CN105482560A - Chalk not easily subjected to dust fall - Google Patents
Chalk not easily subjected to dust fall Download PDFInfo
- Publication number
- CN105482560A CN105482560A CN201511011760.3A CN201511011760A CN105482560A CN 105482560 A CN105482560 A CN 105482560A CN 201511011760 A CN201511011760 A CN 201511011760A CN 105482560 A CN105482560 A CN 105482560A
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- CN
- China
- Prior art keywords
- parts
- chalk
- modified landplaster
- autoclave
- dry linting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C09D13/00—Pencil-leads; Crayon compositions; Chalk compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Cosmetics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses a chalk not easily subjected to dust fall. The chalk comprises the following raw materials in parts by weight: 50-90 parts of modified gypsum powder, 15-45 parts of calcium carbonate, 10-20 parts of magnesium carbonate, 5-10 parts of kaolin, 1.5-2.5 parts of acid dye, 1-2 parts of lemon oil and 120-200 parts of water. A preparation method of the modified gypsum powder comprises the following steps: sending gypsum powder and nano-titanium dioxide to an autoclave to undergo thermal insulation, taking out the gypsum powder and nano-titanium dioxide to be dried, adding vinyltriisopropoxysilane and deionized water, stirring the materials at a speed of 2000-3000r/min, adding sodium lauryl sulfate and an ethanol solution and carrying out ultrasonic dispersion, filtration, washing, drying and grinding, thus obtaining the modified gypsum powder, wherein the temperature and pressure of steam in the autoclave are respectively 120-160 DEG C and 0.8-1.4MPa. The chalk is not easily subjected to dust fall, has small specific gravity, is convenient to use, is firm and durable, does not contain organic solvents and is harmless to the environment and human health.
Description
Technical field
The present invention relates to chalk technical field, particularly relate to one not easily dry linting chalk.
Background technology
Dust-free chalk belongs to the improvement product of common chalk, refers to pollute at elimination classroom chalk dust, and it just in common chalk, adds lipid or polyalcohols material makes binding agent, add the filler that proportion is larger again, as clay, muddy limestone, cement etc., the proportion of chalk dust is increased, writes effort, although the water-soluble chalk occurred in addition, airborne dust is little, but containing a large amount of organic solvent, has certain harm to environmental and human health impacts, and writing not fugitive color, be difficult to erasing.
Summary of the invention
The present invention proposes one not easily dry linting chalk, not easily dry linting, proportion is little, writes conveniently, durable, not containing organic solvent, harmless to environmental and human health impacts.
The one not easily dry linting chalk that the present invention proposes, its raw material comprises by weight: modified landplaster 50 ~ 90 parts, 15 ~ 45 parts, calcium carbonate, 10 ~ 20 parts, magnesiumcarbonate, kaolin 5 ~ 10 parts, matching stain 1.5 ~ 2.5 parts, lemon oil 1 ~ 2 part, 120 ~ 200 parts, water.
Preferably, modified landplaster particle diameter is 10 ~ 200 microns.
Preferably, the weight ratio of modified landplaster, calcium carbonate is 70 ~ 85:20 ~ 36.
Preferably, modified landplaster, kaolinic weight ratio are 70 ~ 85:6 ~ 8.
Preferably, calcium carbonate, magnesiumcarbonate, kaolinic weight ratio are 20 ~ 36:12 ~ 15:6 ~ 8.
Preferably, described not easily dry linting chalk, its raw material comprises by weight: modified landplaster 70 ~ 85 parts, 20 ~ 36 parts, calcium carbonate, 12 ~ 15 parts, magnesiumcarbonate, kaolin 6 ~ 8 parts, matching stain 2 ~ 2.3 parts, lemon oil 1.2 ~ 1.8 parts, 150 ~ 180 parts, water.
Preferably, the preparation method of modified landplaster is as follows: terra alba, nano titanium oxide are delivered in autoclave and be incubated, and wherein in autoclave, vapor temperature is 120 ~ 160 DEG C, vapor pressure is 0.8 ~ 1.4MPa, take out dry, add vinyl silane triisopropoxide, deionized water and stirring, stirring velocity is 2000 ~ 3000r/min, add sodium laurylsulfate, ethanolic soln carries out ultrasonic disperse, filter, washing, dry, pulverize, obtain modified landplaster.
Preferably, the preparation method of modified landplaster is as follows: take 40 ~ 65 parts of terra albas by weight, 25 ~ 30 parts of nano titanium oxides are delivered in autoclave and are incubated 40 ~ 60min, wherein in autoclave, vapor temperature is 120 ~ 160 DEG C, vapor pressure is 0.8 ~ 1.4MPa, take out dry, add 2 ~ 2.8 parts of vinyl silane triisopropoxides, 80 ~ 120 parts of deionized water and stirring, stirring velocity is 2000 ~ 3000r/min, whipping temp is 85 ~ 95 DEG C, add 0.5 ~ 1.5 part of sodium laurylsulfate, 80 ~ 120 parts of massfractions are that 45 ~ 65wt% ethanolic soln carries out ultrasonic disperse, ultrasonic temperature is 75 ~ 86 DEG C, ultrasonic time is 5 ~ 9min, filter, washing, dry, pulverize, obtain modified landplaster.
Preferably, in the preparation method of modified landplaster, the weight ratio of terra alba, nano titanium oxide, vinyl silane triisopropoxide, sodium laurylsulfate is 45 ~ 62:26 ~ 28:2.2 ~ 2.5:0.5 ~ 1.5.
Preferably, in the preparation method of modified landplaster, in autoclave, vapor temperature is 130 ~ 150 DEG C, and vapor pressure is 0.9 ~ 1.3MPa; Ultrasonic temperature is 76 ~ 84 DEG C, and ultrasonic time is 6 ~ 8min.
Above-mentioned not easily dry linting chalk adopts following technique to prepare: water, lemon oil are mixed by proportioning, be heated to 120 DEG C, add calcium carbonate, magnesiumcarbonate, kaolin is uniformly mixed, add matching stain to mix, finally add modified landplaster and mix rear injection mould, cooling, takes out and obtains not easily dry linting chalk.
In the preparation method of modified landplaster, by terra alba, nano titanium oxide after treatment, surface irregularity, adsorptivity are strong, the present invention adopts modified landplaster and calcium carbonate, magnesiumcarbonate, kaolin cooperatively interacts, not only mixing uniformity is good, even if do not add lipid or polyalcohols material makes binding agent, mutual combination, adsorptive power is still very strong, wherein kaolin is laminate structure, in soft earthy, not only can enhancing modified terra alba and calcium carbonate, the cohesive force of magnesiumcarbonate, and relatively can reduce product weight, with lemon oil mating reaction, under flavouring prerequisite, gained chalk is made to have the writing effect of similar wax crayon, writing is easily wiped, overcome the shortcoming of traditional chalk, not containing organic solvent, harmless to environmental and human health impacts, gained modified landplaster of the present invention not only not easily produces minute dusts, and not easily dry linting, and proportion is little, writes conveniently, durable.
Embodiment
Embodiment 1
One is dry linting chalk not easily, and its raw material comprises by weight: modified landplaster 50 parts, carbonic acid Ca45 part, 10 parts, magnesiumcarbonate, kaolin 10 parts, matching stain 1.5 parts, lemon oil 2 parts, 120 parts, water.
Embodiment 2
One is dry linting chalk not easily, and its raw material comprises by weight: modified landplaster 90 parts, 15 parts, calcium carbonate, 20 parts, magnesiumcarbonate, kaolin 5 parts, matching stain 2.5 parts, lemon oil 1 part, 200 parts, water.
Embodiment 3
One is dry linting chalk not easily, and its raw material comprises by weight: modified landplaster 70 parts, 36 parts, calcium carbonate, 12 parts, magnesiumcarbonate, kaolin 8 parts, matching stain 2 parts, lemon oil 1.8 parts, 150 parts, water.
The preparation method of modified landplaster is as follows: take 65 parts of terra albas by weight, 25 parts of nano titanium oxides are delivered in autoclave and are incubated 60min, wherein in autoclave, vapor temperature is 120 DEG C, vapor pressure is 1.4MPa, take out dry, add 2 parts of vinyl silane triisopropoxides, 120 parts of deionized water and stirring, stirring velocity is 2000r/min, whipping temp is 95 DEG C, add 0.5 part of sodium laurylsulfate, 120 parts of massfractions are that 45wt% ethanolic soln carries out ultrasonic disperse, ultrasonic temperature is 86 DEG C, ultrasonic time is 5min, filter, washing, dry, pulverize, obtain modified landplaster.
Embodiment 4
One is dry linting chalk not easily, and its raw material comprises by weight: modified landplaster 85 parts, 20 parts, calcium carbonate, 15 parts, magnesiumcarbonate, kaolin 6 parts, matching stain 2.3 parts, lemon oil 1.2 parts, 180 parts, water.
The preparation method of modified landplaster is as follows: take 40 parts of terra albas by weight, 30 parts of nano titanium oxides are delivered in autoclave and are incubated 40min, wherein in autoclave, vapor temperature is 160 DEG C, vapor pressure is 0.8MPa, take out dry, add 2.8 parts of vinyl silane triisopropoxides, 80 parts of deionized water and stirring, stirring velocity is 3000r/min, whipping temp is 85 DEG C, add 1.5 parts of sodium laurylsulfates, 80 parts of massfractions are that 65wt% ethanolic soln carries out ultrasonic disperse, ultrasonic temperature is 75 DEG C, ultrasonic time is 9min, filter, washing, dry, pulverize, obtain modified landplaster.
Embodiment 5
One is dry linting chalk not easily, and its raw material comprises by weight: modified landplaster 78 parts, 28 parts, calcium carbonate, 13 parts, magnesiumcarbonate, kaolin 7 parts, matching stain 2.1 parts, lemon oil 1.5 parts, 170 parts, water.
The preparation method of modified landplaster is as follows: take 55 parts of terra albas by weight, 27 parts of nano titanium oxides are delivered in autoclave and are incubated 50min, wherein in autoclave, vapor temperature is 140 DEG C, vapor pressure is 1.2MPa, take out dry, add 2.4 parts of vinyl silane triisopropoxides, 100 parts of deionized water and stirring, stirring velocity is 2500r/min, whipping temp is 90 DEG C, add 1 part of sodium laurylsulfate, 100 parts of massfractions are that 55wt% ethanolic soln carries out ultrasonic disperse, ultrasonic temperature is 80 DEG C, ultrasonic time is 7min, filter, washing, dry, pulverize, obtain modified landplaster.
Described in embodiment 1 ~ 5, not easily dry linting chalk adopts following technique to prepare: water, lemon oil are mixed by proportioning, be heated to 120 DEG C, add calcium carbonate, magnesiumcarbonate, kaolin is uniformly mixed, add matching stain to mix, finally add modified landplaster and mix rear injection mould, cooling, takes out and obtains not easily dry linting chalk.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a not easily dry linting chalk, it is characterized in that, its raw material comprises by weight: modified landplaster 50 ~ 90 parts, 15 ~ 45 parts, calcium carbonate, 10 ~ 20 parts, magnesiumcarbonate, kaolin 5 ~ 10 parts, matching stain 1.5 ~ 2.5 parts, lemon oil 1 ~ 2 part, 120 ~ 200 parts, water.
2. not easily dry linting chalk according to claim 1, is characterized in that, modified landplaster particle diameter is 10 ~ 200 microns.
3. not easily dry linting chalk according to claim 1, is characterized in that, the weight ratio of modified landplaster, calcium carbonate is 70 ~ 85:20 ~ 36.
4. not easily dry linting chalk according to claim 1, is characterized in that, modified landplaster, kaolinic weight ratio are 70 ~ 85:6 ~ 8.
5. not easily dry linting chalk according to claim 1, is characterized in that, calcium carbonate, magnesiumcarbonate, kaolinic weight ratio are 20 ~ 36:12 ~ 15:6 ~ 8.
6. the not easily dry linting chalk according to any one of claim 1-5, it is characterized in that, its raw material comprises by weight: modified landplaster 70 ~ 85 parts, 20 ~ 36 parts, calcium carbonate, 12 ~ 15 parts, magnesiumcarbonate, kaolin 6 ~ 8 parts, matching stain 2 ~ 2.3 parts, lemon oil 1.2 ~ 1.8 parts, 150 ~ 180 parts, water.
7. the not easily dry linting chalk according to any one of claim 1-6, it is characterized in that, the preparation method of modified landplaster is as follows: terra alba, nano titanium oxide are delivered in autoclave and be incubated, wherein in autoclave, vapor temperature is 120 ~ 160 DEG C, vapor pressure is 0.8 ~ 1.4MPa, take out dry, add vinyl silane triisopropoxide, deionized water and stirring, stirring velocity is 2000 ~ 3000r/min, adds sodium laurylsulfate, ethanolic soln carries out ultrasonic disperse, filters, washing, dry, pulverize, obtain modified landplaster.
8. the not easily dry linting chalk according to any one of claim 1-7, it is characterized in that, the preparation method of modified landplaster is as follows: take 40 ~ 65 parts of terra albas by weight, 25 ~ 30 parts of nano titanium oxides are delivered in autoclave and are incubated 40 ~ 60min, wherein in autoclave, vapor temperature is 120 ~ 160 DEG C, vapor pressure is 0.8 ~ 1.4MPa, take out dry, add 2 ~ 2.8 parts of vinyl silane triisopropoxides, 80 ~ 120 parts of deionized water and stirring, stirring velocity is 2000 ~ 3000r/min, whipping temp is 85 ~ 95 DEG C, add 0.5 ~ 1.5 part of sodium laurylsulfate, 80 ~ 120 parts of massfractions are that 45 ~ 65wt% ethanolic soln carries out ultrasonic disperse, ultrasonic temperature is 75 ~ 86 DEG C, ultrasonic time is 5 ~ 9min, filter, washing, dry, pulverize, obtain modified landplaster.
9. the not easily dry linting chalk according to any one of claim 1-8, it is characterized in that, in the preparation method of modified landplaster, the weight ratio of terra alba, nano titanium oxide, vinyl silane triisopropoxide, sodium laurylsulfate is 45 ~ 62:26 ~ 28:2.2 ~ 2.5:0.5 ~ 1.5.
10. the not easily dry linting chalk according to any one of claim 1-9, is characterized in that, in the preparation method of modified landplaster, in autoclave, vapor temperature is 130 ~ 150 DEG C, and vapor pressure is 0.9 ~ 1.3MPa; Ultrasonic temperature is 76 ~ 84 DEG C, and ultrasonic time is 6 ~ 8min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511011760.3A CN105482560A (en) | 2015-12-30 | 2015-12-30 | Chalk not easily subjected to dust fall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511011760.3A CN105482560A (en) | 2015-12-30 | 2015-12-30 | Chalk not easily subjected to dust fall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105482560A true CN105482560A (en) | 2016-04-13 |
Family
ID=55669846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511011760.3A Pending CN105482560A (en) | 2015-12-30 | 2015-12-30 | Chalk not easily subjected to dust fall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105482560A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1628992A (en) * | 2003-12-18 | 2005-06-22 | 唐春芳 | Black pencil |
| CN101085584A (en) * | 2006-06-08 | 2007-12-12 | 李树本 | Environmental protection chalk |
| CN101311337A (en) * | 2008-04-25 | 2008-11-26 | 东北大学 | Process for preparing calcium sulphate whiskers by using flue gas desulfurization gypsum |
| WO2011141936A1 (en) * | 2010-05-13 | 2011-11-17 | Kores (India) Limited | A novel dustless chalk and process of making the same |
| CN102911560A (en) * | 2012-11-12 | 2013-02-06 | 山西大学 | Dustless colored chalk dedicated for whiteboard capable of fading chemically |
-
2015
- 2015-12-30 CN CN201511011760.3A patent/CN105482560A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1628992A (en) * | 2003-12-18 | 2005-06-22 | 唐春芳 | Black pencil |
| CN101085584A (en) * | 2006-06-08 | 2007-12-12 | 李树本 | Environmental protection chalk |
| CN101311337A (en) * | 2008-04-25 | 2008-11-26 | 东北大学 | Process for preparing calcium sulphate whiskers by using flue gas desulfurization gypsum |
| CN101311337B (en) * | 2008-04-25 | 2010-06-16 | 东北大学 | Process for preparing calcium sulphate whiskers by using flue gas desulfurization gypsum |
| WO2011141936A1 (en) * | 2010-05-13 | 2011-11-17 | Kores (India) Limited | A novel dustless chalk and process of making the same |
| CN102911560A (en) * | 2012-11-12 | 2013-02-06 | 山西大学 | Dustless colored chalk dedicated for whiteboard capable of fading chemically |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |