CN107936258A - A kind of sustained-release water reducing agent containing sodium lignin sulfonate and preparation method thereof - Google Patents
A kind of sustained-release water reducing agent containing sodium lignin sulfonate and preparation method thereof Download PDFInfo
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- CN107936258A CN107936258A CN201711336295.XA CN201711336295A CN107936258A CN 107936258 A CN107936258 A CN 107936258A CN 201711336295 A CN201711336295 A CN 201711336295A CN 107936258 A CN107936258 A CN 107936258A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 title claims abstract description 41
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000013268 sustained release Methods 0.000 title claims abstract description 20
- 239000012730 sustained-release form Substances 0.000 title claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 45
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims abstract description 38
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 19
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 19
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 19
- WTDHULULXKLSOZ-UHFFFAOYSA-N Hydroxylamine hydrochloride Chemical compound Cl.ON WTDHULULXKLSOZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 12
- LDCRTTXIJACKKU-ONEGZZNKSA-N dimethyl fumarate Chemical compound COC(=O)\C=C\C(=O)OC LDCRTTXIJACKKU-ONEGZZNKSA-N 0.000 claims abstract description 10
- 229960004419 dimethyl fumarate Drugs 0.000 claims abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 39
- 239000008367 deionised water Substances 0.000 claims description 25
- 229910021641 deionized water Inorganic materials 0.000 claims description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 102000003992 Peroxidases Human genes 0.000 claims description 3
- 108040007629 peroxidase activity proteins Proteins 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 claims 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 claims 1
- 229960001826 dimethylphthalate Drugs 0.000 claims 1
- 101710171243 Peroxidase 10 Proteins 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 229920005646 polycarboxylate Polymers 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/021—Block or graft polymers containing only sequences of polymers of C08C or C08F
-
- 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
- C04B24/18—Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
-
- 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
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention belongs to technical field of concrete additives, and in particular to a kind of sustained-release water reducing agent containing sodium lignin sulfonate and preparation method thereof.The water-reducing agent is prepared by following raw material：30 35 parts of isobutene alcohol polyoxyethylene ether, 28 parts of methacrylic acid, 35 parts of styrene, 35 parts of sodium lignin sulfonate, 12 parts of dimethyl fumarate, 0.5 part of 30% hydrogen peroxidase 10 .3,0.1 0.2 parts of ammonium persulfate, thin 0.1 0.2 parts of base ethanol, 0.05 0.08 parts of hydroxylamine hydrochloride.Water-reducing agent prepared by the present invention is economic and environment-friendly by introducing portion sodium lignin sulfonate, reduces the production cost of polycarboxylate water-reducer.The water-reducing agent of preparation can improve concrete workability makes concrete have a good retentivity at the same time, had good sustained release effect, and function of slump protection is good.
Description
Technical field
The invention belongs to technical field of concrete additives, and in particular to a kind of slow-release diminishing containing sodium lignin sulfonate
Agent and preparation method thereof.
Background technology
In order to meet the requirements the application requirement of the water-reducing agent stepped up, polycarboxylate water-reducer is developed in succession.Slow-release subtracts
Aqua has the characteristic for slowly discharging its peptizaiton, can reach the effect for making the mobility of concrete gradually increase, can
With good working performance when enough preventing the bleeding of fresh concrete, and can ensure that concrete construction, and can be to avoid height
The too fast phenomenon of concrete slump loss caused by temperature transport.
Existing sustained-release water reducing agent function of slump protection is undesirable.Therefore, seek a kind of synthetic method simply and protected with high
The water-reducing agent for performance of collapsing is of great significance.
The content of the invention
For shortcoming existing in the prior art, the present invention provides a kind of sustained-release water reducing agent containing sodium lignin sulfonate.
Present invention also offers a kind of preparation method of the above-mentioned sustained-release water reducing agent containing wooden disulfonate acid.
The used to achieve these goals technical solution of the present invention is：
A kind of sustained-release water reducing agent containing sodium lignin sulfonate of the present invention, is prepared by following raw material：Isobutene
30-35 parts of alcohol polyoxyethylene ether, 2-8 parts of methacrylic acid, 3-5 parts of styrene, 3-5 parts of sodium lignin sulfonate, fumaric acid two
1-2 parts of methyl esters .3-0.5 parts of 30% hydrogen peroxidase 10,0.1-0.2 parts of ammonium persulfate, thin 0.1-0.2 parts of base ethanol, hydroxylamine hydrochloride
0.05-0.08 parts.
Present invention also offers a kind of preparation method of sustained-release water reducing agent, comprise the following steps：
（1）Sodium lignin sulfonate is uniformly mixed with the methacrylic acid of half first, then adds 30% hydrogen peroxide, go from
Sub- water, insulation reaction, obtains pretreatment sodium lignin sulfonate；
（2）The isobutene alcohol polyoxyethylene ether of parts by weight, pretreatment sodium lignin sulfonate, thin base ethanol are uniformly mixed, then
Add deionized water, wiring solution-forming A；
（3）Parts by weight of styrene, the other half methacrylic acid, dimethyl fumarate are added in deionized water and mixed
It is even, form solution B；
（4）Ammonium persulfate, hydroxylamine hydrochloride are added in deionized water and are uniformly mixed, forms solution C；
（5）Solution A is warming up to 65 DEG C, is then slowly added drop-wise to solution B and solution C in solution A, the time for adding of solution B
For 3h, the time for adding of solution C is 3.5h, insulated and stirred 1h after completion of dropwise addition, adds 30% sodium hydrate aqueous solution adjusting PH and is
Neutrality.
Further, the sodium lignin sulfonate and the mass ratio of deionized water are 2：5.
Further, step（1）In, the temperature of the reaction is 70 DEG C, reaction time 1h.
Further, the mass ratio of the isobutene alcohol polyoxyethylene ether and deionized water is 1：1.
Further, the styrene and the mass ratio of deionized water 1：3.
Further, the ammonium persulfate and the mass ratio of deionized water are 1：10.
The molecular weight of isobutene alcohol polyoxyethylene ether used in the present invention is 2000-2400.
The present invention is initiator by using ammonium persulfate, adds chain-transferring agent, adjusts the proportionate relationship between each raw material,
The water-reducing agent of preparation has high conversion, and invention introduces dimethyl fumarate, the ester bond in structure can be slowly in premixing
Discharged under the alkaline condition of concrete, avoid carboxyl from being adsorbed by cement moment, cause a large amount of carboxyls to lose, so as to be unfavorable for
The retentivity of concrete；The effect slowly discharged can be reached again using the existing good function of slump protection of the water-reducing agent, make coagulation
Earthy state has good mobility always, is more conducive to the completion of summer pumping construction.
Beneficial effects of the present invention are：
（1）The water-reducing agent is economic and environment-friendly by introducing portion sodium lignin sulfonate, reduces being produced into for polycarboxylate water-reducer
This.
（2）The water-reducing agent of preparation can improve concrete workability makes concrete have good retentivity, sustained release effect at the same time
Fruit is good, and function of slump protection is good.
Embodiment
Below by embodiment, the present invention will be further elaborated, and the description below is only for explaining the present invention, not
Its content is defined.
Embodiment 1
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated and is：30 parts of isobutene alcohol polyoxyethylene ether, metering system
5 parts of acid, 5 parts of styrene, 4 parts of sodium lignin sulfonate, 2 parts of dimethyl fumarate .5 parts of 30% hydrogen peroxidase 10, ammonium persulfate 0.1
Part, dredge 0.1 part of base ethanol, 0.05 part of hydroxylamine hydrochloride.
Preparation method is as follows：
（1）Sodium lignin sulfonate is uniformly mixed with the methacrylic acid of half first, then adds 30% hydrogen peroxide, is added
Account for the deionized water of 2.5 times of sodium lignin sulfonate quality, insulation reaction 1h at 70 DEG C, obtains pretreatment sodium lignin sulfonate；
（2）The isobutene alcohol polyoxyethylene ether of parts by weight, pretreatment sodium lignin sulfonate, thin base ethanol are uniformly mixed, then
Add the deionized water with quality such as isobutene alcohol polyoxyethylene ether, wiring solution-forming A；
（3）Parts by weight of styrene, the other half methacrylic acid, dimethyl fumarate are added to and account for 3 times of styrene quality
It is uniformly mixed in deionized water, forms solution B；
（4）Ammonium persulfate, hydroxylamine hydrochloride are added in the deionized water for accounting for 10 times of ammonium persulfate quality and are uniformly mixed, formed molten
Liquid C；
（5）Solution A is warming up to 65 DEG C, is then slowly added drop-wise to solution B and solution C in solution A, the time for adding of solution B
For 3h, the time for adding of solution C is 3.5h, insulated and stirred 1h after completion of dropwise addition, adds 30% sodium hydrate aqueous solution adjusting PH and is
Neutrality.
Embodiment 2
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated and is：32 parts of isobutene alcohol polyoxyethylene ether, metering system
2 parts of acid, 4 parts of styrene, 3 parts of sodium lignin sulfonate, 2 parts of dimethyl fumarate .3 parts of 30% hydrogen peroxidase 10, ammonium persulfate 0.2
Part, dredge 0.2 part of base ethanol, 0.07 part of hydroxylamine hydrochloride.
Preparation method is the same as embodiment 1.
Embodiment 3
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated and is：35 parts of isobutene alcohol polyoxyethylene ether, metering system
8 parts of acid, 3 parts of styrene, 5 parts of sodium lignin sulfonate, 2 parts of dimethyl fumarate .3 parts of 30% hydrogen peroxidase 10, ammonium persulfate 0.2
Part, dredge 0.2 part of base ethanol, 0.08 part of hydroxylamine hydrochloride.
Preparation method is the same as embodiment 1.
Comparative example 1
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated and is：30 parts of isobutene alcohol polyoxyethylene ether, metering system
5 parts of acid, 5 parts of styrene, 4 parts of sodium lignin sulfonate, 2 parts of dimethyl fumarate .5 parts of 30% hydrogen peroxidase 10, ammonium persulfate 0.1
Part, dredge 0.1 part of base ethanol.
Preparation method is the same as embodiment 1.
Comparative example 2
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated and is：35 parts of isobutene alcohol polyoxyethylene ether, metering system
8 parts of acid, 3 parts of styrene, 5 parts of sodium lignin sulfonate .3 parts of 30% hydrogen peroxidase 10,0.2 part of ammonium persulfate, thin base ethanol 0.2
Part.
Preparation method is as follows：
（1）Sodium lignin sulfonate is uniformly mixed with the methacrylic acid of half first, then adds 30% hydrogen peroxide, is added
Account for the deionized water of 2.5 times of sodium lignin sulfonate quality, insulation reaction 1h at 70 DEG C, obtains pretreatment sodium lignin sulfonate；
（2）The isobutene alcohol polyoxyethylene ether of parts by weight, pretreatment sodium lignin sulfonate, thin base ethanol are uniformly mixed, then
Add the deionized water with quality such as isobutene alcohol polyoxyethylene ether, wiring solution-forming A；
（3）Parts by weight of styrene, the other half methacrylic acid are added in the deionized water for accounting for 3 times of styrene quality and mixed
Uniformly, solution B is formed；
（4）Ammonium persulfate is added in the deionized water for accounting for 10 times of ammonium persulfate quality and be uniformly mixed, form solution C；
（5）Solution A is warming up to 65 DEG C, is then slowly added drop-wise to solution B and solution C in solution A, the time for adding of solution B
For 3h, the time for adding of solution C is 3.5h, insulated and stirred 1h after completion of dropwise addition, adds 30% sodium hydrate aqueous solution adjusting PH and is
Neutrality.
Comparative example 3
A kind of sustained-release water reducing agent containing sodium lignin sulfonate, is formulated identical with embodiment 1.
Preparation method is as follows：
（1）The isobutene alcohol polyoxyethylene ether of parts by weight, pretreatment sodium lignin sulfonate, thin base ethanol are uniformly mixed, then
Add the deionized water with quality such as isobutene alcohol polyoxyethylene ether, wiring solution-forming A；
（2）Parts by weight sodium lignin sulfonate, styrene, methacrylic acid, dimethyl fumarate are added to and account for styrene quality 3
It is uniformly mixed in deionized water again, forms solution B；
（3）Ammonium persulfate, hydroxylamine hydrochloride are added in the deionized water for accounting for 10 times of ammonium persulfate quality and are uniformly mixed, formed molten
Liquid C；
（4）Solution A is warming up to 65 DEG C, is then slowly added drop-wise to solution B and solution C in solution A, the time for adding of solution B
For 3h, the time for adding of solution C is 3.5h, insulated and stirred 1h after completion of dropwise addition, adds 30% sodium hydrate aqueous solution adjusting PH and is
Neutrality.
Effect example
（One）The sustained-release water reducing agent that embodiment 1-3 and comparative example 1-3 is synthesized carries out performance detection：
Using reference cement, according to《Concrete admixture》（GB8076-2008）In test request, detection water-reducing rate, flowing
Degree, the slump, the results are shown in Table 1.
Table 1
As can be seen from Table 1, the water-reducing agent that prepared by the present invention is made while with high dispersion, and with very strong sustained release
With, the problems such as carboxyl is slowly discharged under the alkaline condition of ready-mixed concrete, moment absorption is reduced, reduces slump-loss,
Concrete construction performance is improved, and is adapted to prolonged hauling operation, meanwhile, addition content is few.
（Two）Water-reducing agent prepared by embodiment 1-3 and comparative example 1-4 carries out shelf-life detection, product prepared by the present invention
The shelf-life prepared compared with comparative example 2 improves more than 3 months.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from the limit of embodiment
System, it is other it is any without departing from the present invention Spirit Essences with made under principle change, modification, combine, replacement, simplification should be
Equivalence replacement mode, is included within protection scope of the present invention.
Claims (7)
1. a kind of sustained-release water reducing agent containing sodium lignin sulfonate, it is characterised in that be prepared by following raw material：
30-35 parts of isobutene alcohol polyoxyethylene ether, 2-8 parts of methacrylic acid, 3-5 parts of styrene, 3-5 parts of sodium lignin sulfonate, richness
1-2 parts of horse dimethyl phthalate .3-0.5 parts of 30% hydrogen peroxidase 10,0.1-0.2 parts of ammonium persulfate, thin 0.1-0.2 parts of base ethanol, hydrochloric acid
0.05-0.08 parts of azanol.
2. a kind of preparation method of sustained-release water reducing agent as claimed in claim 1, it is characterised in that comprise the following steps：
（1）Sodium lignin sulfonate is uniformly mixed with the methacrylic acid of half first, then adds 30% hydrogen peroxide, go from
Sub- water, insulation reaction, obtains pretreatment sodium lignin sulfonate；
（2）The isobutene alcohol polyoxyethylene ether of parts by weight, pretreatment sodium lignin sulfonate, thin base ethanol are uniformly mixed, then
Add deionized water, wiring solution-forming A；
（3）Parts by weight of styrene, the other half methacrylic acid, dimethyl fumarate are added in deionized water and mixed
It is even, form solution B；
（4）Ammonium persulfate, hydroxylamine hydrochloride are added in deionized water and are uniformly mixed, forms solution C；
（5）Solution A is warming up to 65 DEG C, is then slowly added drop-wise to solution B and solution C in solution A, the time for adding of solution B
For 3h, the time for adding of solution C is 3.5h, insulated and stirred 1h after completion of dropwise addition, adds 30% sodium hydrate aqueous solution adjusting PH and is
Neutrality.
3. preparation method according to claim 2, it is characterised in that the quality of the sodium lignin sulfonate and deionized water
Than for 2：5.
4. the preparation method according to Claims 2 or 3, it is characterised in that step（1）In, the temperature of the reaction is 70
DEG C, reaction time 1h.
5. preparation method according to claim 2, it is characterised in that the isobutene alcohol polyoxyethylene ether and deionized water
Mass ratio be 1：1.
6. preparation method according to claim 2, it is characterised in that the styrene and the mass ratio of deionized water 1：3.
7. preparation method according to claim 2, it is characterised in that the ammonium persulfate and the mass ratio of deionized water are
1：10.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108503256A (en) * | 2018-04-27 | 2018-09-07 | 江苏百瑞吉新材料有限公司 | A kind of comprehensive polycarboxylate water-reducer of adaptability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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