CN105294920B - A kind of preparation method of high water absorbency polymer - Google Patents
A kind of preparation method of high water absorbency polymer Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000007864 aqueous solution Substances 0.000 claims abstract description 26
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- 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 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000004094 surface-active agent Substances 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 239000003505 polymerization initiator Substances 0.000 claims abstract description 8
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 7
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 6
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 6
- 238000007605 air drying Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 9
- 239000000194 fatty acid Substances 0.000 claims description 9
- 229930195729 fatty acid Natural products 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 9
- -1 sorbitan fatty acid ester Chemical class 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000005213 imbibition Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 claims 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract description 8
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 abstract description 6
- 235000011187 glycerol Nutrition 0.000 abstract description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000243 solution Substances 0.000 abstract description 4
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 abstract description 3
- 229940070765 laurate Drugs 0.000 abstract description 3
- 239000000499 gel Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 5
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- UWLPCYBIJSLGQO-UHFFFAOYSA-N dodecanoic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.CCCCCCCCCCCC(O)=O UWLPCYBIJSLGQO-UHFFFAOYSA-N 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- 235000019394 potassium persulphate Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- HSRJKNPTNIJEKV-UHFFFAOYSA-N Guaifenesin Chemical compound COC1=CC=CC=C1OCC(O)CO HSRJKNPTNIJEKV-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 239000002211 L-ascorbic acid Substances 0.000 description 1
- 235000000069 L-ascorbic acid Nutrition 0.000 description 1
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 description 1
- 241000220324 Pyrus Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- GTTSNKDQDACYLV-UHFFFAOYSA-N Trihydroxybutane Chemical compound CCCC(O)(O)O GTTSNKDQDACYLV-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- ZPIZRHAHXTZZPJ-UHFFFAOYSA-N methanol;propane Chemical compound OC.CCC ZPIZRHAHXTZZPJ-UHFFFAOYSA-N 0.000 description 1
- 235000021017 pears Nutrition 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000012805 post-processing Methods 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
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 239000012966 redox initiator Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Polymerisation Methods In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a kind of preparation method of high water absorbency polymer, the polymers compositions（By weight）：40~45 grams of acrylic acid, 55~60 grams of water, 19.28~20.5 grams of sodium hydroxide, N, 0.01~0.02 gram of two acrylamide of N ' di-2-ethylhexylphosphine oxides, 1~2 gram of 3% persulfate aqueous solution, sorbitan glycerine -0.05~0.1 gram of laurate fat, 1~2 gram of 3% persulfate aqueous solution；Preparation process is as follows：Acrylic acid aqueous solution concentration 55~60%；Crosslinking agent, surfactant, polymerization initiator are added to acrylic acid aqueous solution, it is blown into nitrogen, this solution is sent into agitator with 250g/min feed speed, 3% aqueous solution of sodium bisulfite is sent into by agitator with 6~10g/min feed speed simultaneously, the agitated mixed material of device flows rapidly into helix extrusion device and polymerize, temperature control is in 103 DEG C, aqueous gel polymer is discharged to outside pressurizing unit, 160 DEG C of heated-air dryings are crushed, high water absorbency polymer is obtained, product quality is stable, improves yield, manpower is saved, efficiency is improved.
Description
Technical field
The present invention relates to new functional macromolecule material technical field, a kind of high water absorbency polymer is related in particular to
Preparation method.
Background technology
More fall behind it is well known that producing similar water-absorbing resin product processes at present, it is general using plastic pallet dress
Polymerization, endless belt polymerization and Dual-arm kneader polymerization etc. are put, process above method has many unfavorable factors.
The method of existing plastic pallet device polymerization, product polymerization is uneven, and adhesion plastic pallet, production equipment has adhesion
Etc. phenomenon, moreover, material leakage causes environmental pollution, polymerization space is big, and need to use substantial amounts of manpower.
In addition, the method polymerizeing on endless belt, the former degree of the monomer aqueous solution is restricted, the yield and sky of polymer
Between --- time yield is relatively low.Due to being intermittent operation, operating condition is poor, yield is relatively very low, and aqueous to what is obtained
Gelatinous polymer also needs the later stage to carry out slitting extrusion, crushes, the process such as granulation, during post-processing, the aqueous gel polymer
With very big caoutchouc elasticity.Therefore, mechanically cutting and extrude when crushing needs many energy, also needs to use a large amount of people
Power.
The method that monomer solution is carried out to batch polymerization with Dual-arm kneading machine, is to utilize the rotation of kneading machine agitating shaft
Shearing force, required particle diameter is ground into by product, and this, which not only wastes time and energy, can also reduce space-time yield.
The content of the invention
The invention aims to overcome the problem of prior art is present to polymerize there is provided a kind of continuous high-hydroscopicity for preparing
The method of thing, by polymerizable monomer, polymerization initiator, the water soluble mixt of the composition such as lipophilic surfactant and crosslinking agent
It is continuously fed in vertical double-shaft spiral pressurizing unit, prepares high water absorbency polymer, product quality is stable, is not required to huge set
It is standby, capacity and output is improved, later stage slitting is reduced, extrudes, the process such as granulation saves manpower, improves efficiency.
The technical solution adopted by the present invention, a kind of preparation method of high water absorbency polymer, high water absorbency polymer is under
The component composition stated（By weight）：
Polymerizable monomer：40~45 grams of acrylic acid
55~60 grams of water
19.28~20.5 grams of sodium hydroxide
Crosslinking agent：N, N ' 0.01~0.02 gram of two acrylamide of di-2-ethylhexylphosphine oxide
Polymerization initiator：3% 1~2 gram of persulfate aqueous solution
Surfactant：Sorbitan glycerine -0.05~0.1 gram of laurate fat
3% 1~2 gram of persulfate aqueous solution
Its preparation process is as follows：
1）Prepare acrylic acid aqueous solution：40~45 grams of acrylic acid, adds 55~60 grams of water, sodium hydroxide 19.28~20.5
Gram, acrylic acid degree of neutralization is 75~80%, and it is 55~60% to be prepared into acrylic acid aqueous solution concentration；
2）Prepare high water absorbency polymer：Crosslinking agent ethylene glycol diglycidyl acid fan 0.01 is added to acrylic acid aqueous solution
~0.02 gram, surfactant sorbitan glycerine -0.05~0.1 gram of laurate fat is added, polymerization initiator is added：
3% 1~2 gram of persulfate aqueous solution；Above-mentioned component is blown into nitrogen, the aqueous solution is continuous with 230~250g/min feed speed
It is sent in mixing agitator, while with the speed of 6g/ minutes by 3%（Weight）Aqueous solution of sodium bisulfite is sent to mixing
In device, mixed material is flowed rapidly into helix extrusion device, and the bushing temperature requirement of pressurizing unit is less than 103 DEG C,
Propeller rotating speed is 25~30 revs/min, and the moisture content that the reacting heat evaporation in polymerization process goes out is discharged by blow vent, aqueous
Gelatin polymer is squeezed pressure device outlet extrusion, forms water imbibition gel；
3）The aqueous gel polymer of above-mentioned discharge is crushed with 140~160 DEG C of heated-air dryings, that is, water-absorbing resin is made.
In such scheme, the polymerizable monomer can be one or two or more kinds of groups in acrylates, acrylamide
Into.
In such scheme, the crosslinking agent can be ethylene glycol diglycidylether, polyethyleneglycol diglycidylether, three
The polyepoxides such as methanol propane triglycidyl ether, the glycidol ether of D-sorbite four, the glycidol ether of D-sorbite six
In one or two or more kinds of mixtures.
In such scheme, the polymerization initiator is water-soluble radical polymerization initiator, can be persulfate, peroxide
Change one kind in hydrogen, or the redox initiator combined with sulphite, bisulfites, L-ascorbic acid.
In such scheme, the surfactant is lipophilic surfactant, can be sorbitan fatty acid ester, mountain
One kind in pears sugar alcohol fatty acid ester, glycerine fatty acid fat.
The beneficial effects of the present invention are：
1st, the preparation method of high water absorbency polymer of the invention, using polymerized monomer and addition crosslinking, polymerization initiator,
The aqueous solution of the components such as surfactant, it is agitated, add aqueous solution of sodium bisulfite reducing agent and continuously sent with certain speed
To high water absorbency polymer helix extrusion device, by polymer reactor, continuous extrusion aqueous gel shaped polymer is through with 150 DEG C
Heated-air drying is crushed, and classifying screen obtains the particulate resins polymerizeing for the first time, is reduced later stage slitting, is extruded, and the process such as granulation is saved
A large amount of manpowers, improve operating efficiency, and continuous production improves production yields.
2nd, crosslinking agent is used in the preparation method of high water absorbency polymer of the present invention for N, N-methylene-bisacrylamide,
Ethylene glycol diglycidylether, polyethyleneglycol diglycidylether, trihydroxymethyl propane triglycidyl ether, D-sorbite four shrink
The polyepoxides such as glycerin ether, the glycidol ether of D-sorbite six, can also use more than two kinds mixtures, with high-hydroscopicity
The water absorbing capacity of polymer, gel strength, water soluble amount is related；The surfactant used is lipophilic surfactant, such as
Sorbitan fatty acid ester, sorbitan fatty acid ester, glycerine fatty acid fat etc., to improve the water absorbing capacity of water absorbent polymer
Power, water soluble amount, sorbitan fatty acid ester wherein sorbitan glycerine-laurate fat is better.
3rd, the high water absorbency polymer preparation method that the present invention is used, inert atmosphere is kept in Raolical polymerizable,
It is blown into nitrogen and carries out deoxidation treatment, inside inert gas replacement polymer reactor, in the course of the polymerization process, due to polymerization reaction heat
The moisture being evaporated is that blow vent to be passed through is condensed into reflux cooler；Either introduce inert gas into polymerisation
In device, moisture content is discharged to by blow vent outside system, for the ease of the aqueous mixture used in the heating present invention, or be easy to
Remove polymerization reaction heat.
4th, the preparation method of high water absorbency polymer of the present invention sends into pressurizing unit using polymer, and its temperature control exists
In 105 DEG C, so that wall temperature is adjusted to polymerization temperature in extruder, and propeller is started, be adjusted to fixed rotation number, along with
Polymerisation, will generate the part in aqueous gel shaped polymer, be allowed to be discharged outside by kick-off in evaporation, and not have
Have and produce the phenomenon adhered on pressurizing unit inwall and propeller of aqueous gel polymer, moisture content is then by blow vent and aqueous
The outlet discharge of gelatinous polymer, while in the course of the polymerization process, controlling the feed speed of the aqueous mixture, it is to avoid extruding
In full liquid status inside machine.
Embodiment
With reference to embodiment, the present invention is further described.
Embodiment 1：
A kind of preparation method of high water absorbency polymer, during acrylic acid used is 80% part neutralized by sodium hydroxide
And acrylic acid, neutralize acrylic acid with the part and prepare water-soluble serous 100 parts, its concentration of acrylic acid is 59.4%, past above-mentioned
In 100 parts of acrylic monomers aqueous solution, 0.006 part of N, the acrylamide of N ' di-2-ethylhexylphosphine oxides two, 0.2 part of potassium peroxydisulfate and 1.6 are inserted
Part sorbitan glycerine-laurate, be modulated into it is water-soluble serous after, be blown into nitrogen and carry out deoxidation treatment, then lightly stir
Nitrogen " bubbling " is mixed and stirred, agitator is sent into 250g/min feed speed, while with the feed speed of 6g/ minutes by 3% sulfurous
In sour hydrogen sodium water solution feeding agitator（Constant displacement pump is used respectively）, pulp aqueous mixture is done, by the pulpous state aqueous mixture
Continuous to be sent to screw extruder, helix extrusion device bushing temperature is heated to 80 DEG C, and propeller rotation number is 30 revs/min.
Be continuously fed into the aqueous mixture in pressurizing unit, start after about 35 seconds polymerization become aqueous gel shape gather
Compound, is about detained after 3 minutes in pressurizing unit, becomes the fragment that moisture content is 25 ~ 30% and ejects, in polymerization process
In the moisture that is evaporated due to reaction heat, discharged by blow vent, the outlet of aqueous gel polymer is discharged to extruding dress
Outside is put, the phenomenon that aqueous gel shaped polymer adheres on pressurizing unit inwall and propeller is not at this moment almost produced.
The aqueous gel shaped polymer ejected is crushed with 150 DEG C of heated-air dryings, classifying screen obtains the particle polymerizeing for the first time
Shape resin, water absorbent rate（0.9% physiology stays water）For such as table 1.
Embodiment 2
A kind of preparation method of high water absorbency polymer, acrylic acid used is 80%, the propylene neutralized by sodium hydroxide
Acid, neutralizes acrylic acid with the part and prepares water-soluble serous 100 parts（Weight）, wherein monomer concentration is 59.4%（Weight）.Then, up
State 100 parts（Weight）In water-soluble serous, 0.03 part is inserted（Weight）Ethylene glycol diglycidyl acid is confused and 0.2 part（Weight）Potassium peroxydisulfate and
1.6 part（Weight）Sorbitan GML fat, is modulated into after aqueous mixture, is blown into nitrogen and carries out deoxidation treatment,
Then, " bubbling " lightly is stirred, sends into it in helix extrusion device so that 250g/min feed speed is continuous.While with
The speed of 6g/ minutes is by 3%（Weight）In aqueous solution of sodium bisulfite feeding agitator（Constant displacement pump is used respectively）, do pulp aqueous
Mixture hands over pulpous state aqueous mixture to be continuously introduced into helix extrusion device, and at this moment the bushing temperature requirement of pressurizing unit is 105 DEG C
Hereinafter, propeller rotating speed is 30 revs/min.
The aqueous mixture in pressurizing unit is continuously fed into, about 35 start to polymerize and generate aqueous gel shape later
Polymer, is about detained after 3 minutes in pressurizing unit, becomes the fragment that moisture content is 20 ~ 25% and ejects.It was polymerizeing
The moisture content being evaporated in journey due to reaction heat, is discharged by blow vent, and discharge row's mouth of aqueous gel shaped polymer is discharged to
Outside pressurizing unit, at this moment almost do not produce that aqueous gel polymer adheres on pressurizing unit inwall and propeller shows
As.
By the aqueous gel shaped polymer ejected with 150 DEG C of air drier drying and crushings, screening after polymerize for the first time
Particulate resins, its water-absorbing resin water absorbent rate（0.9% physiological saline）For such as table 1.
Result of calculation is listed in the result that result in table 1, table is 30 hours METHOD FOR CONTINUOUS DETERMINATIONs, makees at the time of normal operation with entering
For starting point, then sampled every 3 hours, its measurement result is as follows：
The particulate resins test result that table 1 polymerize for the first time
The particulate resins that embodiment 1 polymerize for the first time are averagely weighed 11 parts, after being well mixed, take wherein 100g to carry out two
Subsurface processing（The 300 turns of additions 1g per minute homemade crosslinking agent 3g of silica, 0.6g ethanol under stirring condition）Afterwards,
It is placed in 150 DEG C of air dry ovens and dries to constant weight, be cooled to room temperature, obtains super absorbent resin fat prod, test data such as table two.
The particulate resins of the first cold polymerization of embodiment 2 are averagely weighed 11 parts, after being well mixed, take wherein 100g to carry out two
Subsurface processing,（300 turns per minute under stirring condition, 1g silica, the homemade crosslinking agents of 0.6g, 3g ethanol are added）
Afterwards, it is placed in 150 DEG C of air dry ovens and dries to constant weight, be cooled to room temperature, obtains super absorbent resin fat prod, test data such as table 2.
The high hydroscopic resin product test result of table 2
Claims (1)
1. a kind of preparation method of high water absorbency polymer, it is characterised in that：High water absorbency polymer is made up of following components：
Polymerizable monomer：40~45 grams of acrylic acid
55~60 grams of water
19.28~20.5 grams of sodium hydroxide
Crosslinking agent：N, N ' 0.01~0.02 gram of-methylene-bisacrylamide
Polymerization initiator：3% 1~2 gram of persulfate aqueous solution
Surfactant：0.05~0.1 gram of sorbitan fatty acid ester
3% 1~2 gram of aqueous solution of sodium bisulfite
Its preparation process is as follows：
1）Prepare acrylic acid aqueous solution：40~45 grams of acrylic acid, adds 55~60 grams of water, 19.28~20.5 grams of sodium hydroxide, third
Olefin(e) acid degree of neutralization is 75~80%, and it is 55~60% to be prepared into acrylic acid aqueous solution concentration；
2）Prepare high water absorbency polymer：To acrylic acid aqueous solution add crosslinking agent N, N ' methylene-bisacrylamide 0.01~
0.02 gram, 0.05~0.1 gram of surfactant sorbitan fatty acid ester is added, polymerization initiator is added：3% persulfuric acid
1~2 gram of aqueous solutions of potassium；Nitrogen is blown into above-mentioned component, the aqueous solution is continuously fed to mix with 230~250g/min feed speed
Close in agitator, while 3% aqueous solution of sodium bisulfite is sent in mixing agitator with the speed of 6g/ minutes, it is mixed
Material is flowed rapidly into helix extrusion device, and the bushing temperature requirement of pressurizing unit is less than 103 DEG C, and propeller rotating speed is 25
~30 revs/min, the moisture content that the reacting heat evaporation in polymerization process goes out is discharged by blow vent, and aqueous gel polymer is squeezed
Pressure device outlet is extruded, and forms water imbibition gel；
3）The water imbibition gel of above-mentioned discharge is crushed with 140~160 DEG C of heated-air dryings, that is, water-absorbing resin is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510908966.XA CN105294920B (en) | 2015-12-10 | 2015-12-10 | A kind of preparation method of high water absorbency polymer |
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