CN102002285A - Super-white type teaching writing liquid - Google Patents
Super-white type teaching writing liquid Download PDFInfo
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- CN102002285A CN102002285A CN2009101872622A CN200910187262A CN102002285A CN 102002285 A CN102002285 A CN 102002285A CN 2009101872622 A CN2009101872622 A CN 2009101872622A CN 200910187262 A CN200910187262 A CN 200910187262A CN 102002285 A CN102002285 A CN 102002285A
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Abstract
The invention relates to a super-white type teaching writing liquid, belonging to a writing ink, in particular to a white teaching writing liquid which is capable of writing on a non-adsorbability teaching green plate with a smooth surface and comprises the following components by weight percent: 5-15% of film forming agent, 4-10% of lubricating releasing agent, 50-70% of cosolvent, 0.5-2% of dispersing agent, 8-15% of pigment, 7.5-14% of plasticizer and 0.5-1.5% of brightening agent. The super-white type teaching writing liquid of the invention has good stability, is easy to rub and write and has no pollution on environment, especially, the whiteness problem of the teaching writing liquid is solved by using the teaching writing liquid.
Description
Invention field
The present invention relates to a kind of writing ink, the particularly a kind of white teaching writing liquid that can on ganoid non-adsorptivity is imparted knowledge to students green plate, write.
Background technology
For a long time, our teaching appliance is continued to use blackboard and gypsum chalk mode, and chalk is cheap, easy to use because of it, have stronger practicality becomes the most frequently used educational aid of school; But the common chalk of China mostly is the individual workshop of " three do not have " and produces, they dose objectionable impuritiess such as lime powder cheap, that diminish user's health, dry powder in a large number in raw materials for production in order to maximize profit, and contain assorted too much dysgraphia, blackboard is with the plate face is dirty long afterwards, the ash white smear, the literary sketch sharpness descends, and influences vision; Particularly produce the dust that can not be absorbed by the body in a large number when writing and wipe, the severe contamination teaching environment influences the healthy of Faculty and Students, and particularly the respiratory system to the people works the mischief.
Micronic dust of Chu Xianing and dust-free chalk are substantially by dosing the production of 107 glue in recent years, though this class chalk seldom has dust from flying when writing, but when wiping, disappear because of adhesive action, can produce equally and fly upward dust in a large number. and 107 glue are to be formed by PVA, hydrochloric acid, formaldehyde and caustic soda condensation, so in 107 glue, all contain a certain amount of free formaldehyde; Some producer is in order to improve the whiteness of chalk in addition, and dose fluorescent whitening agent VBL aborning, VBL belongs to the p-diaminodiphenyl structure, what be worth notes is: free formaldehyde and p-diaminodiphenyl belong to carcinogenic substance together, if these dust that contain free formaldehyde, p-diaminodiphenyl are by in Faculty and Students' suction body, its potential harm will be very serious.
Therefore, improve the teaching environment, promote teachers and students' health and be very important; The approach of regenerating is that exsiccation is written as moist writing, and considers from the angle that replaces chalk to come into operation fully.The moist liquid lettering pen of research promotion is progressively promoted the liquid lettering pen and is write in the green writing on the blackboard of teaching.Moist liquid is write liquid as the green plate ink for writing on blackboard of teaching, can effectively avoid the chalk ash pollution classroom, avoids the infringement of chalk dust to instructor and student's health.This type of is write liquid and mainly contains two kinds, and a kind of is to be medium with organic solvent alcohol, ethyl acetate, kerosene, composite lower alcohol etc., as the disclosed liquid of writing among the CN1226587A; Another kind is then compound with lower alcohol and water to be medium, as the disclosed liquid of writing among CN145608A, the CN1165842A; With water be medium write liquid because of its poor stability, put easy layering for a long time, film forming is slower, can not promptly write promptly and wipe, and writes the back writing and easily shrinks, and causes writing unclear, can not satisfy the teaching needs, and freeze-proof is relatively poor, is not suitable for northerly winter area and stores and use.Though and at present commercially available organic solvent is writing liquid and satisfying the teaching writing requirement of medium, quality is uneven, and the viscosity high workability that has is bad, wipes the back and sticks with paste plate and also ghost is arranged; The peculiar smell that has is bigger; Especially whiteness is bad, and domestic classroom is bigger, and is long usually at 8-10 rice, and whiteness is bad to cause back row's classmate not see.
Summary of the invention
For addressing the above problem, the present invention discloses a kind of good stability, easy good, the environmentally safe of wiping property, is applicable to the white teaching writing liquid of the green plate of existing teaching, has especially solved the whiteness problem of teaching writing liquid.
Technical scheme of the present invention is: a kind of ultrawhite type teaching writing liquid is characterized in that (by weight percentage) composed of the following components:
Membrane-forming agent 5～15%
Lubricated stripper 4～10%
Solubility promoter 50～70%
Dispersion agent 0.5～2%
Pigment 8～15%
Softening agent 7.5～14%
Whitening agent 0.5～1.5%
Described membrane-forming agent is a kind of in PVB (polyvinyl butyral acetal), PVP (polyvinylpyrrolidone), the nitro-cotton;
Described lubricated stripper is a glycerine;
Described solubility promoter is a dehydrated alcohol;
Described dispersion agent is the sim alkylphenol Soxylat A 25-7;
Described pigment is the nano level titanium white;
Described softening agent is a glycerine triacetate;
Described whitening agent is a thiophene.
White pigment is preferably Dupont R-706 rutile type nano level titanium dioxide among the present invention, diameter is 0.2 micron, narrower size distribution, it is less that it diminishes glossy over dimensioning macrobead, in its production process, adopted the organism processing, can make being dispersed in the writing liquid of its densification, hiding rare is good when writing, and increases whiteness; Do surface treatment through silicon and aluminium in the titanium dioxide R-706 production process in addition, wetting effect is good, makes the writing liquid system stable, does not form concentration gradient, and the mill efficiency height is easily write.
Add whitening agent 2 among the present invention, two (5-tert-butyl-2-benzene azoles base) thiophene of 5-are called for short OB, can hide gold-tinted, and whiteness is especially good, and lasting.
The green plate of existing teaching all is that the surface is more coarse at the gypsum chalk design, and after moist liquid writing liquid was write film forming, difficulty was wiped, and the present invention has increased softening agent on prior art route system, the deliquescing of word film is easily wiped, and increases lubricated stripper the word film can be wiped.
Do not contain objectionable impuritiess such as ketone, benzene class, aromatic hydrocarbon in the organic solvent of the present invention; But selected all substances are natural degradation all, environmentally safe.
Embodiment:
Be a specific embodiment of the present invention below:
A kind of ultrawhite type teaching writing liquid, composed of the following components by weight percentage:
Polyvinyl butyral acetal (membrane-forming agent) 11.5%
Glycerine (lubricated stripper) 5.5%
Dehydrated alcohol (solubility promoter) 55.5%
Sim alkylphenol Soxylat A 25-7 (dispersion agent) 1.5%
Dupont R-706 rutile type nano level titanium dioxide (pigment) 14%
Glycerine triacetate (softening agent) 11%
2, two (5-tert-butyl-2-benzene azoles base) thiophene (whitening agent) 1% of 5-
Concrete preparation process is as follows:
The first step: will add solubility promoter--the dehydrated alcohol of 277.5kg in the electroceramics reactor, and after startup stirring, the heater switch, in still, add membrane-forming agent--the polyvinyl butyral resin of 57.5kg; Temperature is controlled at 50 ℃, 3 hours time, and allow polyvinyl butyral resin all dissolve, whipped state drops to room temperature.
Second step:--Dupont R-706 rutile type nano level titanium dioxide, 7.5kg dispersion agent--polyvinyl butyral resin solution that the sim alkylphenol Soxylat A 25-7 is made with the first step is put into high speed dispersor stirring 3 hours to take by weighing 70kg pigment, and the titanium dioxide complete wetting is disperseed.
The 3rd step: take by weighing lubricated stripper--glycerine, the 55kg softening agent--whitening agent of glycerine triacetate, 5kg--2 of 27.5kg again, the slurry that two (5-tert-butyl-2-benzene azoles base) thiophene of 5-are made with second step together grinds more than 24 hours with sand mill, filters at last and promptly gets ultrawhite type teaching writing liquid of the present invention.
Claims (8)
1. ultrawhite type teaching writing liquid is characterized in that (by weight percentage) composed of the following components:
Membrane-forming agent 5～15%
Lubricated stripper 4～10%
Solubility promoter 50～70%
Dispersion agent 0.5～2%
Pigment 8～15%
Softening agent 7.5～14%
Whitening agent 0.5～1.5%
2. the liquid of writing according to claim 1 is characterized in that described membrane-forming agent is a kind of in PVB (polyvinyl butyral acetal), PVP (polyvinylpyrrolidone), the nitro-cotton.
3. the liquid of writing according to claim 1 is characterized in that described lubricated stripper is a glycerine.
4. the liquid of writing according to claim 1 is characterized in that described solubility promoter is a dehydrated alcohol.
5. the liquid of writing according to claim 1 is characterized in that described dispersion agent is the sim alkylphenol Soxylat A 25-7.
6. the liquid of writing according to claim 1 is characterized in that described pigment is the nano grade titanium white powder.
7. the liquid of writing according to claim 1 is characterized in that described softening agent is a glycerine triacetate.
8. the liquid of writing according to claim 1 is characterized in that described whitening agent is a thiophene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101872622A CN102002285A (en) | 2009-09-02 | 2009-09-02 | Super-white type teaching writing liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101872622A CN102002285A (en) | 2009-09-02 | 2009-09-02 | Super-white type teaching writing liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102002285A true CN102002285A (en) | 2011-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101872622A Pending CN102002285A (en) | 2009-09-02 | 2009-09-02 | Super-white type teaching writing liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN102002285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907176A (en) * | 2016-05-19 | 2016-08-31 | 天津华德世纪环保科技有限公司 | Environment-friendly dustless liquid board writing fluid and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100739A (en) * | 1993-09-21 | 1995-03-29 | 石磊 | Writing ink used on blackboard and prepn. method |
| CN1129722A (en) * | 1995-02-24 | 1996-08-28 | 黄春林 | Writing liquid for teaching board |
| CN1226587A (en) * | 1998-02-18 | 1999-08-25 | 范远华 | Erasable writing liquid on yellow board for teaching |
| CN1793245A (en) * | 2004-12-21 | 2006-06-28 | 精工爱普生株式会社 | Ink composition |
-
2009
- 2009-09-02 CN CN2009101872622A patent/CN102002285A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100739A (en) * | 1993-09-21 | 1995-03-29 | 石磊 | Writing ink used on blackboard and prepn. method |
| CN1129722A (en) * | 1995-02-24 | 1996-08-28 | 黄春林 | Writing liquid for teaching board |
| CN1226587A (en) * | 1998-02-18 | 1999-08-25 | 范远华 | Erasable writing liquid on yellow board for teaching |
| CN1793245A (en) * | 2004-12-21 | 2006-06-28 | 精工爱普生株式会社 | Ink composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907176A (en) * | 2016-05-19 | 2016-08-31 | 天津华德世纪环保科技有限公司 | Environment-friendly dustless liquid board writing fluid and preparation method thereof |
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Application publication date: 20110406 |