CN106671249A - Preparation method of acrylic acid in-situ polymerization modified plaster mould - Google Patents
Preparation method of acrylic acid in-situ polymerization modified plaster mould Download PDFInfo
- Publication number
- CN106671249A CN106671249A CN201510763176.7A CN201510763176A CN106671249A CN 106671249 A CN106671249 A CN 106671249A CN 201510763176 A CN201510763176 A CN 201510763176A CN 106671249 A CN106671249 A CN 106671249A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- plaster
- acrylic acid
- mould
- stand
- Prior art date
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
- B28B1/262—Mould materials; Manufacture of moulds or parts thereof
- B28B1/264—Plaster
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
Abstract
The invention relates to a preparation method of an acrylic acid in-situ polymerization modified plaster mould, and belongs to the field of plaster mould materials. The plaster mould is prepared from plaster materials of alpha plaster and beta plaster. Acrylic acid is used as an in-situ polymerization modifier, and the additive amount of the acrylic acid is 10wt% to 15wt%. The preparation method comprises the following steps of: respectively weighing a certain amount of the alpha plaster and a certain amount of the beta plaster in a mass ratio of the alpha plaster to the beta plaster being 1 to 1 for stand-by application; weighing acrylic acid monomers according to the mass being 10wt%-15wt% of the total mass of the alpha plaster and the beta plaster for stand-by application; weighing potassium persulfate according to the mass being 3wt% of the mass of the acrylic acid monomers for stand-by application; weighing a certain amount of water according to the mass being 160wt% of the total mass of the alpha plaster and the beta plaster, and pouring the weighed water into a beaker for stand-by application; dissolving the weighed stand-by application potassium persulfate in the weighed stand-by application water, and performing stirring for 3-5 minutes to obtain a solution A; pouring the solution A into the weighed stand-by application acrylic acid monomers, and performing stirring for 3-5 minutes to obtain a solution B; adding the weighed stand-by application alpha plaster and the weighed stand-by application beta plaster in the solution B, and performing stirring for 5 minutes to obtain a solution C; pouring the solution C in a mould; maintaining the mould for 1 hour, and performing demoulding to obtain a plaster mould; and putting the plaster mould in the environment where the temperature constantly keeps 40 DEG C and the relative humidity constantly keeps 90%rh for maintaining for 48 hours to obtain the acrylic acid in-situ polymerization modified plaster mould. The acrylic acid in-situ polymerization modified plaster mould prepared by the preparation method disclosed by the invention can be used as a ceramic slip casting mould, and the preparation method of the acrylic acid in-situ polymerization modified plaster mould has important significance in prolonging the service life of the mould, improving ceramic slip casting efficiency and the like.
Description
Technical field
The invention belongs to gypsum mold material production field, and in particular to a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould.
Technical background
Gypsum mold be it is long-term in Ceramic production since the traditional moulds that use, because its cost of manufacture is cheap, aboundresources, environmental protection, water absorption rate it is high, into mould plasticity it is good, corner angle are clearly demarcated the advantages of have been widely used in ceramic grout moulding process.
But as ceramic industry is progressively to mechanization and the development in automated production direction, gypsum mold low intensity, service life are short, ropy deadly defect day sends out protrusion, the limitation that gypsum material itself is present, has constrained Production of Ceramics and has developed to high-quality, efficient direction.
The content of the invention
It is an object of the invention in pin Production of Ceramics, the shortcomings of gypsum mold hardness is low, service life is short, and a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould is provided.
Technical scheme is with technical characteristic：
With α-gypsum and β-gypsum as modified object, by α-gypsum quality：It is stand-by that β-gypsum quality respectively weighs 50g for 1: 1, it is stand-by 10～15g acrylic monomers to be weighed by the 10wt%～15wt% of α-gypsum and β-gypsum gross mass, it is stand-by 0.3～0.45g potassium peroxydisulfates to be weighed by the 3wt% of acrylic monomers quality, by the 160wt% of α-gypsum and β-gypsum gross mass weigh 160g water be put into it is stand-by in beaker, stand-by potassium peroxydisulfate will be weighed it is dissolved in and weighs in stand-by water, stirring 3-5min, pour into again and weighed stand-by acrylic monomers, after stirring 3-5min, addition has weighed stand-by α-gypsum and β-gypsum, after being stirred for 5min, in pouring mould into, the demoulding after 1h, temperature is put into for 40 DEG C, after relative humidity is for maintenance 48h in the constant temperature and humidity maintenance of 90%rh, obtain acrylic acid in-situ polymerization modified gypsum mould.
α used-gypsum fineness is the mesh of 120 mesh -180.
β used-gypsum fineness is 80 mesh～90 mesh.
Acrylic monomers purity used is 99.9%.
Potassium peroxydisulfate purity used is 99.5%.
Water used is city domestic water, is met《Water for city's residential use amount standard》, numbering is：GB/T50331-2002.
The acrylic acid in-situ polymerization modified gypsum compression strength for being obtained reaches 11.3 × 106N/m2～14.3 × 106N/m2, rupture strength reaches 4.5 × 106N/m2～6.7 × 106N/m2, case hardness is 38HV～43HV.
Specific embodiment
Embodiment 1
By α-gypsum quality：It is stand-by that β-gypsum quality respectively weighs 50g for 1: 1, it is stand-by 12g acrylic monomers to be weighed by the 12wt% of α-gypsum and β-gypsum gross mass, it is stand-by 0.36g potassium peroxydisulfates to be weighed by the 3wt% of acrylic monomers quality, by the 160wt% of α-gypsum and β-gypsum gross mass weigh 160g water be put into it is stand-by in beaker, stand-by potassium peroxydisulfate will be weighed it is dissolved in and weighs in stand-by water, stirring 3-5min, pour into again and weighed stand-by acrylic monomers, after stirring 3-5min, addition has weighed stand-by α-gypsum and β-gypsum, after being stirred for 5min, in pouring mould into, the demoulding after 1h, temperature is put into for 40 DEG C, after relative humidity is for maintenance 48h in the constant temperature and humidity maintenance of 90%rh, obtain acrylic acid in-situ polymerization modified gypsum mould.
The acrylic acid in-situ polymerization modified gypsum mould, scanned Electronic Speculum and projection electronic microscope photos, its microstructure is：α-gypsum forms three-dimensional pore space skeleton structure with β-gypsum, and acrylic monomers is in its three-dimensional pore space situ polymerization.The test of Jing rupture strengths, compression strength and case hardness, as a result shows that acrylic acid in-situ polymerization modified gypsum compression strength reaches 12.6 × 106N/m2, its compression strength is compared with common gypsum mould and improves 32%, and rupture strength reaches 5.2 × 106N/m2, its rupture strength is compared with common gypsum mould and improves 37%, and case hardness is 41HV, its surface strength is compared with common gypsum mould and improves 23%.
Embodiment 2
By α-gypsum quality：It is stand-by that β-gypsum quality respectively weighs 50g for 1: 1, it is stand-by 15g acrylic monomers to be weighed by the 15wt% of α-gypsum and β-gypsum gross mass, it is stand-by 0.45g potassium peroxydisulfates to be weighed by the 3wt% of acrylic monomers quality, by the 160wt% of α-gypsum and β-gypsum gross mass weigh 160g water be put into it is stand-by in beaker, stand-by potassium peroxydisulfate will be weighed it is dissolved in and weighs in stand-by water, stirring 3-5min, pour into again and weighed stand-by acrylic monomers, after stirring 3-5min, addition has weighed stand-by α-gypsum and β-gypsum, after being stirred for 5min, in pouring mould into, the demoulding after 1h, temperature is put into for 40 DEG C, after relative humidity is for maintenance 48h in the constant temperature and humidity maintenance of 90%rh, obtain acrylic acid in-situ polymerization modified gypsum mould.
The acrylic acid in-situ polymerization modified gypsum mould, uses on automatic production line, and it is recycled, and number of times is more than more than 350 times and surface is still smooth；For common pressure grouting modified gypsum mould can access times be 137 times, its service life compared with common gypsum mould improve 67%.
Claims (8)
1. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould, it is characterised in that with mineral composition as α-gypsum and β-gypsum be modified
Object, with acrylic acid as modifying agent, the preparation method of the acrylic acid in-situ polymerization modified gypsum mould is comprised the following steps：Raw material is weighed, mixing is stirred
Mix, shaping and demoulding, maintenance.
2. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould as claimed in claim 1, it is characterised in that gypsum used is α-stone
Two kinds of cream and β-gypsum, α used-gypsum fineness is the mesh of 120 mesh -180, and β used-gypsum fineness is 80 mesh～90 mesh.
3. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould as claimed in claim 1, it is characterised in that acrylic monomers used
It is 99.9% that its purity is purity, and addition is the 10wt%～15wt% of gypsum quality.
4. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould as claimed in claim 1, it is characterised in that potassium sulfate purity used
For 99.5%, addition for acrylic monomers quality 3wt%.
5. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould as claimed in claim 1, it is characterised in that it is gypsum that raw material is weighed
By α-gypsum quality：β-gypsum quality is weighed for 1: 1, and acrylic monomers monomer mass presses 10wt%～15 of α-gypsum and β-gypsum gross mass
Wt% is weighed, and potassium peroxydisulfate is weighed by the 3wt% of acrylic monomers quality, and water by the 160wt% of α-gypsum and β-gypsum gross mass by being weighed.
6. a kind of preparation method of acrylic acid in-situ polymerization modified gypsum mould as claimed in claim 1, it is characterised in that mixing is to weigh
Stand-by potassium peroxydisulfate is dissolved in and weighing in stand-by water, stirs 3-5min, then pours oneself into and weighs stand-by acrylic monomers, stirring 3-5min it
Afterwards, add and weighed stand-by α-gypsum and β-gypsum, be stirred for 5min.
7. the method that a kind of polar polymer intercalation as claimed in claim 1 prepares tubulose clay, it is characterised in that shaping and demoulding is to stir mixing
Slurry after mixing pours die for molding into, the demoulding after 1h.
8. the method that a kind of polar polymer intercalation as claimed in claim 1 prepares tubulose clay, it is characterised in that maintenance is after shaping and demoulding
Base substrate is put into temperature for 40 DEG C, and relative humidity obtains compression strength and reach 11.3 × 10 to conserve after 48h in the constant temperature and humidity maintenance of 90%rh6
N/m2～14.3 × 106N/m2, rupture strength reaches 4.5 × 106N/m2～6.7 × 106N/m2, case hardness is 38HV～43HV acrylic acid
In-situ polymerization modified gypsum mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510763176.7A CN106671249A (en) | 2015-11-11 | 2015-11-11 | Preparation method of acrylic acid in-situ polymerization modified plaster mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510763176.7A CN106671249A (en) | 2015-11-11 | 2015-11-11 | Preparation method of acrylic acid in-situ polymerization modified plaster mould |
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| Publication Number | Publication Date |
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| CN106671249A true CN106671249A (en) | 2017-05-17 |
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| CN201510763176.7A Pending CN106671249A (en) | 2015-11-11 | 2015-11-11 | Preparation method of acrylic acid in-situ polymerization modified plaster mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023229996A1 (en) * | 2022-05-27 | 2023-11-30 | United States Gypsum Company | Pottery plaster formula with increased porosity |
Citations (6)
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|---|---|---|---|---|
| WO2012116228A2 (en) * | 2011-02-23 | 2012-08-30 | National Gypsum Properties, Llc | Improved gypsum wallboard slurry and method for making the same |
| CN102211346B (en) * | 2011-06-08 | 2012-09-19 | 浙江大学 | Method for preparing functionally graded material through pressure filtration forming in motional magnetic field |
| CN102718461A (en) * | 2012-06-29 | 2012-10-10 | 景德镇陶瓷学院 | Molding process method for preparing gypsum mold by hydrothermal method and product prepared by using method |
| CN103086738A (en) * | 2011-10-27 | 2013-05-08 | 比亚迪股份有限公司 | Preparation method for gypsum mold raw materials and gypsum mold |
| CN104193285A (en) * | 2014-08-27 | 2014-12-10 | 安徽锦洋氟化学有限公司 | High-performance modified fluorogypsum |
| CN104725002A (en) * | 2013-12-19 | 2015-06-24 | 江南大学 | Method for using high alcoholysis degree polyvinyl acetate modified beta gypsum to manufacture ceramic tableware mold |
-
2015
- 2015-11-11 CN CN201510763176.7A patent/CN106671249A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012116228A2 (en) * | 2011-02-23 | 2012-08-30 | National Gypsum Properties, Llc | Improved gypsum wallboard slurry and method for making the same |
| CN102211346B (en) * | 2011-06-08 | 2012-09-19 | 浙江大学 | Method for preparing functionally graded material through pressure filtration forming in motional magnetic field |
| CN103086738A (en) * | 2011-10-27 | 2013-05-08 | 比亚迪股份有限公司 | Preparation method for gypsum mold raw materials and gypsum mold |
| CN102718461A (en) * | 2012-06-29 | 2012-10-10 | 景德镇陶瓷学院 | Molding process method for preparing gypsum mold by hydrothermal method and product prepared by using method |
| CN104725002A (en) * | 2013-12-19 | 2015-06-24 | 江南大学 | Method for using high alcoholysis degree polyvinyl acetate modified beta gypsum to manufacture ceramic tableware mold |
| CN104193285A (en) * | 2014-08-27 | 2014-12-10 | 安徽锦洋氟化学有限公司 | High-performance modified fluorogypsum |
Non-Patent Citations (1)
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| 毛玉成: "聚羧酸大分子的合成及其在模具石膏中的应用", 《江南大学硕士学位论文》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023229996A1 (en) * | 2022-05-27 | 2023-11-30 | United States Gypsum Company | Pottery plaster formula with increased porosity |
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Application publication date: 20170517 |