CN110204238A - A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof - Google Patents
A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof Download PDFInfo
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- CN110204238A CN110204238A CN201910507900.8A CN201910507900A CN110204238A CN 110204238 A CN110204238 A CN 110204238A CN 201910507900 A CN201910507900 A CN 201910507900A CN 110204238 A CN110204238 A CN 110204238A
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof, accelerator raw material of the invention and each component mass percent are as follows: aluminum sulfate 45%~52%；Lithium metasilicate 1%~5%；Manganese fluosilicate 5%~10%；PH adjusting agent 1%~3%；Suspension stabilizer 0.5%~1%；Surplus is water, and total amount supplies 100%.Water-soluble powdery alkali-free quick-coagulant of the invention can meet the alkali-free standard for 1) reaching GB/T35159-2017 " gunite concrete accelerator " simultaneously；2) normality is solid-state powder raw material, is needed convenient for long-distance transport；3) there is extraordinary water solubility when using；4) 4 points of stability requirements after use with superelevation, are applied clinically and popularized value with good.
Description
Technical field
The invention belongs to additive for building material technical field, more particularly to a kind of water-soluble powdery alkali-free quick-coagulant and
Preparation method and application.
Background technique
Accelerator is the additive that concrete or cement mortar can be made to condense hardening rapidly, is widely used in mine working branch
In shield, tunnel gunite concrete and spray furnace construction, first-aid repair construction.The technical process of gunite concrete is divided into dry sprayig process
With wet shot method.Dry sprayig process concrete-spraying technology is since big with dust, springback capacity is big, sprayed concrete strength is unevenly distributed
The disadvantages of, and gradually replaced by Wet Shotcrete Technology.In recent years, popularizing with Wet Shotcrete Technology, liquid speed
Solidifying agent is come into being, but these accelerators are in strong basicity mostly, and when use constitutes a threat to the personal safety of construction personnel, and
Make the problems such as late strength of concrete loss is big, durability is poor, injection springback capacity is big.
Alkali-free quick-coagulant solve conventional alkaline accelerator alkali content height initiation a series of problems, have safety and environmental protection,
It is corrosion-free, durability is good, mechanical property is good, injection springback capacity it is small the advantages that.Domestic alkali-free quick-coagulant technology have developed rapidly, especially
Nearly 2 years, a large amount of alkali-free quick-coagulant patent was applied, and technology development reaches its maturity.
Wang Heng patent CN1970487A discloses a kind of powdery alkali-free quick-coagulant, but the accelerator use sodium metasilicate,
Sodium oxide molybdena equivalent is greater than 1% in sodium aluminate.According in GB/T35159-2017 " gunite concrete accelerator " to alkali-free rapid hardening
The definition of agent, the patent are simultaneously not belonging to alkali-free quick-coagulant.Pan Zhihua, Xu Yongdong, Wu Chengzhen, et al. cement alkali-free quick-coagulant
Study [J] Nanjing University of Technology journal (natural science edition), 1997,19 (02): 63-67. is mentioned with alumina, lime stone, a small amount of
Cosolvent is raw material, calcines at 1330 DEG C or so, can synthesize cement minerals type alkali-free quick-coagulant, but the powder accelerator is not
Have water solubility, therefore is only used for dry sprayig process gunite concrete.
The patent application of alkali-free liquid accelerator also has, as CN1974466A disclose a kind of gunite concrete liquid without
Alkali accelerator.CN103553406A discloses a kind of alkali-free chlorine-free liquid accelerator based on industrial polymerisation aluminum sulfate.But these
There are many problems from the point of view of stability, economy, product radiation scope in alkali-free liquid accelerator patent application.That is, at present
Alkali-free liquid accelerator product there are also biggish limitations.
1) stability is poor, unsuitable long term storage.There is a large amount of aluminium ion in existing alkali-free quick-coagulant, aluminium ion is water-soluble
It can occur to hydrolyze coagulation in liquid, irreversible precipitating crystallization can be occurred by leading to accelerator when in use.Such as United States Patent (USP)
A kind of alkali-free liquid accelerator disclosed in (US2012/0085266 A1), stationary phase are only one month；United States Patent (USP)
(US8118930B2) a kind of alkali-free liquid accelerator disclosed in, stationary phase are 8 weeks.Stationary phase is too short, is transporting and is using too late
When under conditions of, accelerator once occur it is irreversible precipitating will be unable to reuse.
2) packing cost is high.Since alkali-free quick-coagulant pH value is in acidity mostly, chemically reacted with container made of iron, therefore
It is general significantly to be increased using 200 liters or 1000 liters of plastic barrel packagings, the packing cost of alkali-free liquid accelerator.
3) due to the particular/special requirement of packing cost, so that significantly increasing for transportation cost is brought, current alkali-free liquid
In accelerator generally containing 30%~60% water, this undoubtedly increases the transportation cost of accelerator product；This point defect causes
The radiation scope of product is small, it is difficult to which the use scope for expanding product has seriously affected accelerator in the development and popularization of construction industry.
Therefore, it finds a kind of while meeting the alkali-free mark for 1) reaching GB/T35159-2017 " gunite concrete accelerator "
It is quasi-；2) normality is solid-state powder raw material, is needed convenient for long-distance transport；3) there is extraordinary water solubility when using；4) after use
The accelerator of 4 points of the stability requirements with superelevation, becomes technical problem urgently to be solved.
Summary of the invention
The present invention provides a kind of water-soluble powdery alkali-free precisely in order to solve above-mentioned alkali-free liquid accelerator problems faced
Accelerator and its method of preparation, while providing the application method of the water-soluble powder accelerator.Accelerator of the invention is full
Above-mentioned 4 points of the technical requirements of foot, can generally use in building trade extensively, to meet more harsh construction industry technology
It needs.
The present invention adopts the following technical scheme that realization.
A kind of water-soluble powdery alkali-free quick-coagulant, the raw material and each component mass percent of accelerator of the invention are as follows:
Aluminum sulfate 45%~52%；
Lithium metasilicate 1%~5%；
Manganese fluosilicate 5%~10%；
PH adjusting agent 1%~3%；
Suspension stabilizer 0.5%~1%；
Surplus is water, and total amount supplies 100%.
It is further that the content of aluminium oxide is 15.6~17% in aluminum sulfate of the present invention, and moisture is no more than 4%.
It is further that the solid content of lithium metasilicate of the present invention is 20%~30%.
It is further that manganese content is no less than 8% in manganese fluosilicate of the present invention, and fluorine content is no less than 50%, and moisture is not
Greater than 1%.
It is further that pH adjusting agent of the present invention is formic acid or tartaric acid.
It is further that suspension stabilizer of the present invention is sepiolite
A kind of preparation method of water-soluble powdery alkali-free quick-coagulant, preparation method of the invention the following steps are included:
1) it adds water in reaction kettle, is warming up to 65 DEG C~85 DEG C, then sequentially adds aluminum sulfate, lithium metasilicate and fluosilicic acid
Manganese persistently stirs 0.5h~1h；
2) pH adjusting agent is added dropwise into step (1) resulting material with constant flow pump, time for adding is controlled in 0.5h~1h；
3) under conditions of keeping the temperature 65 DEG C~85 DEG C, 1h~1.5h is persistently stirred；
4) suspension stabilizer is added, starts high-speed shearing emulsion machine, revolving speed is between 6000r/min~8000r/min, cream
Change time 0.5h~1h, obtains alkali-free liquid accelerator；
5) step (4) resulting material is obtained into white powder alkali-free quick-coagulant by spray drying tower.
It is further that spray drying pressure is 0.1~0.3 times of standard atmospheric pressure, spray drying chamber in step (5) of the present invention
Interior temperature is 250 DEG C~300 DEG C.
Involved raw material and each component mass percent in a kind of preparation method of above-mentioned water-soluble powdery alkali-free quick-coagulant are as follows:
Aluminum sulfate 45%~52%；
Lithium metasilicate 1%~5%；
Manganese fluosilicate 5%~10%；
PH adjusting agent 1%~3%；
Suspension stabilizer 0.5%~1%；
Surplus is water, and total amount supplies 100%.
A kind of preparation method of water-soluble powdery alkali-free quick-coagulant, white powder alkali-free quick-coagulant made from step 5 make
It is that mass ratio 1:0.8~1:1.5 of white powder alkali-free quick-coagulant and water is configured to alkali-free liquid accelerator with method；It is spraying
It penetrates in concrete construction and uses, volume is the 4%~6% of cement quality.
The invention has the benefit that 1) product of the invention -- water-soluble powdery alkali-free quick-coagulant has alkali-free corrosion-free
The advantages of: water-soluble powdery alkali-free quick-coagulant alkali content of the present invention reaches GB/T35159-2017 " gunite concrete less than 1%
With accelerator " alkali-free standard；The possibility that alkali occurs for gunite concrete is greatly reduced, it is resistance to improve gunite concrete
Long property；In addition, being different from alkaline accelerator, alkali-free quick-coagulant pH value is weakly acidic, will not corrode worker's body, to operator
Personal safety and health care belt come very big improvement.2) product of the invention has superhigh intensity: rapid hardening prepared by the present invention
Agent, mortar 1d intensity is up to 17MPa or more, and later strength will not only lose, and also increases, wherein mortar 28d pressure resistance
Degree is than up to 110% or more, and strength retention ratio is 105% or more within 90 days.For in gunite concrete, in early stage with higher
While intensity, moreover it is possible to guarantee that later strength increased, be safe to tunnel support structure.3) product of the invention is stablized
Property it is fabulous, be convenient for long term storage: water-soluble powdery alkali-free quick-coagulant of the present invention be solid, powdery, avoid liquid accelerator finished product
The phenomenon that precipitating even crystallizes is easy to produce during transport, storage.It is stored 1 year in warehouse, reusing does not influence its property
Energy.4) packing cost is greatly reduced: for the present invention using adding the Polywoven Bag of waterproof plastic inner bag to pack, packing cost per ton is remote
Far below the packing cost of alkali-free liquid accelerator.5) transportation cost is greatly reduced.Water-soluble powdery alkali-free quick-coagulant of the present invention
It is per ton that water can be added to prepare 1.8~2.5 tons of alkali-free liquid accelerator finished products.It is compared with conventional alkali-free liquid accelerator, this hair
Bright product is reducing 40~60% transportation cost.6) dissolubility is good: water-soluble powdery alkali-free quick-coagulant of the invention is in water
In dissolubility it is good, under room temperature site environment, proportionally add water and stir at once become alkali-free liquid accelerator.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.
A kind of water-soluble powdery alkali-free quick-coagulant, the raw material and each component mass percent of accelerator of the invention are as follows: sulphur
Sour aluminium 45%~52%；Lithium metasilicate 1%~5%；Manganese fluosilicate 5%~10%；PH adjusting agent 1%~3%；Suspension stabilizer
0.5%~1%；Surplus is water, and total amount supplies 100%.
It is further that the content of aluminium oxide is 15.6~17% in aluminum sulfate of the present invention, and moisture is no more than 4%.
It is further that the solid content of lithium metasilicate of the present invention is 20%~30%.
It is further that manganese content is no less than 8% in manganese fluosilicate of the present invention, and fluorine content is no less than 50%, and moisture is not
Greater than 1%.
It is further that pH adjusting agent of the present invention is formic acid or tartaric acid.
It is further that suspension stabilizer of the present invention is sepiolite
A kind of preparation method of water-soluble powdery alkali-free quick-coagulant, preparation method of the invention the following steps are included:
1) it adds water in reaction kettle, is warming up to 65 DEG C~85 DEG C, then sequentially adds aluminum sulfate, lithium metasilicate and fluosilicic acid
Manganese persistently stirs 0.5h~1h；
2) pH adjusting agent is added dropwise into step (1) resulting material with constant flow pump, time for adding is controlled in 0.5h~1h；
3) under conditions of keeping the temperature 65 DEG C~85 DEG C, 1h~1.5h is persistently stirred；
4) suspension stabilizer is added, starts high-speed shearing emulsion machine, revolving speed is between 6000r/min~8000r/min, cream
Change time 0.5h~1h, obtains alkali-free liquid accelerator；
5) step (4) resulting material is obtained into white powder alkali-free quick-coagulant by spray drying tower.
It is further that spray drying pressure is 0.1~0.3 times of standard atmospheric pressure, spray drying chamber in step (5) of the present invention
Interior temperature is 250 DEG C~300 DEG C.
Involved raw material and each component mass percent in a kind of preparation method of above-mentioned water-soluble powdery alkali-free quick-coagulant are as follows:
Aluminum sulfate 45%~52%；Lithium metasilicate 1%~5%；Manganese fluosilicate 5%~10%；PH adjusting agent 1%~3%；Suspension stabilizer
0.5%~1%；Surplus is water, and total amount supplies 100%.
Specific experiment compares in detail
Percentage of the present invention is mass percent unless otherwise instructed.The raw material can unless otherwise instructed
From open business by way of obtaining.
Embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and specific
Operating process embodiment will be helpful to understand the present invention, but protection scope of the present invention is not limited to following embodiments.
The composition of raw materials of embodiment 1-5 water-soluble powdery alkali-free quick-coagulant and comparative example is as shown in table 1, preparation method such as table
Shown in 2:
The composition of raw materials of 1 embodiment 1-5 water-soluble powdery alkali-free quick-coagulant of table
The preparation method parameter of 2 embodiment 1-5 water-soluble powdery alkali-free quick-coagulant of table
Comparative example uses the alkali-free liquid accelerator of 102173630 A method of application publication number CN preparation.
Application examples
The water-soluble powder accelerator for preparing embodiment 1-5 and water 1:0.8~1:1.5 in mass ratio are configured to conventional nothing
Alkali liquid quick-setting agent, and be added in cement paste or cement mortar sample with accounting for the amount of the 4%-6% of cement weight, according to GB/
The standard testing setting time of T35159-2017 " gunite concrete accelerator " and compression strength, the performance of the standard requirements
Index is shown in Table 3.It is control with the alkali-free quick-coagulant (MEYCO SA160) that comparative example and external performance are more advanced, with not plus any
Accelerator is blank.
Table 3 adds the net slurry of accelerator and the performance requirement of mortar
4 correlated performance detection result of table
Test result is as shown in table 4, and each embodiment alkali content is respectively less than 1%, belongs to alkali-free quick-coagulant；According to GB/
The standard analysis of T35159-2017 " gunite concrete accelerator ", alkali-free quick-coagulant volume prepared by the present invention can 4%
Meet standard requirements.In addition, the characteristics of alkali-free quick-coagulant prepared by the present invention is intensity height, and in embodiment 5, mortar 1d resistance to compression
Intensity is up to 20.5MPa, and 28d compressive strength rate is up to 115%, 90d strength retention ratio and is more up to 123%.
In a comparative example, prepared accelerator setting time is qualified, but 1d compression strength, 28d compressive strength rate, 90d
Three indexs of strength retention ratio are below embodiment.And as control, commercially available alkali-free quick-coagulant MEYCO SA160 volume is up to
8%-10% can just be met the requirements.In contrast, alkali-free quick-coagulant volume prepared by the present invention is lower, compression strength is higher, says
It is better than same kind of products at abroad (MEYCO SA160) in bright alkali-free quick-coagulant performance prepared by the present invention.
Influence of the 5 water-soluble powdery alkali-free quick-coagulant period of storage of table to accelerator performance
Experimental result is as shown in table 5, shows that water-soluble powdery alkali-free quick-coagulant of the invention makes after storing one-year age
With the properties such as setting time and intensity differ very little with the properties of product just produced.Absolutely prove this hair
The bright period of storage with overlength.
The adaptability of alkali-free quick-coagulant and cement that 6 water-soluble powdery alkali-free quick-coagulant of table is prepared
As can be seen from Table 6, alkali-free quick-coagulant of the present invention can make different brands and different type at low dosage
Cement meet the construction requirement of injection concrete, extremely strong adaptability is shown to engineered cementitious.
It is above-described be only some embodiments of the invention (since formula of the invention belongs to numberical range, therefore
Embodiment cannot exhaustion, protection scope documented by the present invention wants the point range to be with numberical range and other technologies of the invention
It is quasi-), well known particular content or common sense do not describe excessively herein in scheme.It should be pointed out that above-described embodiment is not with any side
The formula limitation present invention, it is for those skilled in the art, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.This application claims protection scope should be with the content of its claim
Standard, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (10)
1. a kind of water-soluble powdery alkali-free quick-coagulant, which is characterized in that the raw material and each component mass percent of the accelerator are as follows:
Aluminum sulfate 45%~52%；
Lithium metasilicate 1%~5%；
Manganese fluosilicate 5%~10%；
PH adjusting agent 1%~3%；
Suspension stabilizer 0.5%~1%；
Surplus is water, and total amount supplies 100%.
2. a kind of water-soluble powdery alkali-free quick-coagulant according to claim 1, which is characterized in that oxygen in the aluminum sulfate
The content for changing aluminium is 15.6~17%, and moisture is no more than 4%.
3. a kind of water-soluble powdery alkali-free quick-coagulant according to claim 1, which is characterized in that the lithium metasilicate is consolidated
Content is 20%~30%.
4. a kind of water-soluble powdery alkali-free quick-coagulant according to claim 1, which is characterized in that in the manganese fluosilicate
Manganese content is no less than 8%, and fluorine content is no less than 50%, and moisture is not more than 1%.
5. a kind of water-soluble powdery alkali-free quick-coagulant according to claim 1, which is characterized in that the pH adjusting agent is
Formic acid or tartaric acid.
6. a kind of water-soluble powdery alkali-free quick-coagulant according to claim 1, which is characterized in that the suspension stabilizer
For sepiolite.
7. a kind of preparation method of water-soluble powdery alkali-free quick-coagulant, which is characterized in that the preparation method the following steps are included:
1) it adds water in reaction kettle, is warming up to 65 DEG C~85 DEG C, then sequentially adds aluminum sulfate, lithium metasilicate and manganese fluosilicate,
Persistently stir 0.5h~1h；
2) pH adjusting agent is added dropwise into step (1) resulting material with constant flow pump, time for adding is controlled in 0.5h~1h；
3) under conditions of keeping the temperature 65 DEG C~85 DEG C, 1h~1.5h is persistently stirred；
4) suspension stabilizer is added, starts high-speed shearing emulsion machine, revolving speed is between 6000r/min~8000r/min, when emulsification
Between 0.5h~1h, obtain alkali-free liquid accelerator；
5) step (4) resulting material is obtained into white powder alkali-free quick-coagulant by spray drying tower.
8. a kind of preparation method of water-soluble powdery alkali-free quick-coagulant according to claim 7, which is characterized in that step
(5) spray drying pressure is 0.1~0.3 times of standard atmospheric pressure in, and being spray-dried indoor temperature is 250 DEG C~300 DEG C.
9. a kind of preparation method of water-soluble powdery alkali-free quick-coagulant according to claim 7 or 8, which is characterized in that should
Involved raw material and each component mass percent in preparation method are as follows:
Aluminum sulfate 45%~52%；
Lithium metasilicate 1%~5%；
Manganese fluosilicate 5%~10%；
PH adjusting agent 1%~3%；
Suspension stabilizer 0.5%~1%；
Surplus is water, and total amount supplies 100%.
10. according to a kind of preparation method of water-soluble powdery alkali-free quick-coagulant of claim 7 or 8, which is characterized in that step 5
The application method of white powder alkali-free quick-coagulant obtained is mass ratio 1:0.8~1 of white powder alkali-free quick-coagulant and water:
1.5 are configured to alkali-free liquid accelerator；It is used in construction of shotcrete, volume is the 4%~6% of cement quality.
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| CN110510900A (en) * | 2019-09-12 | 2019-11-29 | 云南凯威特新材料股份有限公司 | A kind of modified villiaumite and its method for preparing gunite concrete low-alkali liquid quick-setting agent |
| CN111056762A (en) * | 2019-12-13 | 2020-04-24 | 武汉比邻科技发展有限公司 | Alkali-free liquid accelerator and preparation method thereof |
| CN111499248A (en) * | 2020-05-22 | 2020-08-07 | 山西海裕隆建材有限公司 | High-performance alkali-free liquid accelerator special for moderate-heat low-heat cement and preparation method thereof |
| CN111574093A (en) * | 2020-05-22 | 2020-08-25 | 山西海裕隆建材有限公司 | High-performance alkali-free liquid accelerator and preparation method thereof |
| CN111939853A (en) * | 2020-07-06 | 2020-11-17 | 江苏奥莱特新材料股份有限公司 | Production device and method of solid alkali-free setting accelerator |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
| CN112691632A (en) * | 2021-01-22 | 2021-04-23 | 广西新广建新材料有限公司 | Alkali-free accelerator production system |
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| CN113264711A (en) * | 2021-06-28 | 2021-08-17 | 山西佳维新材料股份有限公司 | Powder alkali-free accelerator and preparation method, use method and application thereof |
| CN113548825A (en) * | 2021-07-30 | 2021-10-26 | 江苏奥莱特新材料股份有限公司 | Solid master batch of fluoride-free alkali-free liquid accelerator and preparation and use methods thereof |
| CN113582573A (en) * | 2021-09-01 | 2021-11-02 | 多氟多新材料股份有限公司 | Accelerating agent and preparation method and application thereof |
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| CN110510900A (en) * | 2019-09-12 | 2019-11-29 | 云南凯威特新材料股份有限公司 | A kind of modified villiaumite and its method for preparing gunite concrete low-alkali liquid quick-setting agent |
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| CN111499248A (en) * | 2020-05-22 | 2020-08-07 | 山西海裕隆建材有限公司 | High-performance alkali-free liquid accelerator special for moderate-heat low-heat cement and preparation method thereof |
| CN111574093A (en) * | 2020-05-22 | 2020-08-25 | 山西海裕隆建材有限公司 | High-performance alkali-free liquid accelerator and preparation method thereof |
| CN111939853A (en) * | 2020-07-06 | 2020-11-17 | 江苏奥莱特新材料股份有限公司 | Production device and method of solid alkali-free setting accelerator |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
| CN112691632A (en) * | 2021-01-22 | 2021-04-23 | 广西新广建新材料有限公司 | Alkali-free accelerator production system |
| CN112897919A (en) * | 2021-01-22 | 2021-06-04 | 广西新广建新材料有限公司 | Liquid accelerator and preparation method thereof |
| CN113264711A (en) * | 2021-06-28 | 2021-08-17 | 山西佳维新材料股份有限公司 | Powder alkali-free accelerator and preparation method, use method and application thereof |
| CN113548825A (en) * | 2021-07-30 | 2021-10-26 | 江苏奥莱特新材料股份有限公司 | Solid master batch of fluoride-free alkali-free liquid accelerator and preparation and use methods thereof |
| CN113582573A (en) * | 2021-09-01 | 2021-11-02 | 多氟多新材料股份有限公司 | Accelerating agent and preparation method and application thereof |
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