CN109020292A - A kind of preparation method of the enhanced alkali-free liquid accelerator of environmental protection - Google Patents
A kind of preparation method of the enhanced alkali-free liquid accelerator of environmental protection Download PDFInfo
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- CN109020292A CN109020292A CN201810937456.9A CN201810937456A CN109020292A CN 109020292 A CN109020292 A CN 109020292A CN 201810937456 A CN201810937456 A CN 201810937456A CN 109020292 A CN109020292 A CN 109020292A
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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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- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a kind of preparation methods of enhanced alkali-free liquid accelerator of environmental protection.Preparation method of the invention is used for preparing the synthesis of alkali-free liquid accelerator by carrying out being copolymerized obtained suspension stabilizer by the acylated obtained acylate of maleic anhydride and urea, then with acrylamide and acrylic acid.By introducing maleic anhydride and the acylated obtained suspension stabilizer with amide structure of urea, the coherency of liquid accelerator is improved, the generation of precipitating is effectively inhibited, substantially increases the stability of mother liquor storage, stability can reach 15 months or more；And amide structure and urea can promote the development of early strength, to promote the early strength of concrete.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of preparation of the enhanced alkali-free liquid accelerator of environmental protection
Method.
Background technique
With the acceleration of large-scale mining, tunnel excavation and network of highways and railway network engineering construction, so that fast
Solidifying agent dosage greatly increases, and to the performance quality of accelerator, higher requirements are also raised.Conventional powdered accelerator product can only
It constructs applied to dry pressure spray process, and that there are solution rates is slow, is not easy the defects of being uniformly dispersed.
Currently, the development trend of gunite concrete accelerator is changed from traditional solid powdery to liquid, and
Low alkali, alkali-free just gradually replace traditional accelerator.There are alkali content height, later strength for domestic currently used liquid accelerator
The problems such as loss is big, maturing is impervious poor.The high environmental pollution of alkali content is serious, and big, coagulation is injured to construction personnel
The problems such as native unstable quality, develops a kind of environmental protection increasing to improve injury of the accelerator to constructor and concrete quality
Strong type alkali-free liquid accelerator is of great significance.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of enhanced alkali-free liquid accelerator of environmental protection.
Technical scheme is as follows:
A kind of preparation method of the enhanced alkali-free liquid accelerator of environmental protection, includes the following steps:
(1) acylation reaction: being first added maleic anhydride and urea in reaction unit, under nitrogen protection, is warming up to 60 DEG C, then
Catalyst is added, is to slowly warm up to 70~90 DEG C, 1.5~4h of constant temperature, cooling obtains acylate, and maleic anhydride and urea rub
You are than being 1: 1~2；
(2) preparation of suspension stabilizer: by above-mentioned acylate, acrylamide aqueous solution, acrylic acid aqueous solution, persulfuric acid
Aqueous ammonium and molecular weight regulator aqueous solution, which instill in water, to be reacted, and reaction temperature is 50~90 DEG C, time for adding 1.0
~4.0h keeps the temperature 0~3.0h, obtains suspension stabilizer；The total amount of water used in the step makes the mass concentration of the suspension stabilizer
It is 5~40%, the mass ratio of acylate, acrylamide solution and acrylic acid solution is 1: 1~2: 0.2~1；
(3) preparation of reinforcing agent: hydramine and ethanedioic acid are reacted, and 50~90 DEG C of reaction temperature, add catalyst,
Reaction time is 1~4h, obtains the first mixture；Glycerine is added into the first mixture again to be reacted, reaction temperature 70
~90 DEG C, reaction time 1-4h obtains reinforcing agent；The molar ratio of hydramine, ethanedioic acid and glycerine is 1: 1: 0.4~1.2；On
Stating hydramine is monoethanolamine, diethanol amine, triethanolamine and triisopropanolamine, diethanol monoisopropanolamine and monoethanol diisopropyl
At least one of hydramine；
Catalyst in above-mentioned steps (1) and step (3) is p-methyl benzenesulfonic acid and/or the concentrated sulfuric acid；
(4) by weight, by suspension stabilizer made from 0.2~3.0 part of step (2) and 1~10 part of pH adjusting agent
It is added to the water and is stirred, reaction temperature is 10~60 DEG C, adds 30~60 parts of aluminum sulfate, adds 1 after 0.2~2.0h
Reinforcing agent made from~20 parts of steps (3) reacts 0.2~1h, obtains the enhanced alkali-free liquid accelerator of environmental protection；The step institute
The mass concentration for making the enhanced alkali-free liquid accelerator of the environmental protection with the total amount of water is 40~70%.
In a preferred embodiment of the invention, in the step (1), the dosage of the catalyst is maleic anhydride
With the 0.3~0.6% of urea gross mass.
In a preferred embodiment of the invention, in the step (2), the dosage of the ammonium persulfate is acylated produces
The 0.5~3.0% of the gross mass of solute in object, acrylamide solution and acrylic acid solution,
In a preferred embodiment of the invention, in the step (2), the dosage of the molecular weight regulator is acyl
Change the 0.2~3.0% of the gross mass of product, acrylamide solution and the solute in acrylic acid solution.
In a preferred embodiment of the invention, in the step (3), the dosage of the catalyst is hydramine and second
The 0.3~4.0% of the gross mass of diacid.
It is further preferred that the molecular weight regulator is thioacetic acid, mercaptopropionic acid, mercaptoethanol, isopropanol and ten
At least one of two mercaptan.
It is further preferred that the pH adjusting agent be the concentrated sulfuric acid, p-methyl benzenesulfonic acid, citric acid, tartaric acid, salicylic acid and
At least one of hydrofluoric acid.
The beneficial effects of the present invention are:
1, preparation method of the invention is by by the acylated obtained acylate of maleic anhydride and urea, then with acrylamide and
Acrylic acid carries out being copolymerized obtained suspension stabilizer, is used for preparing the synthesis of alkali-free liquid accelerator.By introducing maleic acid
Acid anhydride and the acylated obtained suspension stabilizer with amide structure of urea, improve the coherency of liquid accelerator, effective to inhibit
The generation of precipitating, substantially increases the stability of mother liquor storage, and stability can reach 15 months or more；And amide structure
It can promote the development of early strength with urea, to promote the early strength of concrete.
2, reinforcing agent first is made with glycerine esterification again with after ethanedioic acid esterification by hydramine in preparation method of the present invention, then will
It applies in the synthesis of alkali-free liquid accelerator, can be improved the early strength and later strength of concrete.
3, the enhanced alkali-free liquid accelerator of environmental protection prepared by the present invention is non-corrosive to construction worker's skin, to production ring
Border is pollution-free, belongs to green product without environmental pollution.
Specific embodiment
Technical solution of the present invention is further explained and described below by way of specific embodiment.
Embodiment 1
(1) acylation reaction: being first added 100.00g maleic anhydride and 65.00g urea in reaction unit, under nitrogen protection,
60 DEG C are warming up to, 0.50g p-methyl benzenesulfonic acid is added, is to slowly warm up to 75 DEG C, constant temperature 2.0h, cooling obtains acylate；
(2) preparation of suspension stabilizer: by 100.00g acylate, acrylamide aqueous solution (wherein acrylic acid
130.00g and water 150.00g), acrylic acid aqueous solution (wherein acrylic acid 30.00g and water 150.00g), ammonium persulfate aqueous solution
(wherein ammonium persulfate 2.20g and water 150.00g) and thioacetic acid aqueous solution (wherein thioacetic acid 1.60g and water 150.00g),
It instills in 500.00g water and is reacted, reaction temperature is 70 DEG C, time for adding 2.0h, keeps the temperature 1.0h, obtains suspension stabilizer；
(3) preparation of reinforcing agent: 105.00g diethanol amine and 90.00g ethanedioic acid are reacted, and 60 DEG C of reaction temperature,
1.00g p-methyl benzenesulfonic acid is added, reaction time 2h obtains the first mixture；46.00g is added into the first mixture again
Glycerine is reacted, and 70 DEG C of reaction temperature, reaction time 3.0h obtains reinforcing agent；
(4) suspension stabilizer made from 1.00g step (2) and the 3.00g concentrated sulfuric acid are added in 50.00g water and are stirred
It mixes, reaction temperature is 40 DEG C, adds 40.00g aluminum sulfate, reinforcing agent made from 10.00g step (3) is added after 1.0h, instead
0.5h is answered, the enhanced alkali-free liquid accelerator of environmental protection is obtained.
Embodiment 2
(1) acylation reaction: being first added 100.00g maleic anhydride and 70.00g urea in reaction unit, under nitrogen protection,
60 DEG C are warming up to, the 0.70g concentrated sulfuric acid is added, is to slowly warm up to 75 DEG C, constant temperature 3.0h, cooling obtains acylate；
(2) preparation of suspension stabilizer: by 100.00g acylate, acrylamide aqueous solution (wherein acrylic acid
140.00g and water 150.00g), acrylic acid aqueous solution (wherein acrylic acid 35.00g and water 150.00g), ammonium persulfate aqueous solution
(wherein ammonium persulfate 1.70g and water 150.00g) and mercaptopropionic acid aqueous solution (wherein mercaptopropionic acid 1.70g and water 150.00g),
It instills in 500.00g water and is reacted, reaction temperature is 70 DEG C, time for adding 3.0h, keeps the temperature 2.0h, obtains suspension stabilizer；
(3) preparation of reinforcing agent: 61.00g monoethanolamine and 90.00g ethanedioic acid are reacted, and 70 DEG C of reaction temperature,
The 0.80g concentrated sulfuric acid is added, reaction time 3.0h obtains the first mixture；55.00g third is added into the first mixture again
Triol is reacted, and 80 DEG C of reaction temperature, reaction time 2.0h obtains reinforcing agent；
(4) by suspension stabilizer made from 2.00g step (2) and 5.00g p-methyl benzenesulfonic acid be added in 50.00g water into
Row stirring, reaction temperature are 50 DEG C, add 50.00g aluminum sulfate, and 12.00g step (3) enhancing obtained is added after 1.5h
Agent reacts 0.5h, obtains the enhanced alkali-free liquid accelerator of environmental protection.
Embodiment 3
(1) acylation reaction: being first added 100.00g maleic anhydride and 66.00g urea in reaction unit, under nitrogen protection,
60 DEG C are warming up to, the 0.60g concentrated sulfuric acid is added, is to slowly warm up to 80 DEG C, constant temperature 2.5h, cooling obtains acylate；
(2) preparation of suspension stabilizer: by 100.00g acylate, acrylamide aqueous solution (wherein acrylic acid
150.00g and water 150.00g), acrylic acid aqueous solution (wherein acrylic acid 40.00g and water 150.00g), ammonium persulfate aqueous solution
(wherein ammonium persulfate 2.80g and water 150.00g) and mercaptoethanol aqueous solution (wherein mercaptoethanol 3.00g and water 150.00g),
It instills in 520.00g water and is reacted, reaction temperature is 80 DEG C, time for adding 2.0h, keeps the temperature 3.0h, obtains suspension stabilizer；
(3) preparation of reinforcing agent: 149.00g triethanolamine and 90.00g ethanedioic acid are reacted, and 60 DEG C of reaction temperature,
The 1.20g concentrated sulfuric acid is added, reaction time 1.5h obtains the first mixture；74.00g third is added into the first mixture again
Triol is reacted, and 75 DEG C of reaction temperature, reaction time 2.0h obtains reinforcing agent；
(4) by suspension stabilizer made from 1.50g step (2) and 4.00g p-methyl benzenesulfonic acid be added in 50.00g water into
Row stirring, reaction temperature are 45 DEG C, add 35.00g aluminum sulfate, and 8.00g step (3) enhancing obtained is added after 1.0h
Agent reacts 0.5h, obtains the enhanced alkali-free liquid accelerator of environmental protection.
Embodiment 4
(1) acylation reaction: being first added 100.00g maleic anhydride and 80.00g urea in reaction unit, under nitrogen protection,
60 DEG C are warming up to, 0.80g p-methyl benzenesulfonic acid is added, is to slowly warm up to 80 DEG C, constant temperature 1.5h, cooling obtains acylate；
(2) preparation of suspension stabilizer: by 100.00g acylate, acrylamide aqueous solution (wherein acrylic acid
138.00g and water 150.00g), acrylic acid aqueous solution (wherein acrylic acid 50.00g and water 150.00g), ammonium persulfate aqueous solution
(wherein ammonium persulfate 2.00g and water 150.00g) and isopropanol water solution (wherein isopropanol 2.60g and water 150.00g) instills
It is reacted in 520.00g water, reaction temperature is 60 DEG C, time for adding 4.0h, keeps the temperature 2.0h, obtains suspension stabilizer；
(3) preparation of reinforcing agent: 191.00g triisopropanolamine and 90.00g ethanedioic acid are reacted, reaction temperature 75
DEG C, the 1.40g concentrated sulfuric acid is added, reaction time 2.5h obtains the first mixture；65.00g is added into the first mixture again
Glycerine is reacted, and 85 DEG C of reaction temperature, reaction time 1.0h obtains reinforcing agent；
(4) suspension stabilizer made from 2.00g step (2) and 2.00g citric acid are added in 50.00g water and are stirred
It mixes, reaction temperature is 30 DEG C, adds 50.00g aluminum sulfate, reinforcing agent made from 13.00g step (3) is added after 0.5h, instead
0.5h is answered, the enhanced alkali-free liquid accelerator of environmental protection is obtained.
Embodiment 5
(1) 100.00g maleic anhydride and 100.00g urea, nitrogen protection first acylation reaction: are added in reaction unit
Under, 60 DEG C are warming up to, the 1.00g concentrated sulfuric acid is added, is to slowly warm up to 85 DEG C, constant temperature 3.5h, cooling obtains acylate；
(2) preparation of suspension stabilizer: by 100.00g acylate, acrylamide aqueous solution (wherein acrylic acid
160.00g and water 150.00g), acrylic acid aqueous solution (wherein acrylic acid 60.00g and water 150.00g), ammonium persulfate aqueous solution
(wherein ammonium persulfate 2.60g and water 150.00g) and thioacetic acid aqueous solution (wherein thioacetic acid 2.50g and water 150.00g),
It instills in 600.00g water and is reacted, reaction temperature is 65 DEG C, time for adding 3.0h, keeps the temperature 1.0h, obtains suspension stabilizer；
(3) preparation of reinforcing agent: 163.20g diethanol monoisopropanolamine and 90.00g ethanedioic acid are reacted, reaction
80 DEG C of temperature, the 1.30g concentrated sulfuric acid is added, reaction time 3.0h obtains the first mixture；It is added again into the first mixture
90.00g glycerine is reacted, and 80 DEG C of reaction temperature, reaction time 2.0h obtains reinforcing agent；
(4) suspension stabilizer made from 1.00g step (2) and 6.00g tartaric acid are added in 50.00g water and are stirred
It mixes, reaction temperature is 20 DEG C, adds 45.00g aluminum sulfate, reinforcing agent made from 15.00g step (3) is added after 1.0h, instead
0.5h is answered, the enhanced alkali-free liquid accelerator of environmental protection is obtained.
The enhanced alkali-free liquid accelerator of environmental protection obtained by embodiment 1 to embodiment 5 is tested, conch is selected
P.O42.5 ordinary portland cement.According to JC477-2005 " gunite concrete accelerator " to the enhanced alkali-free of gained environmental protection
Liquid accelerator carries out cement paste condensed water time and strength of cement mortar test.Wherein accelerator dosage is according to cement weight
Percentage calculate.
The test of cement paste setting time
Cement 400
Water 160
Strength of cement mortar test
Cement 900
Normal sand 1350
Water 450
Accelerator is added in cement slurry according to the 5% of cement weight, while above-mentioned water consumption contains liquid accelerator
Contained in water.As a comparison with presently commercially available alkali-free liquid accelerator (sample 1), cement paste setting time, sand have been carried out
Slurry intensity and stability are tested.Test result such as table 1 and 2.
1 cement paste setting time test result of table
The test of 2 strength of cement mortar of table and stability
Presetting period of the enhanced alkali-free liquid accelerator of environmental protection of the invention and when final set as can be seen from Table 1 and Table 2
Between it is all more shorter than commercially available alkali-free liquid accelerator, 1d compression strength and 28d compressive strength rate are higher, and stability is more preferable.
Those of ordinary skill in the art still are able to it is found that when technical solution of the present invention changes in following ranges
To same as the previously described embodiments or similar technical effect, protection scope of the present invention is still fallen within:
A kind of preparation method of the enhanced alkali-free liquid accelerator of environmental protection, includes the following steps:
(1) acylation reaction: being first added maleic anhydride and urea in reaction unit, under nitrogen protection, is warming up to 60 DEG C, then
Catalyst is added, is to slowly warm up to 70~90 DEG C, 1.5~4h of constant temperature, cooling obtains acylate, and maleic anhydride and urea rub
You are than being 1: 1~2；
(2) preparation of suspension stabilizer: by above-mentioned acylate, acrylamide aqueous solution, acrylic acid aqueous solution, persulfuric acid
Aqueous ammonium and molecular weight regulator aqueous solution, which instill in water, to be reacted, and reaction temperature is 50~90 DEG C, time for adding 1.0
~4.0h keeps the temperature 0~3.0h, obtains suspension stabilizer；The total amount of water used in the step makes the mass concentration of the suspension stabilizer
It is 5~40%, the mass ratio of acylate, acrylamide solution and acrylic acid solution is 1: 1~2: 0.2~1；
(3) preparation of reinforcing agent: hydramine and ethanedioic acid are reacted, and 50~90 DEG C of reaction temperature, add catalyst,
Reaction time is 1~4h, obtains the first mixture；Glycerine is added into the first mixture again to be reacted, reaction temperature 70
~90 DEG C, reaction time 1-4h obtains reinforcing agent；The molar ratio of hydramine, ethanedioic acid and glycerine is 1: 1: 0.4~1.2；On
Stating hydramine is monoethanolamine, diethanol amine, triethanolamine and triisopropanolamine, diethanol monoisopropanolamine and monoethanol diisopropyl
At least one of hydramine；
Catalyst in above-mentioned steps (1) and step (3) is p-methyl benzenesulfonic acid and/or the concentrated sulfuric acid；
(4) by weight, by suspension stabilizer made from 0.2~3.0 part of step (2) and 1~10 part of pH adjusting agent
It is added to the water and is stirred, reaction temperature is 10~60 DEG C, adds 30~60 parts of aluminum sulfate, adds 1 after 0.2~2.0h
Reinforcing agent made from~20 parts of steps (3) reacts 0.2~1h, obtains the enhanced alkali-free liquid accelerator of environmental protection；The step institute
The mass concentration for making the enhanced alkali-free liquid accelerator of the environmental protection with the total amount of water is 40~70%.
In the step (1), the dosage of the catalyst is the 0.3~0.6% of maleic anhydride and urea gross mass.It is described
In step (2), the dosage of the ammonium persulfate is total matter of the solute in acylate, acrylamide solution and acrylic acid solution
The 0.5~3.0% of amount；The dosage of the molecular weight regulator is in acylate, acrylamide solution and acrylic acid solution
The 0.2~3.0% of the gross mass of solute.In the step (3), the dosage of the catalyst is the gross mass of hydramine and ethanedioic acid
0.3~4.0%.
The molecular weight regulator be thioacetic acid, mercaptopropionic acid, mercaptoethanol, isopropanol and lauryl mercaptan at least
It is a kind of.The pH adjusting agent is at least one in the concentrated sulfuric acid, p-methyl benzenesulfonic acid, citric acid, tartaric acid, salicylic acid and hydrofluoric acid
Kind.
The foregoing is only a preferred embodiment of the present invention, the range that the present invention that therefore, it cannot be limited according to is implemented, i.e.,
Equivalent changes and modifications made in accordance with the scope of the invention and the contents of the specification should still be within the scope of the present invention.
Claims (7)
1. a kind of preparation method of the enhanced alkali-free liquid accelerator of environmental protection, characterized by the following steps:
(1) acylation reaction: being first added maleic anhydride and urea in reaction unit, under nitrogen protection, is warming up to 60 DEG C, adds
Catalyst is to slowly warm up to 70~90 DEG C, 1.5~4h of constant temperature, and cooling obtains acylate, the molar ratio of maleic anhydride and urea
For 1:1~2；
(2) preparation of suspension stabilizer: by above-mentioned acylate, acrylamide aqueous solution, acrylic acid aqueous solution, ammonium persulfate water
Solution and molecular weight regulator aqueous solution, which instill in water, to be reacted, and reaction temperature is 50~90 DEG C, and time for adding is 1.0~
4.0h keeps the temperature 0~3.0h, obtains suspension stabilizer；The total amount of water used in the step makes the mass concentration of the suspension stabilizer be 5
~40%, the mass ratio of acylate, acrylamide solution and acrylic acid solution is 1:1~2:0.2~1；
(3) preparation of reinforcing agent: hydramine and ethanedioic acid are reacted, and 50~90 DEG C of reaction temperature, add catalyst, reaction
Time is 1~4h, obtains the first mixture；Glycerine is added into the first mixture again to be reacted, reaction temperature 70~90
DEG C, reaction time 1-4h obtains reinforcing agent；The molar ratio of hydramine, ethanedioic acid and glycerine is 1:1:0.4~1.2；Above-mentioned alcohol
Amine is monoethanolamine, diethanol amine, triethanolamine and triisopropanolamine, diethanol monoisopropanolamine and monoethanol diisopropanolamine (DIPA)
At least one of；
Catalyst in above-mentioned steps (1) and step (3) is p-methyl benzenesulfonic acid and/or the concentrated sulfuric acid；
(4) by weight, suspension stabilizer made from 0.2~3.0 part of step (2) and 1~10 part of pH adjusting agent are added
It is stirred into water, reaction temperature is 10~60 DEG C, adds 30~60 parts of aluminum sulfate, adds 1~20 after 0.2~2.0h
Reinforcing agent made from part step (3) reacts 0.2~1h, obtains the enhanced alkali-free liquid accelerator of environmental protection；Water used in the step
Total amount make the enhanced alkali-free liquid accelerator of the environmental protection mass concentration be 40~70%.
2. preparation method as described in claim 1, it is characterised in that: in the step (1), the dosage of the catalyst is horse
Come the 0.3~0.6% of acid anhydrides and urea gross mass.
3. preparation method as described in claim 1, it is characterised in that: in the step (2), the dosage of the ammonium persulfate is
The 0.5~3.0% of the gross mass of solute in acylate, acrylamide solution and acrylic acid solution.
4. preparation method as described in claim 1, it is characterised in that: in the step (2), the use of the molecular weight regulator
Amount is the 0.2~3.0% of the gross mass of the solute in acylate, acrylamide solution and acrylic acid solution.
5. preparation method as described in claim 1, it is characterised in that: in the step (3), the dosage of the catalyst is alcohol
The 0.3~4.0% of the gross mass of amine and ethanedioic acid.
6. the preparation method as described in any claim in claim 1 to 5, it is characterised in that: the molecular weight regulator
For at least one of thioacetic acid, mercaptopropionic acid, mercaptoethanol, isopropanol and lauryl mercaptan.
7. the preparation method as described in any claim in claim 1 to 5, it is characterised in that: the pH adjusting agent is
At least one of the concentrated sulfuric acid, p-methyl benzenesulfonic acid, citric acid, tartaric acid, salicylic acid and hydrofluoric acid.
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| CN201810937456.9A CN109020292B (en) | 2018-08-16 | 2018-08-16 | Preparation method of environment-friendly enhanced alkali-free liquid accelerator |
| MYPI2019003975A MY192741A (en) | 2018-08-16 | 2019-05-08 | Method of preparing eco-friendly reinforced alkali-free liquid accelerators |
| PCT/CN2019/085963 WO2020034670A1 (en) | 2018-08-16 | 2019-05-08 | Preparation method for environmentally friendly reinforcement-type alkali-free liquid quick-setting agent |
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Cited By (5)
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| CN109879631A (en) * | 2019-03-25 | 2019-06-14 | 科之杰新材料集团有限公司 | High-strength solubilized type liquid accelerator of one kind and preparation method thereof |
| WO2020034670A1 (en) * | 2018-08-16 | 2020-02-20 | 科之杰新材料集团有限公司 | Preparation method for environmentally friendly reinforcement-type alkali-free liquid quick-setting agent |
| CN113563004A (en) * | 2021-08-13 | 2021-10-29 | 科之杰新材料集团 (贵州)有限公司 | Early strength agent and preparation method thereof |
| CN114956653A (en) * | 2022-03-15 | 2022-08-30 | 山西佳维新材料股份有限公司 | Coordination activator, liquid alkali-free accelerator and preparation method and application thereof |
| CN116161893A (en) * | 2023-03-02 | 2023-05-26 | 中国水利水电第七工程局有限公司 | Preparation method of crosslinking monomer for preparing high-early-strength low-resilience concrete |
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| WO2020034670A1 (en) * | 2018-08-16 | 2020-02-20 | 科之杰新材料集团有限公司 | Preparation method for environmentally friendly reinforcement-type alkali-free liquid quick-setting agent |
| CN109879631A (en) * | 2019-03-25 | 2019-06-14 | 科之杰新材料集团有限公司 | High-strength solubilized type liquid accelerator of one kind and preparation method thereof |
| WO2020192140A1 (en) * | 2019-03-25 | 2020-10-01 | 科之杰新材料集团有限公司 | High-intensity solubilizing liquid accelerator and preparation method therefor |
| CN113563004A (en) * | 2021-08-13 | 2021-10-29 | 科之杰新材料集团 (贵州)有限公司 | Early strength agent and preparation method thereof |
| CN113563004B (en) * | 2021-08-13 | 2022-05-17 | 科之杰新材料集团(贵州)有限公司 | Early strength agent and preparation method thereof |
| CN114956653A (en) * | 2022-03-15 | 2022-08-30 | 山西佳维新材料股份有限公司 | Coordination activator, liquid alkali-free accelerator and preparation method and application thereof |
| CN116161893A (en) * | 2023-03-02 | 2023-05-26 | 中国水利水电第七工程局有限公司 | Preparation method of crosslinking monomer for preparing high-early-strength low-resilience concrete |
| CN116161893B (en) * | 2023-03-02 | 2023-12-01 | 中国水利水电第七工程局有限公司 | Preparation method of crosslinking monomer for preparing high-early-strength low-resilience concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109020292B (en) | 2020-04-10 |
| MY192741A (en) | 2022-09-06 |
| WO2020034670A1 (en) | 2020-02-20 |
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