CN109824835A - A kind of poly carboxylic acid series water reducer and preparation method thereof - Google Patents
A kind of poly carboxylic acid series water reducer and preparation method thereof Download PDFInfo
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- CN109824835A CN109824835A CN201910057894.0A CN201910057894A CN109824835A CN 109824835 A CN109824835 A CN 109824835A CN 201910057894 A CN201910057894 A CN 201910057894A CN 109824835 A CN109824835 A CN 109824835A
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- carboxylic acid
- poly carboxylic
- water reducer
- water
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 118
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 150000001732 carboxylic acid derivatives Chemical class 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 36
- 239000010452 phosphate Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 34
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 31
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 26
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000003999 initiator Substances 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 6
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims abstract description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 25
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 24
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 12
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 9
- YXYZMHGSOKYZAF-UHFFFAOYSA-M [Cl-].C(C(=C)C)(=O)OCC[N+](C(C)(C)C)(C)C Chemical compound [Cl-].C(C(=C)C)(=O)OCC[N+](C(C)(C)C)(C)C YXYZMHGSOKYZAF-UHFFFAOYSA-M 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 3
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 235000019394 potassium persulphate Nutrition 0.000 claims description 2
- 235000010378 sodium ascorbate Nutrition 0.000 claims description 2
- PPASLZSBLFJQEF-RKJRWTFHSA-M sodium ascorbate Substances [Na+].OC[C@@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RKJRWTFHSA-M 0.000 claims description 2
- 229960005055 sodium ascorbate Drugs 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims 1
- 235000011130 ammonium sulphate Nutrition 0.000 claims 1
- 239000012986 chain transfer agent Substances 0.000 claims 1
- 239000000571 coke Substances 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 235000015424 sodium Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 21
- 239000000178 monomer Substances 0.000 abstract description 16
- 229920000867 polyelectrolyte Polymers 0.000 abstract description 7
- 239000002734 clay mineral Substances 0.000 abstract description 6
- 125000002091 cationic group Chemical group 0.000 abstract description 5
- 150000007513 acids Chemical class 0.000 abstract description 4
- 238000007334 copolymerization reaction Methods 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 239000000376 reactant Substances 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 40
- 230000000052 comparative effect Effects 0.000 description 21
- 229920005646 polycarboxylate Polymers 0.000 description 13
- 239000008187 granular material Substances 0.000 description 11
- -1 phosphate radical Chemical class 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- 150000002790 naphthalenes Chemical class 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 239000007859 condensation product Substances 0.000 description 4
- 208000012839 conversion disease Diseases 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000032050 esterification Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical group O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000003335 steric effect Effects 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 125000005395 methacrylic acid group Chemical group 0.000 description 2
- 125000002270 phosphoric acid ester group Chemical group 0.000 description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- RYRDKOIZZRUCMC-UHFFFAOYSA-N 2-hydroxy-4-methyl-1,3,2$l^{5}-dioxaphospholane 2-oxide Chemical compound CC1COP(O)(=O)O1 RYRDKOIZZRUCMC-UHFFFAOYSA-N 0.000 description 1
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- BUHOYQPYJJIICD-UHFFFAOYSA-L S(=O)([O-])[O-].[Na+].S(=O)(=O)(O)S(=O)O.[Na+] Chemical compound S(=O)([O-])[O-].[Na+].S(=O)(=O)(O)S(=O)O.[Na+] BUHOYQPYJJIICD-UHFFFAOYSA-L 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920005551 calcium lignosulfonate Polymers 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003847 radiation curing Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of poly carboxylic acid series water reducers and preparation method thereof, it is related to architecture engineering material technical field, the poly carboxylic acid series water reducer includes following raw material: 300-450 parts of methyl allyl polyoxyethylene ether, 100-150 parts of acrylic acid, 40-60 parts of acrylated phosphate, 1.0-5.0 parts of phosphate chain-transferring agent, 2-6 parts of hydroxy-ethyl acrylate, 0.5-2.0 parts of initiator, 0.5-1.5 parts of reducing agent, 0.3-1.5 parts of mercaptopropionic acid, 300-550 parts of water.Its preparation process is the following steps are included: 1) reactant is generated under the effect of the catalyst containing phosphate short-chain branch macromonomer；2) A material and B material are sequentially added, graft copolymerization generates polycarboxylic acids；3) cationic polyelectrolyte is prepared；4) liquid alkaline is added, adjusts pH value, obtains the poly carboxylic acid series water reducer of liquid.The present invention is interlaced with polymeric monomer long-chain branch by introducing phosphate short-chain branch on polymeric monomer, increases adaptability, the workability of water-reducing agent, with the being adapted to sandstone higher situation of material CLAY MINERALS AND THEIR SIGNIFICANCE content, proposes high-thin arch dam effect.
Description
Technical field
The present invention relates to architecture engineering material technical fields, more particularly, to a kind of poly carboxylic acid series water reducer and its preparation side
Method.
Background technique
Water-reducing agent is a kind of under conditions of maintaining concrete slump to be basically unchanged, and can be reduced the coagulation of mixing water amount
Native additive.Belong to anionic surfactant mostly, there is lignosulfonates, naphthalene sulphonate formaldehyde polymer etc..It is added mixed
There is peptizaiton to cement granules after solidifying soil mixture, its workability can be improved, reduce unit consumption of water, improve concrete mixing
Mobility；Or unit cement consumption is reduced, save cement.
Poly carboxylic acid series water reducer, it is novel as what is released after fatty family, naphthalene system and sulfamate based water reducer
High-performance water reducing agent, because it is low with volume, water-reducing rate is high, molecular structure adjustability is strong and the excellent performances such as environmentally protective,
It is applied in the series of concrete engineering such as high-speed railway, bridge, tunnel, dam more and more widely, but in face of domestic multiple
Miscellaneous changeable cement and concrete material, polycarboxylic acids dehydragent often can not embody its high performance advantage.As China is excellent
Matter sand and stone resources are reduced, and concrete composition complexity increases, especially in industrial and civil architecture, the high sandstone quilt of a large amount of clay contents
It is directly used in concrete mixing, so that newly mixing cement since clay content is higher, and reunites, phenomena such as poor dispersion,
The workability of fresh concrete, adaptability is caused to be deteriorated, slump-loss is accelerated, it is difficult to guarantee transport, pumping and construction.
Summary of the invention
The object of the present invention is to provide a kind of poly carboxylic acid series water reducers and preparation method thereof, by introducing phosphorus on polymeric monomer
Acid esters short-chain branch, it is interlaced with polymeric monomer long-chain branch, increase adaptability, the workability of water-reducing agent, with being adapted to sandstone material
The higher situation of CLAY MINERALS AND THEIR SIGNIFICANCE content, proposes high-thin arch dam effect.
Foregoing invention purpose of the invention has the technical scheme that
A kind of poly carboxylic acid series water reducer, the poly carboxylic acid series water reducer include following raw material: methacrylic is poly-
300-450 parts of ethylene oxide ether, 40-60 parts of acrylated phosphate, 2-6 parts of hydroxy-ethyl acrylate, causes 100-150 parts of acrylic acid
0.5-2.0 parts of agent, 0.5-1.5 parts of reducing agent, 0.3-1.5 parts of mercaptopropionic acid, 300-550 parts of water.
By using above-mentioned technical proposal, after cement plus water mix, due to the effect of cement granules molecular attraction, can make
Cement slurry forms flocculent structure, is wrapped in the mixing water of 10-30% in cement granules, cannot participate in flowing freely and lubricate
Effect, to affect the mobility of concrete mix.After polycarboxylate water-reducer is added, due to polycarboxylate water-reducer point
Sub- energy oriented attachment makes same charge (generally negative electrical charge) on cement particle surface band, is formed in the surface of cement granules
Electrostatic repulsion disperses cement granules mutually, disperses cement granules mutually, destroys flocculent structure, releases and wrapped up
Water, participate in flowing, to effectively increase the mobility of concrete mix.
Since phosphate radical is gathered around there are two negative electrical charge in phosphate, phosphate ester monomer is introduced on comb-shaped polymer main chain, benefit
Stronger electrostatic repulsion is generated with the stronger suction-operated and clay of phosphate and cement particle, to increase diminishing
The anti-mud of agent proposes high-thin arch dam effect with the being adapted to sandstone higher situation of material CLAY MINERALS AND THEIR SIGNIFICANCE content.
Cement slurry alkaline condition can be such that the ester bond in comb-shaped polymer hydrolyzes, and generate free phosphate anion
And HO-X-OH, wherein the minerals of free phosphate anion and cement grain outer surface or hyrate effect generate fine and close phosphorus
Silicate layer prevents hydrone from entering inside it, and constraint cement is normal hydrated, slows down its hydration rate, plays the effect protected and collapsed.
Free phosphate anion and the-COOH of release, which mutually act synergistically, simultaneously has diffusion to cement.And HO-X-OH is to cement
Aquation also has certain retarding action, and person's collective effect makes polycarboxylate water-reducer have more good performance.
Since phosphate is hydrophilic based polar very strong, it is adsorbed on the polycarboxylate water-reducer energy and hydrone of cement particle surface
One layer of stable solvation moisture film is formed, this layer of moisture film has good lubricating action, the cunning between cement granules can be effectively reduced
Dynamic resistance, to further increase the mobility of concrete.
Phosphate short-chain branch can be stretched in aqueous solution, can be formed with certain thickness in adsorbed cement particle surface
Hydrophily solid adsorption layer.When cement granules are close to each other, adsorption layer starts to be overlapped, i.e., space is generated between cement granules
Steric hindrance, overlapping is more, and steric hindrance repulsion is bigger, also bigger between the obstruction of cohesion cement granules, so that coagulation
The slump of soil keeps good.
Since sulfate ion can generate certain influence to cement, phosphate list is introduced on comb-shaped polymer main chain
Body can reduce influence of the sulfate ion to cement, so that the slump of concrete keeps good.
Methyl allyl polyoxyethylene ether can occur graft esterification with acrylic acid and react, and generate combed polymeric monomer.Methyl
Allyl polyethenoxy ether is nontoxic, nonirritant, has good water solubility, will not hydrolytic spoilage.And have with Multicomponent good
Good intermiscibility.It is used as main raw material(s) in polycarboxylic acid series cement water reducer, the efficient based water reducer of the polycarboxylic acids of synthesis has
Stronger cement granules dispersibility holding capacity, having product, volume is low, water-reducing rate is high, reinforcing effect is good, durability, stainless
Lose reinforcing bar and it is environmentally friendly the features such as.
Acrylic acid can provide Electrostatic Absorption group to polycarboxylic acids molecule, provide absorption driving force as comonomer,
In addition, acrylic acid also acts as telo merization, the effect of polyether macromonomer conversion power is improved.Acrylic acid is simplest insatiable hunger
And carboxylic acid, it is made of a vinyl and a carboxyl.
Mercaptopropionic acid is as chain-transferring agent, to improve methyl allyl polyoxyethylene ether and acroleic acid esterification graft reaction
The yield of efficiency and combed polymeric monomer.Mercaptopropionic acid can make the activated centre of acrylic acid free radical to sulfonic group, polyoxyethylene
Chain, phosphate group transfer, enable them to interphase distribution distribution, so that puts this these four monomer to good use completely writes synergistic effect.
Meanwhile the transfer in activated centre, the degree of polymerization can be reduced, the molecular weight distribution of water-reducing agent is adjusted.
Hydroxy-ethyl acrylate is a kind of monoesters, is generally dissolved in organic solvent, and miscible with water, copolymer can be used as fiber treatment
Agent, thermohardening lacquer, high bond strength adhesive, have both heat resistance and oil resistivity rubber (such as acrylic copolymer rubber),
Sheet processing agent, lube oil additive can be used as thickener with the copolymer of acrylamide, available with the copolymer of vinyl ethers
Substitute is obtained as floor wax, can be used as ion exchange resin etc. with the copolymer of divinylbenzene.It can be used in Radiation-curing system
Reactive diluent and crosslinking agent, adaptability, the workability of the water-reducing agent to improve water-reducing agent propose high-thin arch dam effect.
The present invention is further arranged to: the poly carboxylic acid series water reducer also includes following raw material: phosphate chain turns
Move agent 1.0-5.0 parts, 10-20 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 2-4 parts of the concentrated sulfuric acid, 10-50 parts of liquid alkaline.
By using above-mentioned technical proposal, its main component of naphthalene series high-efficiency water-reducing agent is beta-naphthalenesulfonic-acid salt formaldehyde condensation products,
A kind of non-air-entraining water-reducing agent, it is good to various cement adaptabilities, improve the operability of concrete, be widely used in highway,
The engineerings such as railway, bridge, tunnel, power station, dam, skyscraper.
Polycarboxylate water-reducer is after the ordinary water-reducing agent that calcium lignosulfonate is representative and using naphthalene system as the high efficiency water reducing agent of representative
The third generation high-performance water reducing agent to grow up is a kind of air-entraining water-reducing agent, is that forefront, scientific and technological content be most in the world at present
A kind of high, application prospect is best, comprehensive performance is optimal high efficiency water reducing agent.
But due to the respective characteristic of naphthalene water reducer and polycarboxylate water-reducer, two water-reducing agents, which cannot be used together or compound, to be made
With.In concrete production, if replacing product between the two serial water-reducing agents, all water-reducing agent storages, conveyance conduit,
Metering system and blender require thoroughly to clean, and otherwise can also seriously affect water-reducing agent using effect.
It can be reacted with acrylic acid the cation of generation by the way that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride is added
Polyelectrolyte, cationic polyelectrolyte can react with the beta-naphthalenesulfonic-acid salt formaldehyde condensation products in naphthalene series high-efficiency water-reducing agent,
Make polycarboxylate water-reducer and naphthalene water reducer no longer restriction or checking relation in five elements, can be compatible, certain compounding or mixing occurs, worker is facilitated to grasp
Make, increase adaptability, the workability of water-reducing agent, with the being adapted to sandstone higher situation of material CLAY MINERALS AND THEIR SIGNIFICANCE content, improves and protect
It collapses effect.
The present invention is further arranged to: the initiator includes hydrogen peroxide, ammonium persulfate, potassium peroxydisulfate and sodium peroxydisulfate
One or more of.
By using above-mentioned technical proposal, initiator is that one kind is easy to can be used for by the compound for being thermally decomposed into free radical
Cause alkenes, the free radical polymerization of double vinyl monomers and copolymerization, it can also be used to the crosslinking curing and height of unsaturated polyester (UP)
Molecule cross-link reaction.It selects redox system as initiator, the fault energy of polymerization reaction can be reduced, answered to compensate for and put
The reduction of rate reduces energy consumption.
The present invention is further arranged to: the reducing agent include sodium sulfite, sodium pyrosulfite, L-AA sodium one
Kind is a variety of.
By using above-mentioned technical proposal, reducing agent is to lose electronics in redox reaction or have electronics to deviate
Substance.Reducing agent itself has reproducibility, is oxidized, and product is oxidation product.Reduction carries out simultaneously with oxidation reaction,
I other words reducing agent is while with object progress oxidation reaction is reduced, itself is also oxidized, and becomes oxide.Contained
The raised reactant of the chemical valence of certain substance is reducing agent.Reducing agent is used cooperatively with initiator, generates redox system,
To reduce the fault energy of polymerization reaction, the reduction for answering rate is put to compensate for, reduces energy consumption.
The present invention is further arranged to: the phosphate chain-transferring agent includes sodium hypophosphite, sodium dihydrogen phosphate, tripolyphosphate
One of sodium is a variety of.
By using above-mentioned technical proposal, phosphate chain-transferring agent can play specific function to phosphate group, further mention
The grafting rate of high phosphate short-chain branch improves the polycarboxylate water-reducer content of phosphoric acid ester group.Also methacrylic polyoxy simultaneously
The yield of vinethene and acroleic acid esterification graft reaction efficiency and combed polymeric monomer, shifts activated centre, reduces polymerization
Degree, adjusts the molecular weight distribution of water-reducing agent.
Tripolyphosphate sodium water solution is in alkalescent (pH value of 1% aqueous solution is about 9.7), it is 4.3~14 ranges in PH
Water) in, form the effect of suspension (similar emulsion), i.e. peptizaiton.Sodium tripolyphosphate also can make liquid, solid particle more
Good is dissolved in liquid (such as water) medium, keeps solution appearance fully transparent, as true solution, here it is solubilizations.Three
Polyphosphate sodium can make the presence of retarder, and the slump retaining of cement can be improved, slow down and the cement solidifies.A kind of poly carboxylic acid series water reducer
Preparation method includes the following steps:
1) acrylic acid in raw material is divided into three parts；
2) by weight by methyl allyl polyoxyethylene ether, initiator, acrylated phosphate, phosphate chain-transferring agent,
1 part of acrylic acid in water and step 1, is added to reaction vessel, is reacted, and forms the first mixed liquor；
3) A material and B material is successively added in the first mixed liquor by weight, forms the second mixed liquor；A material includes acrylic acid
2 parts of acrylic acid in hydroxyl ethyl ester and step 1；B material includes mercaptopropionic acid and L-AA sodium；
4) MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and the concentrated sulfuric acid are successively added to the second mixed liquor by weight
In, it is reacted, forms third mixed liquor；
5) liquid alkaline is added by weight into third mixed liquor, adjusts the pH value of third mixed liquor, obtains the poly- carboxylic of liquid
Sour based water reducer.
By using above-mentioned technical proposal, in step 2, acrylated phosphate and phosphate chain-transferring agent is added, makes propylene
Phosphate-based in acid phosphoric acid ester as much as possible can be introduced in monomer, prevent that A material and B material are added in step 3
Afterwards, reaction is more to carry out methyl allyl polyoxyethylene ether to react with the graft esterification that acrylic acid occurs, and influences phosphate
The graft copolymerization of base and polymeric monomer causes the phosphate group content in polycarboxylate water-reducer to reduce.
B material is stagnant in step 3 expects to be added in A, prevents the free radical number decomposed on the high side, chain termination probability increases, and causes point
Son measures too low, the space steric effect disaccommodation of water-reducing agent, disperses performance degradation.
Cationic polyelectrolyte is prepared in step 4, cationic polyelectrolyte can be with β-naphthalene in naphthalene series high-efficiency water-reducing agent
Sulfonate and formaldehyde condensation product reacts, and makes polycarboxylate water-reducer and naphthalene water reducer no longer restriction or checking relation in five elements, can be compatible, occurs certain
Compounding or mixing, facilitate worker operation, increase adaptability, the workability of water-reducing agent, with clay pit in being adapted to sandstone material
The higher situation of object content, proposes high-thin arch dam effect.
In step 5, for adjusting the pH value of solution, the stability of water-reducing agent system is improved.
The present invention is further arranged to: the initiator includes hydrogen peroxide and ammonium persulfate, and the hydrogen peroxide, which accounts for, to be drawn
The 20-50% of agent total amount is sent out, the ammonium persulfate accounts for the 50-80% of initiator total amount.
By using above-mentioned technical proposal, hydrogen peroxide can generate hydroxyl free radical in the presence of high mild catalyst,
Cause monomer and carry out free radical polymerization, but hydrogen peroxide use will affect reaction conversion ratio and molecular weight of product, and then influence to subtract
The dispersion effect of aqua.When the dosage of hydrogen peroxide is less than 20%, the conversion ratio of reaction can be made to reduce, cause effectively containing for product
Amount is few, bad dispersibility.When the dosage of hydrogen peroxide is greater than 50%, the free radical trees that will lead to decomposition are on the high side, chain termination probability
Increase, cause molecular weight too low, the space steric effect disaccommodation of water-reducing agent disperses performance degradation.
The ammonium persulfate heated ammonium persulfate that easily decomposes soluble easily in water can be hydrolyzed into ammonium hydrogen sulfate and peroxidating in aqueous solution
Hydrogen.There is hydrogen peroxide by being added, the decomposition amount of ammonium persulfate can be reduced, improves the content of ammonium persulfate in aqueous solution,
To improve reaction conversion ratio and molecular weight of product.
The present invention is further arranged to: the reducing agent includes L-AA sodium.
By using above-mentioned technical proposal, ammonium persulfate and L-AA sodium redox system generated not only may be used
To improve reaction conversion ratio and molecular weight of product, water-reducing agent office obtained can also be made to have good initial paste flowing degree, and
It is preferable to flow retention property.
The present invention is further arranged to: the phosphate chain-transferring agent includes sodium tripolyphosphate.
By using above-mentioned technical proposal, sodium tripolyphosphate not only can be used as phosphate chain-transferring agent, to improve phosphoric acid
The grafting rate of ester short-chain branch is also used as the presence of retarder, and the slump retaining of cement can be improved, slow down and the cement solidifies.
In conclusion advantageous effects of the invention are as follows:
1. it is interlaced with polymeric monomer long-chain branch by introducing phosphate short-chain branch on polymeric monomer, increase water-reducing agent
Adaptability, workability propose high-thin arch dam effect with the being adapted to sandstone higher situation of material CLAY MINERALS AND THEIR SIGNIFICANCE content；
2. by be added MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride can react with acrylic acid generation sun from
Sub- polyelectrolyte, cationic polyelectrolyte can occur anti-with the beta-naphthalenesulfonic-acid salt formaldehyde condensation products in naphthalene series high-efficiency water-reducing agent
It answers, makes polycarboxylate water-reducer and naphthalene water reducer no longer restriction or checking relation in five elements, certain compounding or mixing can occur, facilitate worker operation,
Increase adaptability, the workability of water-reducing agent, with the being adapted to sandstone higher situation of material CLAY MINERALS AND THEIR SIGNIFICANCE content, proposes high-thin arch dam effect
Fruit；
3. by carrying out ammonium persulfate and hydrogen peroxide to be mixed with initiator, to improve reaction conversion ratio and product
Molecular weight can also make water-reducing agent obtained have good initial paste flowing degree, and it is preferable to flow retention property.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Referring to Fig.1, a kind of preparation method of poly carboxylic acid series water reducer, includes the following steps:
1) 126 parts of acrylic acid in raw material are divided into three parts；
2) by 370 parts of methyl allyl polyoxyethylene ethers, 0.42 part of hydrogen peroxide, 0.78 part of ammonium persulfate, 50 parts of propylene
1 part of acrylic acid in acid phosphoric acid ester, 3 parts of sodium tripolyphosphates, 425 parts of water and step 1 is added to reaction vessel, carries out anti-
It answers, forms the first mixed liquor；
3) A material and B material are successively added in the first mixed liquor, forms the second mixed liquor；A material includes 4 parts of acrylic acid hydroxyl second
2 parts of acrylic acid in ester and step 1；B material includes 0.9 part of mercaptopropionic acid and 1 part of L-AA sodium；
4) 15 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chlorides and 3 parts of concentrated sulfuric acids are successively added to the second mixed liquor
In, it is reacted, forms third mixed liquor；
5) mass concentration is added for 30 parts of liquid alkaline of 40% into third mixed liquor, the pH value of adjusting third mixed liquor obtains
To liquid poly carboxylic acid series water reducer.
Embodiment 2-5 the difference from embodiment 1 is that, each substance is as follows: in parts by weight in poly carboxylic acid series water reducer
Embodiment 6-14 the difference from embodiment 1 is that, initiator includes the raw material of following weight percent meter:
Embodiment 17-22 the difference from embodiment 1 is that, reducing agent includes the raw material of following weight percent meter:
| Embodiment | Sodium sulfite | Sodium pyrosulfite | L-AA sodium |
| Embodiment 17 | 0 | 100 | 0 |
| Embodiment 18 | 100 | 0 | 0 |
| Embodiment 19 | 40 | 60 | 0 |
| Embodiment 20 | 20 | 0 | 80 |
| Embodiment 21 | 0 | 30 | 70 |
| Embodiment 22 | 10 | 30 | 60 |
Embodiment 23-27 the difference from embodiment 1 is that, phosphate chain-transferring agent includes the original of following weight percent meter
Material:
| Embodiment | Sodium hypophosphite | Sodium dihydrogen phosphate | Sodium tripolyphosphate |
| Embodiment 23 | 100 | 0 | 0 |
| Embodiment 24 | 0 | 100 | 0 |
| Embodiment 25 | 40 | 60 | 0 |
| Embodiment 26 | 30 | 0 | 70 |
| Embodiment 27 | 0 | 35 | 65 |
| Embodiment 28 | 20 | 25 | 55 |
Comparative example 1-5:
Compare with embodiment 1, each substance is as follows: in parts by weight in poly carboxylic acid series water reducer
Comparative example 6: the difference from embodiment 1 is that, 3) B material and A material is successively added in the first mixed liquor by weight,
Form the second mixed liquor；A material includes 2 parts of acrylic acid in hydroxy-ethyl acrylate and step 1；B material includes mercaptopropionic acid and L-
Sodium ascorbate.
Comparative example 7: using poly carboxylic acid series water reducer common in the market: leading to memberization using the Jinan Tian Shuan Year in this comparative example
The polycarboxylic acid series high efficiency water reducing agent that work Co., Ltd produces, model 66-8.
Comparative example 8: using naphthalene water reducer common in the market: using Shanghai cloud wise man new material science and technology in this comparative example
The naphthalene series high-efficiency water-reducing agent that Co., Ltd produces, model FDN-C.
Comparative example 9: by the naphthalene series high-efficiency water-reducing agent and poly carboxylic acid series water reducer prepared in embodiment 1 in comparative example 8
It is compounded, the ratio between naphthalene series high-efficiency water-reducing agent and poly carboxylic acid series water reducer are 1:3.
Comparative example 10: by the naphthalene series high-efficiency water-reducing agent in the polycarboxylic acid series high efficiency water reducing agent and comparative example 8 in comparative example 7 into
Row compounding, the ratio between naphthalene series high-efficiency water-reducing agent and polycarboxylic acid series high efficiency water reducing agent are 1:3.
By the diminishing in water-reducing agent and comparative example 6-9 prepared by embodiment 1, embodiment 2, embodiment 5 and comparative example 1-5
Agent compares, and tests according to GB/T8077 flowing degree of net paste of cement and water reducing ratio of cement mortar, test cement is conch cement
42.5R, the ratio of mud 0.29, water-reducing agent volume are 0.6%.Concrete mix are as follows: cement 330kg/m3, sand 742kg/m3,
(nominal particle diameter is the rubble of 5mm-20mm to stone 1113kg/m3, and using graduation two, wherein 5mm-10mm accounts for 40%, 10mm-20mm
It accounts for 60%).Test results in the following table:
As seen from the above table, using the water-reducing agent prepared in 1-2 of the embodiment of the present invention and embodiment 5, cement paste, mortar
Water-reducing rate and 1 hour guarantor's plasticity are all better than comparative example 1, illustrate by introducing phosphate short-chain branch, Ke Yizeng on polymeric monomer
The water-reducing rate and guarantor's plasticity of big water-reducing agent, propose high-thin arch dam effect.
Comparative example 1 is compared with comparative example 2 it is found that phosphate chain-transferring agent, which is added, can be improved the grafting of phosphate short-chain branch
Rate improves the polycarboxylate water-reducer content of phosphoric acid ester group, to improve the water-reducing effect of water-reducing agent.
Comparative example 6 and embodiment 1 compare, and illustrate that A material is stagnant and expect to be added in B, the free radical number decomposed can be made on the high side, lead to chain
It terminates probability to increase, molecular weight is too low, the space steric effect disaccommodation of water-reducing agent, disperses performance degradation.
Embodiment 1, comparative example 7 and comparative example 8 are compared it is found that using the water-reducing agent prepared in the embodiment of the present invention, water
Cement paste, water reducing ratio of cement mortar and 1 hour guarantor's plasticity are all better than commonly uses water-reducing agent on the market, illustrates that addition phosphate short-chain branch can
To improve the water-reducing rate and slump holding capacity of water-reducing agent.
Comparative example 9 is compared with comparative example 10 it is found that can be made by the way that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride is added
Polycarboxylate water-reducer and naphthalene water reducer no longer restriction or checking relation in five elements, can be compatible, and certain compounding or mixing occurs, facilitates worker operation,
Adaptability, the workability for increasing water-reducing agent, when without replacing product between the two serial water-reducing agents, by all water-reducing agents
Storage, conveyance conduit, metering system and blender are thoroughly cleaned.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of poly carboxylic acid series water reducer, it is characterised in that: the poly carboxylic acid series water reducer includes following raw material: methyl
300-450 parts of allyl polyethenoxy ether, 100-150 parts of acrylic acid, 40-60 parts of acrylated phosphate, hydroxy-ethyl acrylate 2-6
Part, 0.5-2.0 parts of initiator, 0.5-1.5 parts of reducing agent, 0.3-1.5 parts of mercaptopropionic acid, 300-550 parts of water.
2. poly carboxylic acid series water reducer according to claim 1, it is characterised in that: the poly carboxylic acid series water reducer also include with
Lower raw material: 1.0-5.0 parts of phosphate chain-transferring agent, 10-20 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, dense sulphur
It is 2-4 parts sour, 10-50 parts of liquid alkaline.
3. poly carboxylic acid series water reducer according to claim 1, it is characterised in that: the initiator includes hydrogen peroxide, mistake
One or more of ammonium sulfate, potassium peroxydisulfate and sodium peroxydisulfate.
4. poly carboxylic acid series water reducer according to claim 1, it is characterised in that: the reducing agent includes sodium sulfite, coke
Sodium sulfite, L-AA sodium it is one or more.
5. poly carboxylic acid series water reducer according to claim 1, it is characterised in that: the phosphate chain-transferring agent includes time phosphorus
One of sour sodium, sodium dihydrogen phosphate, sodium tripolyphosphate are a variety of.
6. a kind of preparation method of poly carboxylic acid series water reducer, which comprises the steps of:
1) acrylic acid in raw material is divided into three parts；
2) by weight by methyl allyl polyoxyethylene ether, initiator, acrylated phosphate, phosphate chain-transferring agent, water, with
And 1 part of acrylic acid in step 1, it is added to reaction vessel, is reacted, the first mixed liquor is formed；
3) A material and B material is successively added in the first mixed liquor by weight, forms the second mixed liquor；A material includes acrylic acid hydroxyl second
2 parts of acrylic acid in ester and step 1；B material includes mercaptopropionic acid and L-AA sodium；
4) successively MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and the concentrated sulfuric acid are added in the second mixed liquor by weight, into
Row reaction, forms third mixed liquor；
5) liquid alkaline is added by weight into third mixed liquor, adjusts the pH value of third mixed liquor, obtains the polycarboxylic-acid of liquid
Water-reducing agent.
7. the preparation method of poly carboxylic acid series water reducer according to claim 6, it is characterised in that: the initiator included
Hydrogen oxide and ammonium persulfate, the hydrogen peroxide account for the 20-50% of initiator total amount, and the ammonium persulfate accounts for initiator total amount
50-80%。
8. the preparation method of poly carboxylic acid series water reducer according to claim 6, it is characterised in that: the reducing agent includes L-
Sodium ascorbate.
9. the preparation method of poly carboxylic acid series water reducer according to claim 6, it is characterised in that: the phosphate chain tra nsfer
Agent includes sodium tripolyphosphate.
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| CN117105569A (en) * | 2023-09-22 | 2023-11-24 | 湖南湘鑫科贸发展有限公司 | Polycarboxylate superplasticizer and preparation method thereof |
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