CN105623380A - White board dry-cleaning ink and preparation method thereof - Google Patents

Abstract

The invention provides a white board dry-cleaning ink and a preparation method thereof. The ink comprises the following components: 2-8% of a coloring agent, 2-6% of film-forming resin, 4-6% of a humectant, 0.6-5% of a surfactant, 0.5-6% of a dispersing agent, 1.2-6% of a lubricant, and 60-90% of a solvent. The preparation method comprises the following steps: mixing the coloring agent, the film-forming resin, the humectant, the lubricant, the dispersing agent and a proper of the solvent by a high speed dispenser; processing the components by a sand mill and a high pressure homogenizer in order to obtain a color paste; adding the surfactant in the color paste, diluting the material by the solvent, and shearing the material and dispersing the material to obtain the white board dry-cleaning ink. The white board dry-cleaning ink has the advantages of good stability after long-term storage, instant drying, long-term dry-cleaning, long moisture-retention time, and no toxicity.

Description

A kind of dry-erase white board board pen ink and preparation method thereof

Technical field

The present invention relates to technical field of ink, especially a kind of dry-erase white board ink and preparation method thereof.

Background technology

The health of teachers and students is caused very big injury by the educational aids such as traditional chalk, and in long-term teaching, the dust pollution that chalk teaching model causes can cause the illness such as teaching profession's property pharyngolaryngitis, pulmonary disease. Along with social development, owing to blank is relative to traditional blackboard, there is advantages such as writing facility, smoothness, clean, environmental protection, be increasingly widely used, and white board marker black ink is increasingly becoming in school supply and stationery most important a kind of ink.

Existing white board pen ink adopts chemical industry synthetic dyestuffs mostly, adds organic solvent, life-time service, teachers ' health is had a negative impact; And its effective ingredient prevalent particles is relatively big, poor stability easily precipitates, it may appear that writing not smooth, the font color depth is uneven, even blocks the situation of nib; And stable storing performance poor (2 months thin out), color and luster is dull, and the time of raising one's hat is 10 minutes, out of ink not smooth, clean rate variance, and not environmentally, existing a lot of ink for whiteboard need special wiping solution to wipe, or need liquid to wipe, and bring a lot of inconvenience to teaching.

Summary of the invention

The technical problem to be solved is to provide a kind of dry-erase white board board pen ink and manufacture method thereof, has that high stability, moisture retention be good, xerotripsis good characteristics good, avirulent.

The present invention solves that above-mentioned technical problem employed technical scheme comprise that a kind of dry-erase white board ink of offer, comprise following component by weight percentage:

Coloring agent: 2%��8%

Film-forming resin: 2%��6%

Wetting agent: 4%��10%

Surfactant: 0.6%��5%

Dispersant: 0.5%��6%

Lubricant: 1.2%��6%

Solvent: 60%��90%

Above-mentioned dry-erase white board board pen ink, wherein said surfactant is sucrose ester, sodium alkyl sulfate or its combination; Dispersant is phosphoric acid salt, it is preferred that described dispersant adopts sodium tripolyphosphate, sodium pyrophosphate, sodium hexameta phosphate or its combination; Lubricant is dibutyl ester, stearic acid or its combination, film-forming resin hydroxymethyl cellulose, polyvinyl butyral resin or its combination.

Above-mentioned dry-erase white board board pen ink, wherein said wetting agent is Polyethylene Glycol; Described solvent is lower alcohols, it is preferred that described solvent adopts ethanol, propanol, isopropanol or its combination; Coloring agent is white carbon black.

The preparation method that present invention also offers a kind of dry-erase white board ink, it is characterised in that comprise the following steps:

Use high speed dispersor mixed colorant, film-forming resin, wetting agent, dispersant, lubricant and appropriate solvent;

Process through sand mill and high pressure homogenizer successively and obtain color slurry;

Mill base adds surfactant, through solvent dilution, shears dispersion and obtains xerotripsis ink for whiteboard.

The present invention contrasts prior art following beneficial effect: dry-erase white board board pen ink provided by the invention and preparation method thereof, white board pen ink stable performance, the time of raising one's hat of adding surfactant, dispersant and lubricant and prepare can reach more than 24h, and person's handwriting is uniform, cost is low, technique is simple; The easy wiping of written handwriting, to advantages such as human body close friend are healthy.

Detailed description of the invention

Hereinafter each component of the present invention is described in detail:

1, coloring agent:

Coloring agent is insoluble in dyestuff or the pigment of solvent mostly, due to the easy crystallization of dye component, writes not smooth, so the coloring agent of ink adopts pigment mostly at present. And white carbon black has resistance to water, light resistance, degree of staining height and hypotoxicity, so black ink commonly uses white carbon black as coloring agent, it not easily precipitates with graininess suspended dispersed in a solvent, thus forming the dispersion of stable homogeneous with other component.

The consumption of pigment determines with the degree of depth of required color and stability, and content is 1%��8%. If pigment content is too high, can cause that the viscosity of ink increases, thus affecting water rate when white board marker is write; If pigment content is too low, causing the viscosity degradation of ink, thus stability declines, pigment preferable amount is 6%��8%.

2, film-forming resin:

Resin is to have multiple action in the ink, contributes to pigment dispersed, improves ink wetting capacity, improves ink film-formation result, regulates ink viscosity size, therefore, to having the greatest impact of the writing quality particularly xerotripsis of ink. The resin often selected should be good with selected solvent intermiscibility, and moderate viscosity, the present invention selects polyvinyl acetate, carboxymethyl cellulose, polyvinylpyrrolidone, polyvinyl butyral resin, preferentially adopts hydroxymethyl cellulose, polyvinyl butyral resin or its combination. If resin too high levels, ink viscosity is too high and affects water rate; If resin content is too low, causing that ink marks is difficult to wipe, film-forming resin preferable amount is 2%��4%.

3, wetting agent:

Desirable wetting agent plays the effect of moistening carbon blacksurface in the ink, also have, with solvent, oil preparation, there is the good compatibility, and there is the function absorbing moisture in air after solvent vapors away, but on the moistening effect of ink with thin out have certain impact when inhomogeneity and different amounts, therefore, the wetting agent that the present invention adopts is Polyethylene Glycol. If content of humectant is very few, the time of raising one's hat of its corresponding white board marker can reduce; If content of humectant is too much, ink viscosity increases, and affects out of ink, and wetting agent preferable amount is 6%��8%.

4, surfactant:

The Main Function of surfactant is dispersion, moistening, plasticising, emulsifying etc., and conventional surfactant has: nonionic surfactant, such as polyoxyethylene-type, polyol type etc.; Anion surfactant, such as carboxylate, sulfonate, sulfuric acid etc. The combination of different surfaces activating agent uses often has potentiation, as nonionic and anion surfactant share, space resistance can be formed between particles, preventing granules of pigments in ink from sinking and flocculation, the surfactant that therefore present invention selects is nontoxic sucrose ester and sodium alkyl sulfate combination. If the too high levels of surfactant, ink xerotripsis declines, and is stained with even a little plate; If surface-active contents is too low, stability of ink and time of raising one's hat decline, and surfactant preferable amount is 3%��4%, sucrose ester and sodium alkyl sulfate 9:3.

5, dispersant:

Dispersant molecule has lipophilic group and hydrophilic group material. Both materials make it have some characteristic not available for other organic compound in aqueous solution and oil solution, it can make to carry out between liquid insoluble mutually being emulsified into mix homogeneously medium, and the solids dispersion at liquid phase medium and suspension are played an important role by this. And the selection of dispersant often and with in ink adopt pigment relevant, the surface charge of pigment and granularity all can affect the selection of wetting dispersing agent, the dispersant that the present invention selects is phosphoric acid salt, it is preferred that described dispersant adopts sodium tripolyphosphate, sodium pyrophosphate, sodium hexameta phosphate or its combination. Too much or very few ground dispersant addition all can decline easily caused by stability of ink. Dispersant preferable amount is 0.5%��2%.

6, lubricant:

The lubricant added in ink must possess and have the good compatibility with solvent, resin, ink has good ductility simultaneously, and after solvent vapors away, makes film forming ink can be good at peeling off. The present invention adopts dibutyl ester, stearic acid or its combination as lubricant. If lubricant quantity is too much, can cause that viscosity is too high, and dysgraphia; If lubricant quantity is very few, easily causes writing surface irregularity, not easily wipe. Lubricant preferable amount is 4%��6%.

7, solvent:

The bulk composition of ink is solvent, is used for being scattered here and there toner and dissolving other component, it is provided that certain mobility, also to knock the volatility of benefit, it is ensured that the quick-drying of film. The organic solvents such as easy volatile solvent such as alcohols, ketone, the esters of energy dissolving resin, from the viewpoint of nontoxic, inexpensive, volatility is moderate, the solvent that the present invention selects is the lower alcohols that toxicity is relatively low, it is preferred that described solvent adopts ethanol, propanol, isopropanol or its combination. And the consumption of solvent is determined by the viscosity of ink, the k value of regulation white board pen ink is at 6.0-20.0mPa s within the scope of this in light industry standard QB/T4167-2011 " whiteboard marker pen ink ", viscosity is excessive, and it is slow that ink fills pen speed degree, the slow not even water outlet of water under nib when writing; Viscosity is too small, and it is too fast that ink fills a hourly velocity, and when writing, under nib, water is too fast, causes that burr occurs in writing. Solvent preferable amount is 70%��80%.

Embodiment 1:

A kind of dry-erase white board ink, is made up of the raw material of following weight portion:

Pigment: white carbon black 7%, film-forming resin: hydroxymethyl cellulose 4%; Wetting agent: Polyethylene Glycol 6%; Surfactant: sucrose ester 2.25%, sodium alkyl sulfate 0.75%; Dispersant: sodium pyrophosphate 2%; Lubricant: dibutyl ester 2%, stearic acid 1.5%; Solvent: ethanol 70%

The preparation method of above-mentioned ink for whiteboard, comprises the following steps: use high speed dispersor mixed colorant, film-forming resin, wetting agent, dispersant, xerotripsis agent and appropriate solvent; Process through sand mill and high pressure homogenizer successively and obtain color slurry; Mill base adds surfactant, through solvent dilution, shears dispersion and obtain xerotripsis ink for whiteboard.

Comparative example 1:

In comparative example 1, ink for whiteboard formula is sucrose ester 1.5% with the surfactant of the be different in that addition of embodiment 1, sodium alkyl sulfate 1.5%, and preparation method is identical with embodiment 1.

Embodiment 2:

A kind of dry-erase white board ink, is made up of the raw material of following weight portion:

Pigment: white carbon black 8%, film-forming resin: polyvinyl butyral resin 3%; Wetting agent: Polyethylene Glycol 6.7%; Surfactant: sucrose ester 2.25%, sodium alkyl sulfate 0.75%; Dispersant: sodium hexameta phosphate 0.2%, sodium pyrophosphate 1%; Lubricant: dibutyl ester 1.7%, stearic acid 1.2%; Solvent: ethanol 75%

The preparation method of above-mentioned ink for whiteboard, comprises the following steps: use high speed dispersor mixed colorant, film-forming resin, wetting agent, dispersant, xerotripsis agent and appropriate solvent; Process through sand mill and high pressure homogenizer successively and obtain color slurry; Mill base adds surfactant, through solvent dilution, shears dispersion and obtain xerotripsis ink for whiteboard.

Comparative example 2:

In comparative example 2, ink for whiteboard formula and embodiment 2 are different in that addition common dispersants glyceryl stearate 2%, and preparation method is identical with embodiment 2.

Embodiment 3:

A kind of dry-erase white board ink, is made up of the raw material of following weight portion:

Pigment: white carbon black 8%, film-forming resin: hydroxymethyl cellulose 1.2%, polyvinyl butyral resin 0.5%; Wetting agent: Polyethylene Glycol 7%; Surfactant: sucrose ester 2.25%, sodium alkyl sulfate 0.75%; Dispersant: sodium pyrophosphate 2.2%; Lubricant: dibutyl ester 2%, stearic acid 1.7%; Solvent: ethanol 70%

The preparation method of above-mentioned ink for whiteboard, comprises the following steps: use high speed dispersor mixed colorant, film former, wetting agent, dispersant, xerotripsis agent and appropriate solvent; Process through sand mill and high pressure homogenizer successively and obtain color slurry; Mill base adds surfactant, through solvent dilution, shears dispersion and obtain xerotripsis ink for whiteboard.

Comparative example 3:

In comparative example 3, ink for whiteboard formula and embodiment 3 are different in that addition conventional lubricants glycerol 3%, and preparation method is identical with embodiment 3.

Ink embodiment 1, embodiment 2 and embodiment 3 prepared, is respectively charged in white board marker, chooses commercially available white board marker as a comparison case 4 simultaneously.

Prepared white board pen ink is carried out behavioral observation and test. Embodiment 1-3 and the comparative example 1-3 ink prepared will be used to pour in white board marker, writes after 5h, observe the fluency of person's handwriting, color properties, xerotripsis, stability, time of raising one's hat, the various observation of corrosivity and method of testing as follows:

(1) fluency: observe speed and the continuity of person's handwriting, the uniformity of water under nib when writing after ink fills pen.

(2) color: operational evaluation variable color gray scale, fills ink the person's handwriting color and luster that pen writes and carries out controlled observation.

(3) xerotripsis: the white board marker recorded is drawn the circle that 5 coherent diameters are �� 20mm��30mm on blank, after placing 40 days, with supporting sponge brush by normally exerting oneself on stitching, evaluates its xerotripsis according to anti-scratch number of times under room temperature.

(4) stability: operational evaluation variable color gray scale, carries out controlled observation by the color and luster that placement under the person's handwriting color and luster write on blank after filling pen and a room temperature is write after 40 days again.

(5) raising one's hat the time: when moisture preserving time measures, put into constant temperature constant humidity baking oven after being raised one's hat by finished product pen, controlling temperature is 25 DEG C, and controlling relative humidity is 60%. After a period of time take out, if color is basically unchanged, it is believed that be reached moisturizing requirement during this period of time, after the prolongation time until the time just cannot write be moisture preserving time.

(6) corrosivity: after plate topcoating ink 60 days, access panel face situation.

Concrete outcome is as shown in table 1 below:

As can be seen here, the interpolation of surfactant in ink set of the present invention, dispersant and lubricant all makes white board pen ink all get a promotion in fluency, color properties, xerotripsis, stability, corrosivity, and compared to commercial inks, ink of the present invention has the features such as strong, strong, the non-corrosiveness of high stability, moisture retention of xerotripsis.

After the foregoing that the present invention lists, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.

Claims (3)

1. a dry-erase white board board pen ink, it is characterised in that described compositions includes following component and weight content, and described weight content is in composition total weight:

Coloring agent: 2%��8%

Film-forming resin: 2%��6%

Wetting agent: 4%��10%

Surfactant: 0.6%��5%

Dispersant: 0.5%��6%

Lubricant: 1.2%��6%

Solvent: 60%��90%

Wherein, the combination of sucrose ester, sodium alkyl sulfate selected by surfactant, its weight ratio is 2.25:0.75, dispersant is phosphoric acid salt, preferred described dispersant adopts sodium tripolyphosphate, sodium pyrophosphate, sodium hexameta phosphate or its combination, lubricant is dibutyl ester, stearic acid or its combination, and film-forming resin is hydroxymethyl cellulose, polyvinyl butyral resin or its combination.

2. dry-erase white board board pen ink according to claim 1, it is characterised in that described wetting agent is Polyethylene Glycol; Described solvent is lower alcohols, it is preferred that described solvent adopts ethanol, propanol, isopropanol or its combination; Coloring agent is white carbon black.

3. the manufacture method of a dry-erase white board pen as claimed in claim 1 or 2, it is characterised in that comprise the following steps use high speed dispersor mixed colorant, film-forming resin, wetting agent, dispersant, lubricant and appropriate solvent; Process through sand mill and high pressure homogenizer successively and obtain color slurry; Mill base adds surfactant, through solvent dilution, shears dispersion and obtains xerotripsis ink for whiteboard.