is raised, thus the color of pH value sensitive dye is changed.Optional phase-transfer catalyst is at least one in quaternary ammonium salt, sodium hydroxide and sodium bicarbonate.The content of this phase-transfer catalyst is large, and the color change of ink is fast, and the content of phase-transfer catalyst is little, and the color change of ink is slow.Should be appreciated that the material possessing above-mentioned two kinds of functions all can be used as phase-transfer catalyst of the present invention.Further, this quaternary ammonium salt is preferably TBAH or tetraethyl ammonium hydroxide.
In a preferred embodiment, this organic acid plays acidification to color shifting ink in formula, makes color shifting ink initial pH in acid, and then after color shifting ink and carbonic acid gas react, pH value becomes alkalescence from acidity, meets the requirement of pH value sensitive dye variable color.After color shifting ink acidifying, pH value is in acid, and color shifting ink forms reference color.Optional organic acid is at least one in unitary aliphatic saturated monocarboxylic acid, such as: the carbon chain carboxylic acids of acetic acid, propionic acid, butyric acid or other more carbonatomss.When as timing ink, change time-count cycle by changing organic acid kind.Use high boiling point VFA, it is longer that it changes the color time used, uses lower boiling VFA, and it is shorter that it changes the color time used.
In a preferred embodiment, this binding agent has drying and forming-film characteristic, makes it meet the requirement of printing to sticking power.Available binding agent is at least one in polyvinyl butyral acetal (PVB), nitro-cotton (NC), polyvinyl alcohol (PVA), Natvosol (HEC) and hydroxypropylcellulose (HPC).
In a preferred embodiment, this softening agent plays in formula increases color shifting ink viscosity, film-forming properties and flexible effect, make color shifting ink meet the requirement of print production technique, optional softening agent is at least one in diisodecyl adipate, tributyl phosphate and dimethyl phthalate.Alternatively, glycerine also can be used as softening agent and is used.This softening agent is preferably tributyl phosphate or glycerine.When the color shifting ink of this preferred embodiment is as timing ink, change time-count cycle by the content changing softening agent.Plasticizer loading is high, because plasticizer molecule can insert between binding agent molecular chain, weakens binding agent Intermolecular Forces, increase the Distance geometry activity space between binding agent molecular chain, during its content height, alkaline volatile matter is more volatile, and the time that color changes is short; Otherwise plasticizer loading is low, the time that color changes is long.
In a preferred embodiment, this organic solvent can be at least one in methyl alcohol, ethanol, acetoneand ethyl acetate.
The present invention also provides a kind of preparation method of color shifting ink of carbonic acid gas sensitivity, and in a preferred embodiment, it is as follows that this preparation method comprises step:
Step one, the aqueous solution preparing phase-transfer catalyst and the organic acid aqueous solution;
Step 2, pH value sensitive dye is dissolved in organic solvent, then adds the aqueous solution of this phase-transfer catalyst, make the first solution;
Step 3, by the organic acid aqueous solution and the mixing of the first solution, by water and organic solvent evaporation under vacuum condition, form granulated powders, and grind this granulated powders;
Step 4, by grinding after granulated powders again dissolve in organic solvent, make the second solution;
Step 5, in the second solution, add binding agent, softening agent, fully stir, obtained in acid color shifting ink.
In a preferred embodiment, this step 3 is specially:
By the organic acid aqueous solution and the mixing of the first solution, utilize Rotary Evaporators under vacuum by water and organic solvent evaporation, form granulated powders, and use mortar further granulated powders to be ground to form tiny powder.
1 ~ 3 color shifting ink of carbonic acid gas sensitivity of the present invention and preparation method thereof is described further by the following examples:
Embodiment 1
1, presetting phase-transfer catalyst and the organic acid aqueous solution
Aqueous sodium hydroxide solution and the volume percent of allotment 1mol/L are the acetic acid aqueous solution of 5%.
2, the first solution is allocated
Join in 10ml ethanol by phenol red for 1.6g, stir until Phenol red dissolves, then add the aqueous sodium hydroxide solution of 8ml1mol/L, make the first solution.
3, powder is prepared
By the volume percent of 1ml be 5% acetic acid aqueous solution be added in the first solution, stirring makes its Homogeneous phase mixing, solution is transferred in the flask of rotatory evaporator, evaporating solvent under vacuum conditions, make yellow particle powder, use mortar that yellow particle powder is ground to form fine powder further;
4, the second solution is allocated
Above-mentioned fine powder is dissolved in again in 10ml ethanol, stirs, make the second solution;
5, color shifting ink is prepared
In the second solution, add the polyvinyl butyral acetal of 1.5g, the glycerine of 0.08g, fully stir, namely make the color shifting ink of yellow, viscous.
After printing, the NaOH in color shifting ink absorbs the CO in air
2, and reaction generates Na with it
2cO
3, and generate NaHCO further
3, reaction equation is as follows:
2NaOH+CO
2＝Na
2CO
3+H
2O；
Na
2CO
3+CO
2+H
2O＝2NaHCO
3；
The NaHCO produced
3na is ionized out after dissolving
+and HCO
3 -, its ionization equation is as follows:
NaHCO
3＝HCO
3 -+Na
+；
Due to HCO
3 -ion has the feature of facile hydrolysis, difficult ionization, solution alkaline after hydrolysis, and its hydrolysis equation is as follows:
HCO
3 -+H
2O＝H
2CO
3+OH
-；
Along with ink and CO
2sustained reaction, pH value rises, and ink alkalescence strengthens, and also therefore by yellow, progressively pulverize is red thereupon for ink.
Should be appreciated that due to H
2cO
3instability, can be analyzed to CO
2and H
2o, therefore, after extraneous gas concentration lwevel reduces, carbonic acid gas is separated out from ink, and ink pH value will reduce gradually, and acid enhancing, ink colors also changes thereupon.
Embodiment 2
1, presetting phase-transfer catalyst and the organic acid aqueous solution
Allotment substances content is the TBAH aqueous solution of 1mol/L and volume percent is the acetic acid aqueous solution of 5%.
2, the first solution is allocated
1.6g Bromothymol blue is joined in 10ml ethanol, stir until Bromothymol blue dyestuff dissolves, then add the TBAH aqueous solution of 8ml 1mol/L, make the first solution.
3, powder is prepared
By the volume percent of 1ml be 5% acetic acid aqueous solution be added in the first solution, stirring makes its Homogeneous phase mixing, solution is transferred in the flask of rotatory evaporator, evaporating solvent under vacuum conditions, make yellow particle powder, use mortar that yellow particle powder is ground to form fine powder further;
4, the second solution is allocated
Above-mentioned fine powder is dissolved in again in 10ml ethanol, stirs, make the second solution;
5, color shifting ink is prepared
In the second solution, add the polyvinyl butyral acetal of 1.5g, the glycerine of 0.08g, fully stir, namely make the color shifting ink of yellow, viscous.
Along with ink and CO
2sustained reaction, ink alkalescence strengthens, and pH value rises, and therefore ink also become blue by yellow thereupon gradually, and the reaction mechanism of the present embodiment is similar to Example 1, and therefore not to repeat here.
Should be appreciated that due to H
2cO
3instability, can be analyzed to CO
2and H
2o, therefore, after extraneous gas concentration lwevel reduces, carbonic acid gas is separated out from ink, and ink pH value will reduce gradually, and acid enhancing, ink colors also changes thereupon.
Embodiment 3
1, presetting phase-transfer catalyst and the organic acid aqueous solution
The TBAH aqueous solution and the volume percent of allotment 1mol/L are the acetic acid aqueous solution of 5%.
2, the first solution is allocated
1.7g m-cresol purple is joined in 10ml ethanol, stir until m-cresol purple dyestuff dissolves, then add the TBAH aqueous solution of 8ml 1mol/L, make the first solution.
3, powder is prepared
By the volume percent of 1ml be 5% acetic acid aqueous solution be added in the first solution, stirring makes its Homogeneous phase mixing, solution is transferred in the flask of rotatory evaporator, evaporating solvent under vacuum conditions, make yellow particle powder, use mortar that yellow particle powder is ground to form fine powder further;
4, the second solution is allocated
Above-mentioned fine powder is dissolved in again in 10ml ethanol, stirs, make the second solution;
5, color shifting ink is prepared
In the second solution, add the polyvinyl butyral acetal of 1.5g, the glycerine of 0.08g, fully stir, namely make the color shifting ink of yellow, viscous.
After printing, along with ink and CO
2sustained reaction, ink degree of alkalinity increase, pH value rise, therefore ink also become red-purple by yellow thereupon, and the reaction mechanism of the present embodiment is similar to Example 1, and therefore not to repeat here.
Should be appreciated that due to H
2cO
3instability, can be analyzed to CO
2and H
2o, therefore, after extraneous gas concentration lwevel reduces, carbonic acid gas is separated out from ink, and ink pH value will reduce gradually, and acid enhancing, ink colors also changes thereupon.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a color shifting ink for carbonic acid gas sensitivity, is characterized in that, described color shifting ink comprises following component: pH value sensitive dye, phase-transfer catalyst, softening agent, binding agent and organic solvent.
2. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 1, it is characterized in that, described color shifting ink also comprises organic acid, and described color shifting ink is in acid.
3. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 1 or 2, it is characterized in that, described pH value sensitive dye is at least one in m-cresol purple, thymolphthalein, o-cresolphthalein, dibromothymolsulfonphthalein, o-cresolsulfonphthalein, cetyltrimethyl ammonium positively charged ion, toluylene red, phenol red, rhodamine, Sulforhodamine 101 and thymolsulfonphthalein.
4. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 1 or 2, it is characterized in that, described phase-transfer catalyst is at least one in quaternary ammonium salt, sodium hydroxide and sodium bicarbonate.
5. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 4, it is characterized in that, described quaternary ammonium salt is TBAH or tetraethyl ammonium hydroxide.
6. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 1 or 2, it is characterized in that, described binding agent is at least one in polyvinyl butyral acetal, nitro-cotton, polyvinyl alcohol, Natvosol and hydroxypropylcellulose.
7. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 1 or 2, it is characterized in that, described softening agent is at least one in glycerine, diisodecyl adipate, tributyl phosphate and dimethyl phthalate.
8. the color shifting ink of carbonic acid gas sensitivity as claimed in claim 2, it is characterized in that, described organic acid is at least one in unitary aliphatic saturated monocarboxylic acid.
9. a preparation method for the color shifting ink of carbonic acid gas sensitivity, is characterized in that, it is as follows that described preparation method comprises step:
Step one, the aqueous solution preparing phase-transfer catalyst and the organic acid aqueous solution;
Step 2, pH value sensitive dye is dissolved in organic solvent, then adds the aqueous solution of described phase-transfer catalyst, make the first solution;
Step 3, by the described organic acid aqueous solution and described first solution mixing, vaporize water and organic solvent under vacuum, forms granulated powders, and grinds this granulated powders;
Step 4, by grinding after granulated powders again dissolve in organic solvent, make the second solution;
Step 5, in described second solution, add binding agent, softening agent, fully stir, obtained in acid color shifting ink.
10. preparation method as claimed in claim 9, is characterized in that,
Described pH value sensitive dye is at least one in m-cresol purple, thymolphthalein, o-cresolphthalein, dibromothymolsulfonphthalein, o-cresolsulfonphthalein, cetyltrimethyl ammonium positively charged ion, toluylene red, phenol red, rhodamine, Sulforhodamine 101 and thymolsulfonphthalein;
Described phase-transfer catalyst is at least one in quaternary ammonium salt, sodium hydroxide and sodium bicarbonate;
Described organic acid is at least one in unitary aliphatic saturated monocarboxylic acid;
Described binding agent is at least one in polyvinyl butyral acetal, nitro-cotton, polyvinyl alcohol, Natvosol and hydroxypropylcellulose;
Described softening agent is at least one in glycerine, diisodecyl adipate, tributyl phosphate and dimethyl phthalate.
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| CN109974948A (en) * | 2019-04-23 | 2019-07-05 | 杭州铭铄机电科技有限公司 | It is a kind of for detecting the detection device of water-cooled motor shell leakproofness |
| CN109974947A (en) * | 2019-04-23 | 2019-07-05 | 杭州铭铄机电科技有限公司 | A kind of water-cooled motor shell leak-testing apparatus convenient for fixing motor housing body |
| CN109974947B (en) * | 2019-04-23 | 2020-12-15 | 博兴战新产业发展有限公司 | Water-cooling motor casing leakproofness check out test set convenient to fixed motor casing |
| CN109974948B (en) * | 2019-04-23 | 2021-07-02 | 上海雷祥压铸有限公司 | Detection equipment for detecting sealing performance of water-cooling motor shell |
| CN115989289A (en) * | 2020-08-07 | 2023-04-18 | 国民大学校产学协力团 | Hydrogel coating composition for chemical sensor and chemical sensor manufactured using the same |
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