CN111925491A - Polyether-based maleimide copolymer and application thereof in concrete additive - Google Patents
Polyether-based maleimide copolymer and application thereof in concrete additive Download PDFInfo
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- CN111925491A CN111925491A CN202010853131.XA CN202010853131A CN111925491A CN 111925491 A CN111925491 A CN 111925491A CN 202010853131 A CN202010853131 A CN 202010853131A CN 111925491 A CN111925491 A CN 111925491A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
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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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- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Abstract
The invention discloses a polyether-based maleimide copolymer, which is characterized in that the polyether-based maleimide copolymer is prepared by free radical polymerization of polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid. The concrete additive prepared from the polyether-based maleimide copolymer can improve the strength, durability and frost thawing resistance of concrete, has small mixing amount and obvious plasticizing effect, can obviously increase the slump of the concrete, and has good adaptability with the concrete.
Description
The invention relates to a divisional application of Chinese patent 'a concrete additive and a preparation method thereof', the application date is 5 and 23 months in 2018, and the application number is 201810503240.1.
Technical Field
The invention relates to the technical field of concrete additives, in particular to a polyether-based maleimide copolymer and application thereof in concrete additives.
Background
Concrete is one of the most important civil engineering materials in the present generation, and is called concrete for short, and is an engineering composite material formed by binding aggregate into a whole by using a binding material. The most common concrete uses cement as a cementing material and sand and stone as aggregates; the cement concrete is mixed with water and additives according to a certain proportion and is stirred to obtain the common concrete. Among them, the additive is one of indispensable components for ensuring excellent workability, strength and durability of concrete, and is effective in improving and adjusting the properties of concrete.
Concrete additives are widely varied, such as water reducers, air entrainers and pumpants for improving the rheological properties of concrete mixtures, retarders, early strength agents and accelerators for adjusting the setting time and setting properties of concrete, air entrainers, water repellents and rust inhibitors for improving the durability of concrete, air entrainers, expanding agents, colorants, anti-freezing agents, water repellents and pumpants for improving other properties of concrete, and the like. The additives have positive effects on improving the performance of concrete and improving the quality of construction engineering. However, the additives in the prior art have single functions, and a large amount of additives with different weights are required to be added simultaneously to obtain concrete with excellent comprehensive performance, but the addition of a large amount of additives can cause negative effects on the setting time and early and late strength of the concrete to different degrees due to the problem of caking property. In addition, the additive in the prior art has the defects of poor water reducing effect, large mixing amount, poor plasticizing effect and easy deterioration.
Therefore, the concrete additive which has low price, small mixing amount and obvious plasticizing effect, can obviously increase the slump of concrete and improve the cohesiveness and the workability of the concrete is developed to meet the market demand, and has wide market value and application prospect.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the concrete additive and the preparation method thereof, the preparation method is simple and easy to implement, has higher water reducing rate, can improve the strength, durability and frost resistance of concrete, has small mixing amount and obvious plasticizing effect, can obviously increase the slump of the concrete and improve the cohesiveness and workability of the concrete, and has low cost and good adaptability with the concrete.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: the concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 10-15 parts of sodium alginate and 1-5 parts of modified wollastonite powder.
Further, the polyether-based maleimide copolymer is prepared by free radical polymerization of polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid.
Preferably, the preparation method of the polyether-based maleimide copolymer comprises the following steps: adding polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid, maleimide-tri (ethylene glycol) -propionic acid and an initiator into a high-boiling-point solvent, stirring and reacting for 3-5 hours at 60-70 ℃ in the atmosphere of nitrogen or inert gas, and then removing the high-boiling-point solvent by rotary evaporation to obtain the polyether-based maleimide copolymer.
Preferably, the mass ratio of the polyethylene glycol monoallyl ether to the furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione to the 4,4 '-diaminostilbene-2, 2' -disulfonic acid to the maleimide-tris (ethylene glycol) -propionic acid to the initiator to the high-boiling solvent is 1:0.5:1:1 (0.02-0.04): 8-12.
Preferably, the initiator is selected from one or more of cumene hydroperoxide, tert-butyl hydroperoxide, cyclohexanone peroxide, dicyclohexyl peroxydicarbonate, azobisisobutyronitrile and azobisisoheptonitrile.
Preferably, the inert gas is selected from one or more of helium, neon and argon.
Preferably, the high boiling point solvent is selected from one or more of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
Preferably, the preparation method of the modified wollastonite powder comprises the following steps: dispersing wollastonite powder in ethanol, adding a coupling agent, stirring at 40-60 ℃ for reaction for 3-5 hours, centrifuging, and drying in a vacuum drying oven at 70-80 ℃ for 15-18 hours to obtain the modified wollastonite powder.
Preferably, the mass ratio of the wollastonite powder to the ethanol to the coupling agent is (3-5) to 10 (0.03-0.05).
Preferably, the coupling agent is selected from one or more of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
Preferably, the preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 20-30 minutes, and discharging to obtain the concrete additive.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1) the preparation method of the concrete additive provided by the invention has the advantages of simple process, operation, no rigor to equipment and reaction conditions, and suitability for large-scale industrial production.
2) The concrete additive provided by the invention overcomes the technical problems of single performance, insignificant effect on improving the performance of the concrete, poor plasticity, large mixing amount and easy deterioration of the traditional concrete additive in the prior art, has the advantages of low price, multiple functions, capability of improving the strength, durability and frost-thaw resistance of the concrete, small mixing amount, significant plasticizing effect, capability of obviously increasing the slump of the concrete, capability of improving the cohesiveness and workability of the concrete, good adaptability with the concrete and no negative influence on the performance of a concrete body.
3) The concrete additive provided by the invention has excellent comprehensive performance through reasonable compatibility of all components, and the addition of the modified wollastonite powder and the sodium alginate improves the water reducing efficiency and the fluidity of the concrete, reduces slump loss and surface shrinkage and cracks, improves the impermeability and the durability of the concrete, and comprehensively improves the comprehensive performance of the concrete.
4) The concrete additive provided by the invention has the functions of a water reducing agent, an air entraining agent, a pumping aid, a retarder, an early strength agent, an accelerator, a waterproof agent, a rust inhibitor, an antifreezing agent and a grinding aid through reasonable compatibility of the components, and effectively avoids negative effects on the setting time and the early and late strength of the concrete caused by mixing a large amount of additives with different weights and functions.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The raw materials described in the following examples of the present invention are from Shanghai spring Xin import & export trade company, Inc.
Example 1
The concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 10 parts of sodium alginate and 1 part of modified wollastonite powder.
The polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid through free radical polymerization.
The preparation method of the polyether-based maleimide copolymer comprises the following steps: 10g of polyethylene glycol monoallyl ether, 5g of furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 10g of 4,4 '-diaminostilbene-2, 2' -disulfonic acid, 10g of maleimide-tris (ethylene glycol) -propionic acid and 0.2g of cumene hydroperoxide were added to 80g of dimethyl sulfoxide, and the mixture was stirred and reacted at 60 ℃ for 3 hours in a nitrogen atmosphere, followed by removing the dimethyl sulfoxide by rotary evaporation to obtain a polyether-based maleimide copolymer.
The preparation method of the modified wollastonite powder comprises the following steps: dispersing 30g of wollastonite powder into 100g of ethanol, adding KH5500.3g of silane coupling agent, stirring and reacting for 3 hours at 40 ℃, centrifuging, and placing in a vacuum drying oven for drying for 15 hours at 70 ℃ to obtain the modified wollastonite powder.
The preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 20 minutes, and discharging to obtain the concrete additive.
Example 2
The concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 12 parts of sodium alginate and 2 parts of modified wollastonite powder.
The polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid through free radical polymerization.
The preparation method of the polyether-based maleimide copolymer comprises the following steps: 10g of polyethylene glycol monoallyl ether, 5g of furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 10g of 4,4 '-diaminostilbene-2, 2' -disulfonic acid, 10g of maleimide-tris (ethylene glycol) -propionic acid and 0.25g of cyclohexanone peroxide are added into 90g of N, N-dimethylformamide, stirred and reacted for 3.5 hours at 63 ℃ in a helium atmosphere, and then the N, N-dimethylformamide is removed by rotary evaporation to obtain the polyether-based maleimide copolymer.
The preparation method of the modified wollastonite powder comprises the following steps: dispersing 35g of wollastonite powder into 100g of ethanol, adding KH5600.35g of silane coupling agent, stirring and reacting for 4 hours at 45 ℃, centrifuging, and placing in a vacuum drying oven for drying for 16 hours at 73 ℃ to obtain the modified wollastonite powder.
The preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 24 minutes, and discharging to obtain the concrete additive.
Example 3
The concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 13 parts of sodium alginate and 3 parts of modified wollastonite powder.
The polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid through free radical polymerization.
The preparation method of the polyether-based maleimide copolymer comprises the following steps: 10g of polyethylene glycol monoallyl ether, 5g of furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 10g of 4,4 '-diaminostilbene-2, 2' -disulfonic acid, 10g of maleimide-tris (ethylene glycol) -propionic acid and 0.3g of dicyclohexyl peroxydicarbonate were added to 100g of N-methylpyrrolidone, and the mixture was stirred and reacted at 65 ℃ for 4 hours in a neon atmosphere, followed by rotary evaporation to remove the N-methylpyrrolidone, thereby obtaining a polyether-based maleimide copolymer.
The preparation method of the modified wollastonite powder comprises the following steps: dispersing 40g of wollastonite powder into 100g of ethanol, adding KH5700.4g of silane coupling agent, stirring and reacting for 4 hours at 50 ℃, centrifuging, and placing in a vacuum drying oven for drying for 16 hours at 75 ℃ to obtain the modified wollastonite powder.
The preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 25 minutes, and discharging to obtain the concrete additive.
Example 4
The concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 14 parts of sodium alginate and 4 parts of modified wollastonite powder.
The polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid through free radical polymerization.
The preparation method of the polyether-based maleimide copolymer comprises the following steps: adding 10g of polyethylene glycol monoallyl ether, 5g of furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 10g of 4,4 '-diaminostilbene-2, 2' -disulfonic acid, 10g of maleimide-tri (ethylene glycol) -propionic acid and 0.35g of initiator into 110g of high-boiling-point solvent, stirring and reacting for 4.5 hours at 67 ℃ under an argon atmosphere, and then removing the high-boiling-point solvent by rotary evaporation to obtain the polyether-based maleimide copolymer; the initiator is a mixture formed by mixing cumene hydroperoxide, tert-butyl hydroperoxide, cyclohexanone peroxide and dicyclohexyl peroxydicarbonate according to the mass ratio of 1:2:1: 4; the high-boiling-point solvent is a mixture formed by mixing dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone according to a mass ratio of 3:2: 5.
The preparation method of the modified wollastonite powder comprises the following steps: dispersing 45g of wollastonite powder into 100g of ethanol, adding 0.45g of coupling agent, stirring and reacting for 4.5 hours at 55 ℃, centrifuging, and placing in a vacuum drying oven for drying for 17.5 hours at 78 ℃ to obtain modified wollastonite powder; the coupling agent is a mixture formed by mixing a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570 according to a mass ratio of 2:3: 3.
The preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 28 minutes, and discharging to obtain the concrete additive.
Example 5
The concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 15 parts of sodium alginate and 5 parts of modified wollastonite powder.
The polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid and maleimide-tri (ethylene glycol) -propionic acid through free radical polymerization.
The preparation method of the polyether-based maleimide copolymer comprises the following steps: 10g of polyethylene glycol monoallyl ether, 5g of furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 10g of 4,4 '-diaminostilbene-2, 2' -disulfonic acid, 10g of maleimide-tris (ethylene glycol) -propionic acid, and 0.4g of azobisisobutyronitrile were added to 120g of N-methylpyrrolidone, and the mixture was stirred and reacted at 70 ℃ for 5 hours in a nitrogen atmosphere, followed by removing the N-methylpyrrolidone by rotary evaporation to obtain a polyether-based maleimide copolymer.
The preparation method of the modified wollastonite powder comprises the following steps: dispersing 50g of wollastonite powder into 100g of ethanol, adding 0.5g of coupling agent KH5500.5g, stirring and reacting at 60 ℃ for 5 hours, centrifuging, and placing in a vacuum drying oven to dry at 80 ℃ for 18 hours to obtain the modified wollastonite powder.
The preparation method of the concrete additive comprises the following steps: adding the components into a high-speed mixer, uniformly mixing to obtain a mixture, adding the mixture into a ball mill, grinding for 30 minutes, and discharging to obtain the concrete additive.
Comparative example
The concrete additive is prepared according to the raw materials and the preparation method of the embodiment 1 of the Chinese patent CN 107804990A.
The concrete additive samples obtained in the above examples 1 to 5 and comparative example were subjected to performance tests, the test results are shown in table 1, and the water permeability coefficient and pit length performance test methods: refer to CJJ/T135-2009 technical Specification for pervious cement concrete pavements. Other performance test methods are carried out by referring to JG/T223-2007, and the additive mixing amount is 0.1%.
TABLE 1
As can be seen from Table 1, the concrete additive disclosed in the embodiment of the invention has the advantages of better water reducing effect, water permeability and wear resistance and capability of obviously increasing the slump of concrete compared with the concrete additive in the prior art.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A polyether-based maleimide copolymer, wherein the polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid, maleimide-tris (ethylene glycol) -propionic acid by free radical polymerization, and the preparation method comprises the following steps: adding polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxol-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid, maleimide-tri (ethylene glycol) -propionic acid and an initiator into a high-boiling-point solvent, stirring and reacting for 3-5 hours at 60-70 ℃ in the atmosphere of nitrogen or inert gas, and then removing the high-boiling-point solvent by rotary evaporation to obtain the polyether-based maleimide copolymer.
2. The polyether maleimide copolymer according to claim 1, wherein the mass ratio of the polyethylene glycol monoallyl ether, furo [3,4-d ] -1, 3-dioxole-2, 4, 6-trione, 4 '-diaminostilbene-2, 2' -disulfonic acid, maleimide-tri (ethylene glycol) -propionic acid, the initiator, and the high boiling point solvent is 1:0.5:1:1 (0.02-0.04): 8-12.
3. The polyether maleimide-based copolymer according to claim 1, wherein the initiator is one or more selected from the group consisting of cumene hydroperoxide, t-butyl hydroperoxide, cyclohexanone peroxide, dicyclohexyl peroxydicarbonate, azobisisobutyronitrile and azobisisoheptonitrile.
4. The polyether maleimide-based copolymer according to claim 1, wherein the inert gas is one or more selected from helium, neon and argon.
5. The polyether maleimide-based copolymer according to claim 1, wherein the high boiling point solvent is one or more selected from the group consisting of dimethylsulfoxide, N-dimethylformamide, and N-methylpyrrolidone.
6. The polyether maleimide-based copolymer according to any one of claims 1 to 5, and use thereof in a concrete additive.
7. The polyether maleimide copolymer and the application thereof in the concrete additive as claimed in claim 6, wherein the concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 10-15 parts of sodium alginate and 1-5 parts of modified wollastonite powder.
8. The polyether maleimide copolymer and the application thereof in concrete additives as claimed in claim 6, wherein the preparation method of the modified wollastonite powder comprises the following steps: dispersing wollastonite powder in ethanol, adding a coupling agent, stirring at 40-60 ℃ for reaction for 3-5 hours, centrifuging, and drying in a vacuum drying oven at 70-80 ℃ for 15-18 hours to obtain the modified wollastonite powder.
9. The polyether-based maleimide copolymer and the application thereof in the concrete additive according to claim 6, wherein the mass ratio of the wollastonite powder, the ethanol and the coupling agent is (3-5) to 10 (0.03-0.05).
10. The polyether maleimide copolymer and its use in concrete additive as claimed in claim 6, wherein the coupling agent is selected from one or more of silane coupling agent KH550, silane coupling agent KH560 and silane coupling agent KH 570.
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| CN202010853131.XA CN111925491A (en) | 2018-05-23 | 2018-05-23 | Polyether-based maleimide copolymer and application thereof in concrete additive |
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| CN201810503240.1A CN108751779B (en) | 2018-05-23 | 2018-05-23 | Concrete additive and preparation method thereof |
| CN202010853131.XA CN111925491A (en) | 2018-05-23 | 2018-05-23 | Polyether-based maleimide copolymer and application thereof in concrete additive |
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| CN201810503240.1A Active CN108751779B (en) | 2018-05-23 | 2018-05-23 | Concrete additive and preparation method thereof |
| CN202010853134.3A Withdrawn CN111943562A (en) | 2018-05-23 | 2018-05-23 | Preparation method of concrete additive with good water-reducing, water-permeable and wear-resisting properties |
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| CN202010853134.3A Withdrawn CN111943562A (en) | 2018-05-23 | 2018-05-23 | Preparation method of concrete additive with good water-reducing, water-permeable and wear-resisting properties |
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| CN111170765B (en) * | 2020-01-07 | 2021-12-31 | 北京建中新材科技有限公司 | Multi-component concrete surface reinforcing agent and reinforcing method thereof |
| CN111995756A (en) * | 2020-09-04 | 2020-11-27 | 韩昌龙 | Polymer cement concrete additive and preparation method thereof |
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| CN112759326A (en) * | 2021-01-12 | 2021-05-07 | 湖南恒德混凝土有限公司 | Concrete for construction of super-long concrete structure |
| CN112851190A (en) * | 2021-01-22 | 2021-05-28 | 夏梅 | Environment-friendly concrete additive and preparation method thereof |
| CN112979213A (en) * | 2021-02-18 | 2021-06-18 | 王允刚 | Production process of concrete additive |
| CN113060997A (en) * | 2021-04-15 | 2021-07-02 | 陕西黄峪工程材料有限公司 | RPC cover plate for subway evacuation platform and preparation method thereof |
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|---|---|---|---|---|
| CN104592506B (en) * | 2014-11-24 | 2017-01-18 | 沈阳工业大学 | N-methoxypolyethylene glycols-N,-carbamyl maleimide and preparation method thereof |
| CN107651896B (en) * | 2017-10-13 | 2020-12-18 | 衢州虎山混凝土有限公司 | Chemical-erosion-resistant high-durability concrete and preparation method thereof |
-
2018
- 2018-05-23 CN CN202010853142.8A patent/CN111943558A/en not_active Withdrawn
- 2018-05-23 CN CN201810503240.1A patent/CN108751779B/en active Active
- 2018-05-23 CN CN202010853134.3A patent/CN111943562A/en not_active Withdrawn
- 2018-05-23 CN CN202010853131.XA patent/CN111925491A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN108751779A (en) | 2018-11-06 |
| CN111943558A (en) | 2020-11-17 |
| CN111943562A (en) | 2020-11-17 |
| CN108751779B (en) | 2020-12-25 |
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