CN105016646A - Gypsum admixture for polycarboxylic ceramic dies for compounding arylsulphobetaine - Google Patents
Gypsum admixture for polycarboxylic ceramic dies for compounding arylsulphobetaine Download PDFInfo
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- CN105016646A CN105016646A CN201410164510.2A CN201410164510A CN105016646A CN 105016646 A CN105016646 A CN 105016646A CN 201410164510 A CN201410164510 A CN 201410164510A CN 105016646 A CN105016646 A CN 105016646A
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Abstract
The invention discloses a gypsum admixture for polycarboxylic ceramic dies for compounding arylsulphobetaine. The arylsulphobetaine can be combined with Ca<2+>, so that a hydration process can be accelerated to a certain extent, thereby slowing down the delayed coagulation of a polycarboxylic macromolecular admixture. By adding a small amount of arylsulphobetaine into the polycarboxylic macromolecular admixture, a gypsum admixture for polycarboxylic ceramic dies, which can reduce the water-gypsum ratio, and does not reduce the water imbibition of gypsum on the premise of enhancing the strength of gypsum for ceramic dies, can be obtained. After the gypsum admixture is added into beta-hemihydrate gypsum, the water-gypsum ratio can be reduced, thereby facilitating the improvement of the strength of ceramic gypsum dies, and then facilitating the improvement of the number of use and production efficiency of dies for ceramic production.
Description
[technical field]
The present invention relates to a kind of polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, belong to domestic ceramics technical field.
[background technology]
During owing to preparing gypsum pottery mould, actual used water amount is far longer than theoretical aquation water requirement, and cause that gypsum mold intensity is low, cracky, of poor quality, work-ing life this fatal weakness short more and more outstanding.On the other hand, along with ceramic industry is progressively to the development of automatic and mechanical production mode reform, the domestic demand to gypsum mold gets more and more, and specification of quality is also higher.
For these problems, mainly contain three kinds of methods at present to improve the performance of gypsum mold, first method be by alpha-semi water plaster stone and β-semi-hydrated gypsum used in combination by a certain percentage, meanwhile, add hybrid technique, also stricter to the control of quality, thus add cost; The second is by reducing the method for water paste ratio to obtain the gypsum mold of high strength, but can reduce the water-intake rate of gypsum mold, then has influence on production efficiency; Another kind method is then improve the intensity of gypsum mold by adding admixture.By contrast, additive can improve the performance of gypsum material significantly in minimum volume situation, has certain advantage.
At present, although have a lot of poly carboxylic acid macromole additive application in ceramic gypsum mold, but the water reducing and strength-increasing effect of traditional additive is used for effect in gypsum and bad, even can reduce gypsum intensity, and most poly carboxylic acid macromole due to its retarding effect serious, often adverse influence is caused to the physical strength of gypsum.Therefore, single poly carboxylic acid macromole additive often can not meet actual production demand.The research of B ü lichen etc. shows
1, SO
4 2-and there is competitive adsorption between poly carboxylic acid macromole, in gypsum hydration process, serve the effect of accelerator.Given this, consider fragrant sultaine (dodecyl dimethyl benzyl sultaine), there is super interfacial tension, and containing SO in molecular structure
4 2-but its poorly water-soluble, and sodium alkyl benzene sulfonate has good solubilizing effect, and especially easily and other materials produce and act synergistically, thus the water-soluble of fragrant sultaine can be increased with sodium alkyl benzene sulfonate, it is also normal carries out composite use with other material, and sodium alkyl benzene sulfonate, easy and Ca
2+in conjunction with generation alkyl benzene calcium sulfonate insolubles, play certain nucleation, thus be conducive to the growth of gypsum crystal, accelerate gypsum hydration process.This prompting sodium alkyl benzene sulfonate and fragrant sultaine add the disadvantageous effect that likely can reduce and be caused intensity by the delayed coagulation of poly carboxylic acid macromole, even strengthen the intensity of gypsum mold.Therefore, if can by with poly carboxylic acid macromole and sodium alkyl benzene sulfonate composite come modification β-semi-hydrated gypsum, improve gypsum intensity not reducing under the prerequisite that β-semi-hydrated gypsum water-absorbent or reduction degree can tolerate, that is by raising ceramic die access times and reduce α, β technology for premixing, reduce production cost.In addition, although β-semi-hydrated gypsum water-absorbent is good, required water paste ratio is more than 0.70, and mould strength is low; And the macromolecular water-reduction of poly carboxylic acid can alleviate this defect.
The present invention relates to a kind of polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, wherein poly carboxylic acid macromole due to water-reducing effect good, water paste ratio can be reduced, fragrant sultaine and sodium alkyl benzene sulfonate are then slow down the disadvantageous effect that the delayed coagulation of poly carboxylic acid macromole brings, accelerate hydration process, thus improve the intensity of mould gypsum.After in a small amount of poly carboxylic acid macromole and fragrant sultaine and the sodium alkyl benzene sulfonate composite β of adding to-semi-hydrated gypsum, also can substitute traditional α, β mixed gypsum used, reduce costs; While not obvious reduction even improves the good water absorbing properties of β-semi-hydrated gypsum, also improve crockery mould gypsum intensity, improve crockery mold use efficiency, reduce water paste ratio and production cost.
[summary of the invention]
[technical problem that will solve]
The object of this invention is to provide a kind of polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, the method is raw materials used to be easy to get, and technique is simple, easy to operate.
[technical scheme]
The present invention is achieved through the following technical solutions: by the polycarboxylic acid series ceramic die gypsum admixture of a certain amount of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for the 1%-6% of total volume, virtue sultaine accounts for the 5%-15% of total volume, all the other are macromole poly carboxylic acid) with the 0.05%-0.2% of gypsum quality (preferred 0.1%-0.15%), add in water needed for mold and be mixed with solution, water requirement is with water paste ratio (recommendation 0.60-0.75, those skilled in the art can be determined voluntarily by the technical characteristic of follow-up ceramic material) calculate.This solution is added in β-semi-hydrated gypsum under slow stirring in 2-3min, gypsum pottery mould test specimen is made again after placing 1-3min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C after maintenance 40-48 hour (be 15%-20% to water content), for mud material forming, can test ceramic die access times (being no more than 2mm with die edge distortion to be limited) simultaneously; The pug shaping forming time of ceramic die is 10-15 minute.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Those skilled in the art can regulate the shaping forming time voluntarily according to the feature of ceramic material used.
Gypsum test piece intensity measures with reference to GBT1640-1992, ceramic die terra alba quantitative measurement method
2, being determined as follows of water-intake rate: weigh another half block gypsum test specimen remaining after having surveyed folding strength (M
1), then be submerged into (water surface about exceeds gypsum test specimen upper end about 2cm) in water, place 10min (this area section meter personnel can be adjusted according to the actual base time), take out, wipe the unnecessary water of surface of test piece away with wet rag, weigh (M
2) and calculate water-intake rate.Calculation formula is as follows:
Poly carboxylic acid macromole of the present invention, can be obtained by following technological method: with methylpropene sodium sulfonate, methyl thiazolinyl polyoxyethylene poly-oxygen propylene aether, N hydroxymethyl acrylamide for monomer, take ammonium persulphate as initiator, carry out aqueous phase free radical reaction 8h at 80 DEG C after, be warming up to 90 DEG C, aging 1h, can terminate reaction.Being neutralized to pH with the NaOH that massfraction is 30% is after cooling 7, and its structure is as shown in the formula 1.Wherein three kinds of monomer mole ratios are 20: 8: 5, and initiator amount is 0.9%, and methylpropene sodium sulfonate can replace to sodium allylsulfonate, and the replaceable one-tenth Sodium Persulfate of initiator or Potassium Persulphate, the product solid content after synthesis is about 40%.
Fragrant sultaine of the present invention is dodecyl dimethyl benzyl sultaine, and concrete molecular structural formula is as follows:
The polycarboxylic acid series ceramic die gypsum admixture of a kind of composite fragrant sultaine of the present invention, can be obtained by following technological method: by a certain amount of fragrant sultaine, join in a small amount of anion surfactant sodium alkyl benzene sulfonate under slow stirring, mixed dissolution, then slowly stirs down a certain amount of macromole poly carboxylic acid to be dissolved in above-mentioned solution and carries out physical compounding and can obtain.
[beneficial effect]
The polycarboxylic acid series ceramic die gypsum admixture of a small amount of composite fragrant sultaine adds to after in β-semi-hydrated gypsum by the present invention, gypsum hydration process can be promoted, slow down that the macromolecular delayed coagulation of poly carboxylic acid brings disadvantageous effect, reduce water paste ratio, thus improve crockery mould gypsum intensity, improve crockery mold use efficiency, production cost, and improve mold use rate.
[embodiment]
Below in conjunction with specific embodiment, the present invention is further illustrated, but limited the present invention never in any form, and any conversion done based on training centre of the present invention or replacement, all belong to protection scope of the present invention.
Embodiment one:
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 1% of total volume, virtue sultaine accounts for 5% of total volume, all the other are macromole poly carboxylic acid), join with 0.1% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.04MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.46MPa, water-intake rate is 26.14), its folding strength increases 7.31%, ultimate compression strength is 9.00%, and water-intake rate have dropped slightly.With the ceramic die that this modified gypsum makes, its access times are brought up to 295-315 time by original 140-160 time.
Embodiment two
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 10% of total volume, all the other are macromole poly carboxylic acid), join with 0.1% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.54MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 24.76MPa, water-intake rate is 26.73), its folding strength increases 14.93%, ultimate compression strength is 14.8%, absorbs water substantially constant.With the ceramic die that this modified gypsum makes, its access times are brought up to 305-325 time by original 140-160 time.
Embodiment three
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 6% of total volume, virtue sultaine accounts for 15% of total volume, all the other are macromole poly carboxylic acid), join with 0.1% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 45 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 8.05MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 25.20MPa, water-intake rate is 27.25), its folding strength increases 22.71%, ultimate compression strength is 16.88%, and water-intake rate remains basically stable.With the ceramic die that this modified gypsum makes, its access times are brought up to 330-350 time by original 140-160 time.
Embodiment four
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 10% of total volume, all the other are macromole poly carboxylic acid), join with 0.1% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery tool mould test specimen is made again after placing 2min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.66MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 23.14MPa, water-intake rate is 26.73), its folding strength increases 16.77%, ultimate compression strength is 7.32%, and water-intake rate reduces slightly.With the ceramic die that this modified gypsum makes, its access times are brought up to 355-370 time by original 140-160 time.
Embodiment five
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 1% of total volume, virtue sultaine accounts for 10% of total volume, all the other are macromole poly carboxylic acid), join with 0.15% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 45 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.51MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 23.65MPa, water-intake rate is 26.96), its folding strength increases 14.48%, ultimate compression strength is 9.55%, and water-intake rate remains basically stable.With the ceramic die that this modified gypsum makes, its access times are brought up to 300-320 time by original 140-160 time.
Embodiment six
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 15% of total volume, all the other are macromole poly carboxylic acid), join with 0.15% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C are protected after 48 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.43MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 23.10MPa, water-intake rate is 26.99), its folding strength increases 13.30%, ultimate compression strength is 7.16%, and water-intake rate reduces 0.07%.With the ceramic die that this modified gypsum makes, its access times are brought up to 305-320 time by original 140-160 time.
Embodiment seven
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 6% of total volume, virtue sultaine accounts for 5% of total volume, all the other are macromole poly carboxylic acid), join with 0.15% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 40 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 12 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.57MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 23.72MPa, water-intake rate is 26.87), its folding strength increases 15.49%, ultimate compression strength is 10%, and water-intake rate is substantially constant.With the ceramic die that this modified gypsum makes, its access times are brought up to 320-340 time by original 140-160 time.
Embodiment eight
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 5% of total volume, all the other are macromole poly carboxylic acid), join with 0.15% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery tool mould test specimen is made again after placing 2min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.01MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.03MPa, water-intake rate is 27.1), its folding strength increases 6.86%, ultimate compression strength is 2.18%, and water-intake rate is substantially constant.With the ceramic die that this modified gypsum makes, its access times are brought up to 300-315 time by original 140-160 time.
Embodiment nine
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 1% of total volume, virtue sultaine accounts for 15% of total volume, all the other are macromole poly carboxylic acid), join with 0.2% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery mould test specimen is made again after placing 1min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 42 hours for mud material forming, ceramic die access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.07MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.72MPa, water-intake rate is 26.82), its folding strength increases 7.81%, ultimate compression strength is 5.40%, and water-intake rate remains basically stable.With the ceramic die that this modified gypsum makes, its access times are brought up to 320-335 time by original 140-160 time.
Embodiment ten
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 5% of total volume, all the other are macromole poly carboxylic acid), join with 0.2% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery tool mould test specimen is made again after placing 2min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56 MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 6.90MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.16MPa, water-intake rate is 27.11), its folding strength increases 5.12%, ultimate compression strength is 2.80%, and water-intake rate increases slightly.With the ceramic die that this modified gypsum makes, its access times are brought up to 315-330 time by original 140-160 time.
Embodiment 11
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 6% of total volume, virtue sultaine accounts for 10% of total volume, all the other are macromole poly carboxylic acid), join with 0.2% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery tool mould test specimen is made again after placing 2min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.16MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.44MPa, water-intake rate is 26.90), its folding strength increases 9.22%, ultimate compression strength is 4.00%, and water-intake rate reduces slightly.With the ceramic die that this modified gypsum makes, its access times are brought up to 345-360 time by original 140-160 time.
Embodiment 12
By the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, (wherein sodium alkyl benzene sulfonate accounts for 3% of total volume, virtue sultaine accounts for 15% of total volume, all the other are macromole poly carboxylic acid), join with 0.2% volume of gypsum quality and be mixed with solution by the water requirement of water paste ratio needed for 0.65 calculating, β-semi-hydrated gypsum is slowly evenly added in this solution in 2min, gypsum pottery tool mould test specimen is made again after placing 2min again, form removal after final set, 8 hours are deposited under room temperature, 45 DEG C of maintenances after 48 hours for mud material forming, crockery mould access times (being no more than 2mm with die edge distortion to be limited) can be tested simultaneously, the pug shaping forming time of ceramic die is 10 minutes.For intensity and water absorbing properties data determination, then mould is dried and measure gypsum test piece intensity, water absorbing properties to constant weight.Relative to blank sample gypsum test specimen, (folding strength is 6.56MPa, ultimate compression strength 21.56MPa, water-intake rate is 27.01), (folding strength is 7.56MPa to be mixed with the gypsum test specimen of the polycarboxylic acid series ceramic die gypsum admixture of composite fragrant sultaine, ultimate compression strength 22.84MPa, water-intake rate is 26.88), its folding strength increases 15.24%, ultimate compression strength is 5.94%, and water-intake rate reduces slightly.With the ceramic die that this modified gypsum makes, its access times are brought up to 335-350 time by original 140-160 time.
Claims (4)
1. the polycarboxylic acid series ceramic die gypsum admixture of a composite fragrant sultaine, it is characterized in that: the polycarboxylic acid series ceramic die gypsum admixture of described composite fragrant sultaine, its preparation method is as follows: by a certain amount of fragrant sultaine, join in a small amount of anion surfactant sodium alkyl benzene sulfonate under slow stirring, mixed dissolution, then slowly stirs down to be dissolved in above-mentioned solution by a certain amount of macromole poly carboxylic acid and carries out physical compounding.
2., by the polycarboxylic acid series ceramic die gypsum admixture of a kind of composite fragrant sultaine according to claim 1, it is characterized in that: described fragrant sultaine is dodecyl dimethyl benzyl sultaine, and its structure is as shown below:
Described sodium alkyl benzene sulfonate is Sodium dodecylbenzene sulfonate, and those skilled in the art can also replace with other sodium alkyl benzene sulfonate.
3. by the polycarboxylic acid series ceramic die gypsum admixture of a kind of composite fragrant sultaine according to claim 1, it is characterized in that: described macromole poly carboxylic acid is prepared by following methods: with mol ratio be 20: 8: 5 methylpropene sodium sulfonate, methyl thiazolinyl polyoxyethylene poly-oxygen propylene aether, N hydroxymethyl acrylamide is for monomer, take ammonium persulphate as initiator (consumption is 0.9%), carry out aqueous phase free radical reaction 8h at 80 DEG C after, be warming up to 90 DEG C, aging 1h, can terminate reaction.Being neutralized to pH with the NaOH that massfraction is 30% is after cooling 7, and its structure is as shown below.
4. by the polycarboxylic acid series ceramic die gypsum admixture of a kind of composite fragrant sultaine according to claim 1, it is characterized in that: total volume that the polycarboxylic acid series ceramic die gypsum admixture of described composite fragrant sultaine is used for β gypsum mold is 0.01%-0.2% (in β gypsum quality), the volume preferably used is 0.1%-0.15%; Wherein sodium alkyl benzene sulfonate accounts for the 1%-6% of total volume, and fragrant sultaine accounts for the 5%-15% of total volume, and all the other are macromole poly carboxylic acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410164510.2A CN105016646B (en) | 2014-04-24 | 2014-04-24 | A kind of polycarboxylic-acid ceramic die gypsum additive of the fragrant sulfobetaines of compounding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410164510.2A CN105016646B (en) | 2014-04-24 | 2014-04-24 | A kind of polycarboxylic-acid ceramic die gypsum additive of the fragrant sulfobetaines of compounding |
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| CN105016646A true CN105016646A (en) | 2015-11-04 |
| CN105016646B CN105016646B (en) | 2018-08-07 |
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| CN201410164510.2A Active CN105016646B (en) | 2014-04-24 | 2014-04-24 | A kind of polycarboxylic-acid ceramic die gypsum additive of the fragrant sulfobetaines of compounding |
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Cited By (2)
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| CN105330247A (en) * | 2015-12-04 | 2016-02-17 | 江南大学 | Formula of polyester-polyether sulfonate capable of improving gypsum strength and hydroscopicity simultaneously |
| CN113955966A (en) * | 2021-12-10 | 2022-01-21 | 广东龙湖科技股份有限公司 | Multifunctional auxiliary agent for mortar, preparation method and gypsum-based light plastering mortar composition |
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| CN102351459A (en) * | 2011-07-15 | 2012-02-15 | 清华大学 | Preparation method of sustained-release water reducer microcapsule |
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| CN102351459A (en) * | 2011-07-15 | 2012-02-15 | 清华大学 | Preparation method of sustained-release water reducer microcapsule |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105330247A (en) * | 2015-12-04 | 2016-02-17 | 江南大学 | Formula of polyester-polyether sulfonate capable of improving gypsum strength and hydroscopicity simultaneously |
| CN105330247B (en) * | 2015-12-04 | 2017-09-15 | 江南大学 | It is a kind of while improving the polyester polyether sulfonate of gypsum intensity and water imbibition |
| CN113955966A (en) * | 2021-12-10 | 2022-01-21 | 广东龙湖科技股份有限公司 | Multifunctional auxiliary agent for mortar, preparation method and gypsum-based light plastering mortar composition |
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| CN105016646B (en) | 2018-08-07 |
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