CN1438082A - Silica sol binder and preparation method thereof - Google Patents
Silica sol binder and preparation method thereof Download PDFInfo
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- CN1438082A CN1438082A CN 02160715 CN02160715A CN1438082A CN 1438082 A CN1438082 A CN 1438082A CN 02160715 CN02160715 CN 02160715 CN 02160715 A CN02160715 A CN 02160715A CN 1438082 A CN1438082 A CN 1438082A
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- silica sol
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- sio
- pva
- sol binder
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 title claims abstract description 325
- 239000011230 binding agent Substances 0.000 title claims abstract description 206
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000243 solution Substances 0.000 claims abstract description 104
- 239000007864 aqueous solution Substances 0.000 claims abstract description 61
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 172
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 163
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 140
- 239000003456 ion exchange resin Substances 0.000 claims description 140
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 140
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 62
- 229910021645 metal ion Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 16
- 238000005495 investment casting Methods 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 7
- 229920000642 polymer Polymers 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 159
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 159
- 229920002451 polyvinyl alcohol Polymers 0.000 description 158
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 35
- 238000003756 stirring Methods 0.000 description 34
- 238000005266 casting Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 206010013082 Discomfort Diseases 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000009938 salting Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
Abstract
The invention discloses a silica sol binder modified by high polymer and a preparation method thereof. The technical scheme is as follows: a silica sol binder contains 20-30% SiO2Alkali silica sol of (2) or less than [ (32-100 x SiO ]2％)/320]X 100% PVA, manufacturing method: a. preparing PVA aqueous solution; b. preparing an alkaline silica sol solution; c. mixing the two solutions a and b and homogenizing. In the method for producing the silica sol binder, the pH is adjusted after the preparation of the alkaline silica sol solution or after the mixing of the solutions a and b. The silica sol binder is alkaline, so that the silica sol binder is suitable for the use habit of investment casting manufacturers, contains PVA, and can accelerate the drying speed, improve the normal temperature strength of a shell during investment casting and reduce the residual strength in the application of the silica sol binder in the investment casting industry; on the other hand, the invention has simple process, low production cost and good popularization value.
Description
Technical field
The invention belongs to binding agent composite and manufacture method thereof, particularly a kind of silica sol binder and manufacture method thereof with modified-high polymer.
Background technology
Binding agent is the main raw material(s) of moltening mold castings, and it directly affects shell and casting quality, production cycle and cost.Nineteen thirty-nine adopts alcohol radical silicate hydrolyzate liquid to make binding agent when model casting industry produces, nineteen sixty is introduced water base silica sol binder.For a long time, silica sol binder is being updated development, uses with Na at first
+Used as stabilizers, colloid diameter be at 12-15nm, SiO
2Content is at 30% binding agent.The small particle diameter Ludox that occurred 7-8nm in 1970 uses in investment precoat.But the silica sol binder rate of drying is slow, and the inefficient shortcoming of system shell has restricted its faster development.
Along with environmental requirement is more and more higher, some countries of the nineties have promoted in the model casting industry by the development of pure based binder to water base silica sol binder by the environmental regulation of " reducing organic volatile content in the air ".The nineties E.I.Du Pont Company develops the water-base fast-drying binding agent that contains high polymer, to eliminate the organic volatile that exists in the system shell workshop, and kept the production efficiency suitable with silester, drop into production application in Britain Rolls Royce company smoothly afterwards.
But this class Ludox of modified-high polymer, Suan Xing Ludox often, as american documentation literature on June 2nd, 1992 (publication number is US 005118727A) disclosed " a kind of Ludox stabilized mixture that contains polymer ", document has been put down in writing a kind of silica sol binder, it comprises silicon sol solution and PVA or methylcellulose, and generates under pH value 2.7-7.0.But following problem can occur in actual applications: acidic region can keep the stable existence of Ludox and high polymer, but has brought the many discomforts in using.At first, now adopt water base Ludox to do the model casting producer of binding agent, its pH value of employed Ludox is generally at 8.0-10.5, often about 9.0, use the change of binding agent pH value can cause a lot of customary discomforts, on the other hand, acidic silicasol tends to improve the performance requirement of moltening mold castings refractory material, particularly purity and extract requirement.What what is more important, this patent were mentioned carries out acidifying, deionization and the metal ion performance modification of high request to Ludox, both can bring technologic loaded down with trivial details, more can bring the rising of cost and the raising of price, limited its promotion and application.
Certainly, the modified silicasol binding agent also can be used for some fields outside the model casting, and acidic silicasol can be limited in the application in some fields.
Summary of the invention
The problem that quasi-solution of the present invention is determined provide a kind of directly from alkaline silica sol make and with the water soluble polymer modification, the simple silica sol binder of technology and manufacture method thereof.Can be the model casting industry a kind of more suitable, silica sol binder cheaply is provided.
For addressing the above problem, the present invention has adopted following technical scheme: a kind of silica sol binder, its composition contains 20-30% SiO
2Alkaline silica sol, be not higher than [(32-100 * SiO
2PVA %)/320] * 100%, SiO
2% is SiO in the solution
2The quality percentage composition, described PVA is a polyvinyl alcohol, [(32-100 * SiO
2Calculated value %)/320] * 100% is the quality percentage composition of PVA in the solution.
Its acid-base value of the above silica sol binder is that the pH value is at 7.5-9.5.
The manufacture method of silica sol binder of the present invention:
A, the preparation PVA aqueous solution;
B, preparation alkaline silica sol solution;
C, two kinds of solution of mixing a, b, and make it even.
In the manufacture method of above-mentioned silica sol binder, also carried out the adjustment of pH value behind the described preparation alkaline silica sol solution or after two kinds of solution of described a, b mix, described pH adjusted value be by adding through watery hydrochloric acid or dilute sulfuric acid or+the soluble-salt solution of divalent metal ion or+ion exchange resin after the soluble-salt solution-treated of 3 valence metal ions.
The soluble-salt of above-mentioned+divalent metal ion is CaCl
2The soluble-salt of ,+3 valence metal ion is AlCl
3
Adopted technique scheme, on the one hand because silica sol binder of the present invention is alkaline, adapt to the use habit of model casting producer, and contain PVA in the silica sol binder of the present invention, silica sol binder can be accelerated rate of drying in the model casting sector application, the normal temperature strength of shell when improving model casting, reduce retained strength, through evidence, silica sol binder of the present invention can shorten drying time between model casting system shell, improve normal temperature strength, reduce retained strength.On the other hand, silica sol binder of the present invention can directly add the PVA aqueous solution with alkaline silica sol and make, and technology is simple, and production cost is low.
The specific embodiment
(1) preparation of the PVA aqueous solution, preparation steps is as follows;
A. according to the concentration of required PVA, calculate required solution and need amount of water, PVA amount;
B. in container, add the water of amount of calculation 85～95%, at room temperature, slowly add PVA under 70～100 rev/mins the stirring, fully stir about 15 minutes, it is fully disperseed;
C. the solid on wash agitation blade or the chamber wall continues to stir the mixture, until PVA particle and water are evenly disperseed;
D. solution is heated to about 90 ℃, continues stirring and PVA was fully dissolved in 30～60 minutes;
E. be cooled to room temperature or nearly room temperature while stirring;
F. supply water to amount of calculation, the back that stirs is standby.
(2) preparation of alkaline silica sol, conventional ordinary silicon colloidal sol all can satisfy requirement of the present invention, and its index is generally: SiO
2Content is up to 50% at 10-40%, and pH value is at 8.5-10.5, if pH value is too high, can suitably adjust pH value.Adjusting range often needs to decide according to product requirement.PH value as initial alkaline silica sol has reached the silica sol binder requirement, also can not adjust, even also be like this when higher pH value.Equally, even the pH value of beginning Ludox is lower, but also need be adjusted accordingly as the acid-base value that does not meet the finished product requirement.
Certainly, in this patent implementation process, adjust pH value and can directly adjust in initial alkaline silica sol, also can adjust after alkaline silica sol and PVA or modified starch or modified cellulose aqueous solution, the method for adjustment and technology are duplicate.
But adjusting the pH value spent ion exchange resin realizes according to a conventional method.Can be the exchange column of fixed bed method, also can use dynamic method.Ion exchange resin uses acid (as rare HCl, rare H before use
2SO
4) or the salting liquid processing.The salting liquid here be meant contain+divalent ,+the soluble-salt solution of 3 valence metal ions.The ion exchange resin using method can consult relevant books.
(3) mix.The above-mentioned two alkaline colloidal sols that make of step and PVA solution under agitation mixed get final product, the order of mixing to be slowly adding PVA solution for well in the Ludox that stirs, if the back silica sol binder SiO of mixing
2Content and PVA too high levels can be diluted by adding distilled water.
Experiment showed, SiO in the addition of PVA and the solution
2Content has correlation, can influence its stability too much as the adding of PVA, and experiment obtains guaranteeing that the empirical equation of solution-stabilized PVA maximum percentage composition is: [(32-100 * SiO
2%)/320] * 100%.SiO in silicon sol solution
2In the content practical application, can be by adjusting SiO in the alkaline silica sol solution
2Content, the concentration of the PVA aqueous solution, and certain distillation water yield require to calculate adding according to finished product and get final product.
Embodiment 1: get PVA0.6 gram, add 5.4 gram water, being mixed with 6 grams, to contain the aqueous solution of 10%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 9.5.
Embodiment 2: get PVA0.4 gram, add 5.6 gram water, being mixed with 6 grams, to contain the aqueous solution of 6.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 9.5.
Embodiment 3: get PVA0.1 gram, add 5.9 gram water, being mixed with 6 grams, to contain the aqueous solution of 1.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% salt sulfuric acid treatment to cross contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 9.5.
Embodiment 4: get PVA0.6 gram, add 5.4 gram water, being mixed with 6 grams, to contain the aqueous solution of 10%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 8.5.
Embodiment 5: get PVA0.4 gram, add 5.6 gram water, being mixed with 6 grams, to contain the aqueous solution of 6.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 8.5.
Embodiment 6: get PVA0.1 gram, add 5.9 gram water, being mixed with 6 grams, to contain the aqueous solution of 1.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 8.5.
Embodiment 7: get PVA0.6 gram, add 5.4 gram water, being mixed with 6 grams, to contain the aqueous solution of 10%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.6%, and pH value is 7.5.
Embodiment 8: get PVA0.4 gram, add 5.6 gram water, being mixed with 6 grams, to contain the aqueous solution of 6.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.4%, and pH value is 7.5.
Embodiment 9: get PVA0.1 gram, add 5.9 gram water, being mixed with 6 grams, to contain the aqueous solution of 1.7%PVA standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 6 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.1%, and pH value is 7.5.
Embodiment 10: get the PVA2.2 gram, add 19.8 gram water, the aqueous solution that is mixed with 22 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 22 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25%, and PVA content is 2.2%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25%, and PVA content is 2.6%, and pH value is 9.5.
Embodiment 11: get PVA0.5 gram, add 9.5 gram water, being mixed with 10 grams, to contain the aqueous solution of 5%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.5%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.5%, and pH value is 9.5.
Embodiment 12: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 9.5.
Embodiment 13: get the PVA2.2 gram, add 19.8 gram water, the aqueous solution that is mixed with 22 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 22 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25%, and PVA content is 2.2%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25%, and PVA content is 2.6%, and pH value is 8.5.
Embodiment 14: get PVA0.5 gram, add 8.5 gram water, being mixed with 10 grams, to contain the aqueous solution of 5%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.5%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.5%, and pH value is 8.5.
Embodiment 15: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaC1
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 8.5.
Embodiment 16: get the PVA2.2 gram, add 19.8 gram water, the aqueous solution that is mixed with 22 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 94 and restrains, under continuous stirring, slowly add prepare previously 22 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25%, and PVA content is 2.2%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25%, and PVA content is 2.6%, and pH value is 7.5.
Embodiment 17: get PVA0.5 gram, add 7.5 gram water, being mixed with 10 grams, to contain the aqueous solution of 5%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.5%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 30%, and PVA content is 0.5%, and pH value is 7.5.
Embodiment 18: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 28%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 28%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% salt sulfuric acid treatment to cross contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 25.2%, and PVA content is 0.1%, and pH value is 7.5.
Embodiment 19: get the PVA3.75 gram, add 33.75 gram water, the aqueous solution that is mixed with 37.5 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 62.5 and restrains, under continuous stirring, slowly add prepare previously 37.5 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 9.5.
Embodiment 20: get PVAl.6 gram, add 18.4 gram water, being mixed with 20 grams, to contain the aqueous solution of 8%PVA standby.Get and contain 25%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 80 and restrains, under continuous stirring, slowly add prepare previously 20 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 25%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 25%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 9.5.
Embodiment 21: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 22.2%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 9.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 9.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 22.2%SiO
2, pH value is 9.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 9.5.
Embodiment 22:VA3.75 gram adds 33.75 gram water, and the aqueous solution that is mixed with 37.5 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 62.5 and restrains, under continuous stirring, slowly add prepare previously 37.5 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 8.5.
Embodiment 23: get PVA1.6 gram, add 18.4 gram water, being mixed with 20 grams, to contain the aqueous solution of 8%PVA standby.Get and contain 25%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 80 and restrains, under continuous stirring, slowly add prepare previously 20 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 25%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 25%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 8.5.
Embodiment 24: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 22.2%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 8.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 8.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 22.2%SiO
2, pH value is 8.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 8.5.
Embodiment 25: get the PVA3.75 gram, add 33.75 gram water, the aqueous solution that is mixed with 37.5 gram 10%PVA is standby.Get and contain 32%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 62.5 and restrains, under continuous stirring, slowly add prepare previously 37.5 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 32%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 32%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 3.75%, and pH value is 7.5.
Embodiment 26: get PVA1.6 gram, add 18.4 gram water, being mixed with 20 grams, to contain the aqueous solution of 8%PVA standby.Get and contain 25%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 80 and restrains, under continuous stirring, slowly add prepare previously 20 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 25%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 25%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 28%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 1.6%, and pH value is 7.5.
Embodiment 27: get PVA0.1 gram, add 9.9 gram water, being mixed with 10 grams, to contain the aqueous solution of 1%PVA standby.Get and contain 22.2%SiO
2, pH value is 10.5 alkaline silica sol, 100 grams, the ion exchange resin treatment through 5% watery hydrochloric acid was handled makes its pH value to 7.5, gets this solution 90 and restrains, under continuous stirring, slowly add prepare previously 10 restrain the PVA aqueous solution.Obtain silica sol binder 100 grams of the present invention after the mixing, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 7.5.
According to present embodiment, the ion exchange resin treatment that the ion exchange resin of handling with 5% dilute sulfuric acid replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
Equally, directly take and contain 22.2%SiO
2, pH value is 7.5 alkaline silica sol, directly adds PVA solution as stated above and also can obtain silica sol binder same as described above, its result of use is also the same with above-mentioned silica sol binder.
In addition, with 5% CaCl
2Or ALCl
3The ion exchange resin treatment that the ion exchange resin that solution-treated is crossed replaces 5% watery hydrochloric acid to handle contains 22.2%SiO
2, pH value is 10.5 alkaline silica sol, available silica sol binder, its SiO
2Content is 20%, and PVA content is 0.1%, and pH value is 7.5.
For the serviceability of Ludox in hot investment casting of checking the foregoing description to be mixed with, the applicant has measured the performance indications of the made silicasol case of each embodiment by the process of simulation hot investment casting, and concrete grammar is as follows:
1, make wax-pattern: with warm wax (K512) preparation size in the commodity hot investment casting usefulness is that the wax-pattern of 12.7mm * 25.4mm * 203.2mm is some.
2, preparation coating: the hot investment casting of opening Luan mineral office with homemade Hebei is prepared coating with 200 order coal-gangue-powders and each embodiment institute preparing silicon collosol with about 1.5 powder liquor ratio, and the control dope viscosity is 20～22 seconds (with No. 4 paint cups tests).
3, system coating lump: coating evenly is applied on the wax-pattern, sprinkles air dry behind the 30/60 order bastard coal sand, repeat to be coated with extension again after to be dried, be coated with four layers altogether, last not stucco of one deck.
Environmental condition: relative humidity 60～70%, 22～25 ℃ of temperature, common electric fan blowing (about 3 meter per seconds of wind speed).
When hanging down one deck to be coated with, the interlayer drying time moltenly can be coated with smoothly that to hang be standard less time.
Be coated with the dewaxing of heating after hanging 24 hours finishing.
4, normal temperature strength is measured: 3 prepared coating lumps are incubated 2 hours down at 110 ℃, measure its intensity.
5, elevated temperature strength is measured: 3 prepared coating lumps are put into roaster, 300 ℃ to be lowered to stove, be warming up to 900 ℃ gradually, be incubated 2 hours, reduce to below 300 ℃ and come out of the stove, measure its intensity.
6, retained strength is measured: 3 prepared coating lumps are put into roaster, 300 ℃ to be lowered to stove, be warming up to 1500 ℃ gradually, be incubated 2 hours, reduce to below 300 ℃ and come out of the stove, measure its intensity.
Above-mentioned 4,5,6 measuring methods and instrument are according to HB5352.1-86 " (investment casting shell bending strength measuring method ".
Sample to 27 embodiment is tested, and contrast Shangyu city space reaches the GS-30 of chemical industry Co., Ltd Ludox and commercially available silester 32 has carried out contrast test, and silester has carried out hydrolysis process before preparation coating.
From the situation of test, to the Ludox of same ingredients, its coating and shell performance basically identical when different PH.That influence the Ludox serviceability mainly is SiO wherein
2Content and PVA content.According to test, each embodiment detection case is as follows:
| Embodiment and control group | ?SiO 2％ | ???PVA％ | The interlayer drying time (hr) | Elevated temperature strength (MPa) | Normal temperature strength (MPa) | Retained strength (MPa) | Be suitable for casting field |
| ???1、4、7 | ???30 | ???0.6 | ????0.5 | ????9.0 | ????5.6 | ????4.6 | High request stainless steel and high-temperature alloy steel such as titanium alloy material |
| ???2、5、8 | ???30 | ???0.4 | ????0.5 | ????9.0 | ????5.5 | ????4.8 | |
| ???3、6、9 | ???30 | ???0.1 | ????3 | ????9.0 | ????4.6 | ????5.2 | |
| ???10、13、16 | ???25 | ???2.2 | ????0.5 | ????8.0 | ????5.4 | ????3.6 | Common stainless steel and part copper, aluminum alloy materials |
| ???11、14、17 | ???25.2 | ???0.5 | ????1.5 | ????8.1 | ????4.7 | ????4.2 | |
| ???12、15、18 | ???25 | ???0.1 | ????5 | ????8.0 | ????4.0 | ????4.8 | |
| ???19、22、25 | ???20 | ???3.75 | ????1 | ????6.0 | ????4.8 | ????3.1 | Low-temperature alloy such as copper, aluminium material |
| ???20、23、26 | ???20 | ???1.6 | ????2.5 | ????6.0 | ????4.2 | ????3.2 | |
| ???21、24、27 | ???20 | ???0.1 | ????7.5 | ????6.0 | ????3.5 | ????3.4 | |
| ???GS-30 | ???30 | ????8 | ????9.1 | ????4.5 | ????5.6 | ||
| Silester 32 | ????1 | ????6.5 | ????4.3 | ????4.4 |
From the effect of the various embodiments described above as seen, silica sol binder of the present invention is applicable to different founding materials fields, has good application value.
Claims (6)
1, a kind of silica sol binder is characterized in that its composition contains 20-30%SiO
2Alkaline silica sol, be not higher than [(32-100 * SiO
2PVA %)/320] * 100%.
2, silica sol binder according to claim 1 is characterized in that its acid-base value of described silica sol binder is that the pH value is at 7.5-9.5.
3, the manufacture method of silica sol binder noted earlier:
A, the preparation PVA aqueous solution;
B, preparation alkaline silica sol solution;
C, two kinds of solution of mixing a, b, and make it even.
4, according to the manufacture method of the described silica sol binder of claim 3, also carried out the adjustment of pH value behind the described preparation alkaline silica sol solution or after two kinds of solution of described a, b mix, described pH adjusted value be by adding through watery hydrochloric acid or dilute sulfuric acid or+the soluble-salt solution of divalent metal ion or+ion exchange resin after the soluble-salt solution-treated of 3 valence metal ions.
5,, it is characterized in that the soluble-salt of described+divalent metal ion is CaCl according to the manufacture method of the described silica sol binder of claim 4
2
6,, it is characterized in that the soluble-salt of described+3 valence metal ions is AlCl according to the manufacture method of the described silica sol binder of claim 4
3
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| CN02131750.X | 2002-09-16 | ||
| CN 02131750 CN1414054A (en) | 2002-09-16 | 2002-09-16 | Silica sol binder and preparation method thereof |
| CN 02160715 CN1243619C (en) | 2002-09-16 | 2002-12-31 | Silica sol binder and preparation method thereof |
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| CN1243619C CN1243619C (en) | 2006-03-01 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295042C (en) * | 2003-11-19 | 2007-01-17 | 章浩龙 | Aluminum modified alkaline silicasol |
| CN100451084C (en) * | 2006-08-23 | 2009-01-14 | 河北北方绿野居住环境发展有限公司 | Environmental protection type adhesion agent for wood industry |
| CN101885036A (en) * | 2010-06-25 | 2010-11-17 | 武汉市智发科技开发有限公司 | Modified formula for enhancing rapidly-dried silica sol |
| CN101786139B (en) * | 2009-12-31 | 2012-09-26 | 东莞市惠和硅制品有限公司 | Polymer-modified silicasol and manufacturing method thereof |
| CN103920851A (en) * | 2014-03-04 | 2014-07-16 | 清华大学 | Method for changing strength of shell by impregnating with organic binder |
| CN107598076A (en) * | 2017-08-01 | 2018-01-19 | 安徽霍山科皖特种铸造有限责任公司 | A kind of preparation method of model casting ceramic shell silica sol binder |
| CN107695286A (en) * | 2017-10-12 | 2018-02-16 | 东风精密铸造安徽有限公司 | A kind of founding materials highly effective binder |
| CN110802196A (en) * | 2019-10-22 | 2020-02-18 | 东风精密铸造安徽有限公司 | Silica sol binder for shell |
| CN111570719A (en) * | 2020-05-20 | 2020-08-25 | 无锡卡仕精密科技有限公司 | Silica sol modified coating for precision casting |
| CN114012029A (en) * | 2021-12-13 | 2022-02-08 | 山东金亿达新材料有限公司 | Amino resin modified silica sol and preparation method thereof |
| CN114669717A (en) * | 2022-03-29 | 2022-06-28 | 阳江市惠尔特新材料科技有限公司 | Modified silica sol and preparation method and application thereof |
-
2002
- 2002-12-31 CN CN 02160715 patent/CN1243619C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295042C (en) * | 2003-11-19 | 2007-01-17 | 章浩龙 | Aluminum modified alkaline silicasol |
| CN100451084C (en) * | 2006-08-23 | 2009-01-14 | 河北北方绿野居住环境发展有限公司 | Environmental protection type adhesion agent for wood industry |
| CN101786139B (en) * | 2009-12-31 | 2012-09-26 | 东莞市惠和硅制品有限公司 | Polymer-modified silicasol and manufacturing method thereof |
| CN101885036A (en) * | 2010-06-25 | 2010-11-17 | 武汉市智发科技开发有限公司 | Modified formula for enhancing rapidly-dried silica sol |
| CN103920851A (en) * | 2014-03-04 | 2014-07-16 | 清华大学 | Method for changing strength of shell by impregnating with organic binder |
| CN103920851B (en) * | 2014-03-04 | 2016-08-17 | 清华大学 | A kind of method changing investment shell intensity by dipping organic binder bond |
| CN107598076A (en) * | 2017-08-01 | 2018-01-19 | 安徽霍山科皖特种铸造有限责任公司 | A kind of preparation method of model casting ceramic shell silica sol binder |
| CN107695286A (en) * | 2017-10-12 | 2018-02-16 | 东风精密铸造安徽有限公司 | A kind of founding materials highly effective binder |
| CN110802196A (en) * | 2019-10-22 | 2020-02-18 | 东风精密铸造安徽有限公司 | Silica sol binder for shell |
| CN111570719A (en) * | 2020-05-20 | 2020-08-25 | 无锡卡仕精密科技有限公司 | Silica sol modified coating for precision casting |
| CN114012029A (en) * | 2021-12-13 | 2022-02-08 | 山东金亿达新材料有限公司 | Amino resin modified silica sol and preparation method thereof |
| CN114669717A (en) * | 2022-03-29 | 2022-06-28 | 阳江市惠尔特新材料科技有限公司 | Modified silica sol and preparation method and application thereof |
| CN114669717B (en) * | 2022-03-29 | 2024-01-26 | 阳江市惠尔特新材料科技有限公司 | Modified silica sol and preparation method and application thereof |
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