CN115108752A - Preparation method of efficient alkali-free accelerator core master batch - Google Patents
Preparation method of efficient alkali-free accelerator core master batch Download PDFInfo
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- CN115108752A CN115108752A CN202210568116.XA CN202210568116A CN115108752A CN 115108752 A CN115108752 A CN 115108752A CN 202210568116 A CN202210568116 A CN 202210568116A CN 115108752 A CN115108752 A CN 115108752A
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- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000013543 active substance Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims abstract description 5
- 239000002562 thickening agent Substances 0.000 claims abstract description 5
- 239000007798 antifreeze agent Substances 0.000 claims abstract description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 6
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 6
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229960001124 trientine Drugs 0.000 claims description 3
- RFRMMZAKBNXNHE-UHFFFAOYSA-N 6-[4,6-dihydroxy-5-(2-hydroxyethoxy)-2-(hydroxymethyl)oxan-3-yl]oxy-2-(hydroxymethyl)-5-(2-hydroxypropoxy)oxane-3,4-diol Chemical compound CC(O)COC1C(O)C(O)C(CO)OC1OC1C(O)C(OCCO)C(O)OC1CO RFRMMZAKBNXNHE-UHFFFAOYSA-N 0.000 claims description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 2
- 229960001763 zinc sulfate Drugs 0.000 claims description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 2
- 230000002528 anti-freeze Effects 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of a core master batch of a high-efficiency alkali-free accelerator, which comprises the following steps: the method comprises the following steps: preparing raw materials in parts by weight: 10-20 parts of quick-setting base material, 4-6 parts of anti-settling agent, 3-8 parts of stabilizer, 1-5 parts of thickener, 4-10 parts of antifreeze agent, 1-1.5 parts of pH regulator and 6-8 parts of active agent, wherein the active agent is modified palygorskite; step two: mixing the raw materials, adding the mixture into water with the temperature of 60-70 ℃, and stirring for 1-3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator. According to the invention, the modified palygorskite is added into the accelerating agent as an active agent, and is subjected to high-pressure hot water stirring treatment, so that the defect of over-strong adsorption binding force of the palygorskite is overcome, refined and dispersed palygorskite is obtained, the activity of the palygorskite can be improved through roasting treatment, the integral binding capacity of the palygorskite is obviously improved, the compatibility with concrete particles is improved, the setting time is shortened, the concrete setting structure is improved, and the concrete strength is improved.
Description
Technical Field
The invention relates to the technical field of concrete accelerators, in particular to a preparation method of a core master batch of a high-efficiency alkali-free accelerator.
Background
The accelerating agent is an additive which is added into the concrete and can enable the concrete to be rapidly set and hardened. The main types are inorganic salts and organic substances. The powdery solid only accounts for 2-3% of the cement content in the concrete, but can cause the concrete to be initially set within 5min and the setting accelerator to be set within 12 min. So as to achieve the purpose of rapid concrete setting in rush repairs or roadways. Is an indispensable additive in the construction method of sprayed concrete. Their function is to accelerate the hydration hardening of the cement and to develop sufficient strength in a very short time to guarantee the requirements of the particular construction.
In recent years, alkali-free setting accelerators are gradually applied to the market, and the alkali-free setting accelerators can solve the common problems of the alkali-free setting accelerators such as: the damage to underground construction environment, the damage to alkali aggregate reaction, the damage to high PH value in the using process, the loss of later strength of sprayed concrete and the like. However, the existing alkali-free setting accelerators have the problems of poor compatibility with cement and poor bonding effect, and cause the phenomena of long setting time and low strength after setting of the cement.
Disclosure of Invention
The invention aims to provide a preparation method of a core master batch of a high-efficiency alkali-free accelerator, which solves the problems of poor compatibility with cement and poor combination effect of the existing alkali-free accelerator.
The invention realizes the purpose through the following technical scheme:
a preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 10-20 parts of quick-setting base material, 4-6 parts of anti-settling agent, 3-8 parts of stabilizer, 1-5 parts of thickener, 4-10 parts of antifreeze agent, 1-1.5 parts of pH regulator and 6-8 parts of active agent, wherein the active agent is modified palygorskite;
step two: mixing the raw materials, adding the mixture into water with the temperature of 60-70 ℃, and stirring for 1-3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
The further improvement is that the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 70-85 deg.C and 0.25-0.55MPa for 3-8 hr, separating, and drying; then the dried palygorskite is roasted for 1-5h at the temperature of 220-250 ℃.
The further improvement is that the quick-setting base material is one or more of aluminum sulfate, magnesium sulfate, ferric sulfate and zinc sulfate.
The further improvement is that the stabilizing agent is one of acrylic acid, acrylamide and polyacrylamide.
The further improvement is that the antifreeze agent is one of methanol, diethylenetriamine, triethylene tetramine and tetraethylenepentamine.
The further improvement is that the anti-settling agent is one of magnesium aluminum silicate and nano aluminum hydroxide.
The further improvement is that the thickening agent is one of hydroxypropyl methyl cellulose and hydroxyethyl cellulose.
The further improvement is that the pH regulator is one of acetic acid, lactic acid and hydrofluoric acid.
The invention has the beneficial effects that: according to the invention, the modified palygorskite is added into the accelerator as an active agent, and the modified palygorskite is subjected to high-pressure hot water stirring treatment, so that the defect of over-strong adsorption adhesion force of the palygorskite is overcome, the refined and dispersed palygorskite is obtained, the activity of the palygorskite can be improved through roasting treatment, the integral bonding capacity of the palygorskite is obviously improved, the compatibility with concrete particles is improved, the setting time is shortened, the concrete setting structure is improved, and the concrete strength is improved.
Detailed Description
The present application is described in further detail below with reference to examples, and it should be noted that the following detailed description is provided for further explanation of the present application and should not be construed as limiting the scope of the present application, and that certain insubstantial modifications and adaptations of the present application may be made by those skilled in the art based on the above-mentioned disclosure.
Example 1
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 10 parts of aluminum sulfate, 4 parts of magnesium aluminum silicate, 3 parts of acrylic acid, 1 part of hydroxypropyl methyl cellulose, 4 parts of methanol, 1 part of acetic acid and 6 parts of modified palygorskite, wherein the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 70 deg.C and 0.25MPa for 3 hr, separating, and drying; then placing the dried palygorskite at 220 ℃ for roasting for 1 hour;
step two: and mixing the raw materials, adding the mixture into water at the temperature of 60 ℃, and stirring for 1h to obtain the core master batch of the high-efficiency alkali-free accelerator.
Example 2
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 15 parts of aluminum sulfate, 5 parts of nano aluminum hydroxide, 7 parts of polyacrylamide, 3 parts of hydroxyethyl cellulose, 7 parts of triethylene tetramine, 1.2 parts of lactic acid and 7 parts of modified palygorskite, wherein the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 75 deg.C and 0.4MPa for 6 hr, separating, and drying; then roasting the dried palygorskite at 240 ℃ for 3 hours;
step two: and mixing the raw materials, adding the mixture into water with the temperature of 65 ℃, and stirring for 2 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
Example 3
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 20 parts of magnesium sulfate, 6 parts of magnesium aluminum silicate, 8 parts of acrylamide, 5 parts of hydroxypropyl methyl cellulose, 10 parts of tetraethylenepentamine, 1.5 parts of acetic acid and 8 parts of modified palygorskite, wherein the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 85 deg.C and 0.55MPa for 8 hr, separating, and drying; then placing the dried palygorskite at 250 ℃ for roasting for 5 hours;
step two: and (3) mixing the raw materials, adding the mixture into water with the temperature of 70 ℃, and stirring for 3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
Comparative example 1
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 20 parts of magnesium sulfate, 6 parts of magnesium aluminum silicate, 8 parts of acrylamide, 5 parts of hydroxypropyl methyl cellulose, 10 parts of tetraethylenepentamine, 1.5 parts of acetic acid and 8 parts of palygorskite;
step two: mixing the raw materials, adding the mixture into water with the temperature of 70 ℃, and stirring for 3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
Comparative example 2
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 20 parts of magnesium sulfate, 6 parts of magnesium aluminum silicate, 8 parts of acrylamide, 5 parts of hydroxypropyl methyl cellulose, 10 parts of tetraethylenepentamine, 1.5 parts of acetic acid and 8 parts of modified palygorskite, wherein the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 85 deg.C and 0.55MPa for 8 hr, separating, and drying;
step two: mixing the raw materials, adding the mixture into water with the temperature of 70 ℃, and stirring for 3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
Comparative example 3
A preparation method of a core master batch of a high-efficiency alkali-free accelerator comprises the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 20 parts of magnesium sulfate, 6 parts of magnesium aluminum silicate, 8 parts of acrylamide, 5 parts of hydroxypropyl methyl cellulose, 10 parts of tetraethylenepentamine, 1.5 parts of acetic acid and 8 parts of modified palygorskite, wherein the preparation method of the modified palygorskite comprises the following steps: calcining the palygorskite at 250 ℃ for 5 hours;
step two: mixing the raw materials, adding the mixture into water with the temperature of 70 ℃, and stirring for 3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
The core master batch of the high-efficiency alkali-free accelerator obtained in examples 1 to 3 and comparative examples 1 to 3 was added to the concrete slurry in an amount of 4% and 6% by weight based on the weight of the concrete. The cement paste setting time and the cement mortar strength test are carried out according to the requirements of Chinese building material industry standard JC477-2005 accelerator for sprayed concrete, the initial setting time, the final setting time, the 1d strength and the 28d strength ratio (compared with the cement strength without the accelerator) are respectively tested, and the test results are as follows:
from the results of the above table, it can be seen that examples 1 to 3 of the present invention are excellent in both setting time and mortar strength, while comparative example 1 has a significantly reduced final effect due to the replacement of modified palygorskite with palygorskite, and comparative examples 2 and 3 have been adjusted in the step of modifying palygorskite, have a poor final effect, and are not significantly improved as compared to comparative example 1. Therefore, the high-pressure hot water stirring treatment and the roasting treatment for the palygorskite are particularly critical and are not necessary.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention.
Claims (8)
1. The preparation method of the core master batch of the high-efficiency alkali-free accelerator is characterized by comprising the following steps:
the method comprises the following steps: preparing raw materials in parts by weight: 10-20 parts of quick-setting base material, 4-6 parts of anti-settling agent, 3-8 parts of stabilizer, 1-5 parts of thickener, 4-10 parts of antifreeze agent, 1-1.5 parts of pH regulator and 6-8 parts of active agent, wherein the active agent is modified palygorskite;
step two: mixing the raw materials, adding the mixture into water with the temperature of 60-70 ℃, and stirring for 1-3 hours to obtain the core master batch of the high-efficiency alkali-free accelerator.
2. The preparation method of the high-efficiency alkali-free accelerator core master batch as claimed in claim 1, wherein the preparation method of the modified palygorskite comprises the following steps: mixing palygorskite with water, stirring at 70-85 deg.C and 0.25-0.55MPa for 3-8 hr, separating, and drying; then the dried palygorskite is roasted for 1-5h at the temperature of 220-250 ℃.
3. The preparation method of the core master batch of the high-efficiency alkali-free accelerator as claimed in claim 1, wherein the accelerator base material is one or more of aluminum sulfate, magnesium sulfate, ferric sulfate and zinc sulfate.
4. The method for preparing the core master batch of the high-efficiency alkali-free accelerator as claimed in claim 1, wherein the stabilizer is one of acrylic acid, acrylamide and polyacrylamide.
5. The method for preparing the core master batch of the high-efficiency alkali-free accelerator as claimed in claim 1, wherein the antifreeze is one selected from methanol, diethylenetriamine, triethylene tetramine and tetraethylenepentamine.
6. The preparation method of the high-efficiency alkali-free accelerator core master batch as claimed in claim 1, wherein the anti-settling agent is one of magnesium aluminum silicate and nano aluminum hydroxide.
7. The preparation method of the high-efficiency alkali-free accelerator core master batch as claimed in claim 1, wherein the thickener is one of hydroxypropyl methylcellulose and hydroxyethyl cellulose.
8. The preparation method of the high-efficiency alkali-free accelerator core master batch as claimed in claim 1, wherein the pH regulator is one of acetic acid, lactic acid and hydrofluoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210568116.XA CN115108752A (en) | 2022-05-24 | 2022-05-24 | Preparation method of efficient alkali-free accelerator core master batch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210568116.XA CN115108752A (en) | 2022-05-24 | 2022-05-24 | Preparation method of efficient alkali-free accelerator core master batch |
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| CN115108752A true CN115108752A (en) | 2022-09-27 |
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| CN202210568116.XA Pending CN115108752A (en) | 2022-05-24 | 2022-05-24 | Preparation method of efficient alkali-free accelerator core master batch |
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2022
- 2022-05-24 CN CN202210568116.XA patent/CN115108752A/en active Pending
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Application publication date: 20220927 |