CN1129628C - Crosslinking agent and prepn of high-hydroscopicity resin thereof - Google Patents
Crosslinking agent and prepn of high-hydroscopicity resin thereof Download PDFInfo
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- CN1129628C CN1129628C CN 01136626 CN01136626A CN1129628C CN 1129628 C CN1129628 C CN 1129628C CN 01136626 CN01136626 CN 01136626 CN 01136626 A CN01136626 A CN 01136626A CN 1129628 C CN1129628 C CN 1129628C
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Abstract
The present invention relates to a crosslinking agent and a preparation method of a high water absorbent resin thereof. Firstly, polyethylene glycol with the molecular weight of 200 to 1500 is decompressed and distilled, and reacts with sodium metal powders to obtain polyethylene glycol sodium; then, chloroform is used as a solvent, and the polyethylene glycol sodium and acrylyl chloride react under a certain closed condition. Reactants are filtered, decompressed and distilled to obtain the crosslinking agent, acrylic acid macrogol ester with different molecular weight. Subsequently, deionized water is added into monomer acrylic acid, sodium hydroxide is used for partial neutralization, 2-methyl-(2-acrylamide) sodium propane-sulfonate is added, nitrogen gas is introduced, and the crosslinking agent is added. Finally, peroxide initiators are added for reaction, and the high water absorbent resin can be prepared. The crosslinking agent has the advantages of long molecular chain and moderate activity. The high water absorbent resin of the crosslinking agent has the advantages of homogeneous crosslink, fewer linear soluble polymers, high water absorption speed and high salt water absorption rate, and has the advantage that when salt water is absorbed to saturation, hydrogel still has certain strength.
Description
Technical field:
The present invention relates to a kind of linking agent and utilize this linking agent to prepare the method for super absorbent resin, belong to macromolecular material
Technical field.
Background technology:
High absorbency material is a kind of functional high molecule material that can absorb the deadweight hundreds of to thousands of times of water, and recent two decades has been obtained fast development.Wherein, linking agent is the important component of preparation high absorbency material, greatly affects the water absorbing properties of high absorbency material.Linking agent is the compound that contains two or more reactive functional, can be by condensation or crosslinked other monomer of radical polymerization mode.The present numerous vinyl linking agents that use, as (methyl) allyl acrylate, polyethylene (methyl) acrylate, N-methyl-N-vinyl acrylamide, to the benzene divinyl, two (methyl) acrylamides of methylene (second) base, two (methyl) vinylformic acid trihydroxymethylpropanyl ester, N, N-diallyl acrylamide, acetic acid diallyl oxygen base ester, two (methyl) vinylformic acid glycol ester, triallylamine, three (methyl) vinylformic acid trihydroxymethylpropanyl ester, three (methyl) vinylformic acid glycerine ester, vinylformic acid methacrylic acid glycerine ester, nitrile acid triallyl ester, (phosphoric acid) isonitrile acid triallyl ester, tetraene propoxy-ethane, four (methyl) vinylformic acid pentaerythritol ester and six (methyl) vinylformic acid dipentaerythritol ester etc., the shortcoming of these linking agents is that molecular chain is short, reactive behavior is very high, initial reaction stage cross-linking density height, the reaction later stage is seldom crosslinked, the main line style soluble polymer that generates, the coated polymer gel, cause its water absorbing properties poor. document (D J Arriola, SS Cuti é, D E Henton et al.Journal of Applied Polymer science, 1997,63 (4): disclose a kind of method for preparing super absorbent resin 439), cause crosslinked inhomogeneous and crosslinked grid little, therefore, be difficult to obtain the good super absorbent resin of water absorbing properties.
Use linking agent methylene radical-bisacrylamide commonly used at present, super absorbent resin as vinylformic acid and acrylamide binary copolymerization preparation among clear 60-161409 of JP and the US4525527, water absorbent rate to distilled water and 1% sodium chloride brine is respectively 600-1300g/g and 50-100g/g, and the reaction times needs more than 4 hours; Adopt the high energy of super absorbent resin of starch graft acrylic acid preparation to absorb the distilled water of about 2000 times of deadweights among the CN85103771; (Journal ofApplied Polymer Science such as Wen-Fu Lee, 1997,64 (9): 1701 ~ 1712) water absorbent rate of super absorbent resin in deionized water and 0.9% sodium chloride brine with vinylformic acid and 3-dimethyl-(2-methylacryoyloxyethyl) ammonium propane sulfonic acid sodium preparation is respectively 1435g/g and 96g/g.
Summary of the invention:
The purpose of this invention is to provide a kind of linking agent and utilize this linking agent to prepare the method for super absorbent resin, be intended to prepare molecular chain length difference, homologue linking agent that reactive behavior is moderate, and be used for the preparation of super absorbent resin, to overcome the deficiency of existing linking agent, prepare the good and high absorbency material that regulate and control easily of water absorbing properties quickly and easily, to satisfy the demand in different application field.
The preparation of a kind of linking agent of the present invention and super absorbent resin thereof, its preparation method are the linking agent diacrylate macrogol esters that at first prepares different molecular weight, utilize this linking agent super absorbent resin then, and its concrete grammar carries out as follows:
(1) moisture content is removed in a certain amount of polyoxyethylene glycol underpressure distillation of molecular weight 200-1500, and sodium Metal 99.5 powder in molar ratio 1: 2-4 is dosed in the reactor, and magnetic agitation was reacted 1-3 hour, separates to obtain polyoxyethylene glycol sodium;
(2) with the chloroform be solvent, with polyoxyethylene glycol sodium and acrylate chloride in molar ratio 1: 2-3 renders in the reactor, magnetic agitation, under 20-50 ℃ condition confined reaction 4-8 hour;
(3) above-mentioned reactant is filtered, remove the sodium-chlor that generates in the dereaction, unreacted acrylate chloride and solvent are removed in underpressure distillation again, make colourless viscous liquid, are the linking agent diacrylate macrogol ester of different molecular weight.
The method of utilizing made linking agent diacrylate macrogol ester to prepare High hydrophilous resin is carried out as follows:
(1) in monomer vinylformic acid, adds its volume 0.5-6 deionized water doubly, partly be neutralized into the acrylic acid solution that degree of neutralization is 40-80% with sodium hydroxide, press 1 in part neutral acrylic acid solution: 0-5 adds 2-methyl-(2-acrylamido) propane sulfonic acid sodium, logical nitrogen, nitrogen flow 15-50L/h stirs;
(2) in above-mentioned reaction soln, add the linking agent diacrylate macrogol ester of the different molecular weight of monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.02-0.5% again, stir;
(3) add the peroxide initiator of monomer total mass 0.05-1% at last, stir, reaction is 0.5-2 hour under the 50-80 ℃ of condition, product is taken out from reactor, 100 ± 5 ℃ constant temperature 1-2 hour, powder carefully obtains super absorbent resin.
Wherein the peroxide initiator in the step (3) can be any one in Sodium Persulfate, Potassium Persulphate, ammonium persulphate, hydrogen peroxide, tertbutyl peroxide and the isopropyl benzene hydroperoxide.
The super absorbent resin of linking agent of the present invention and preparation thereof, its advantage is:
(1) abundant raw material of linking agent is easy to get, and the preparation method is simple, and is active moderate, and it is convenient to store.
(2) molecular chain of linking agent is long more, and the crosslinked grid of super absorbent resin is big more, and the water that holds is many more, so the water absorbent rate of super absorbent resin is high more.
(3) super absorbent resin is crosslinked even, and the line style soluble polymer is few, and absorption speed is fast.
(4) water absorbent rate of super absorbent resin in deionized water and 0.9% sodium chloride solution is respectively 1600-4010g/g and 92-260g/g, can require the super absorbent resin of preparation expectation quickly and easily according to different water absorbing properties.
(5) the suction salt solution multiplying power height of super absorbent resin is inhaled salt solution and is reached when saturated, and hydrogel still has certain intensity.
(6) preparation of super absorbent resin can be finished with interior at 2 hours, and its reaction times is short, yield is high, easy drying and pulverizing, helps reducing production costs.
Description of drawings:
Fig. 1 is the synthetic slightly line synoptic diagram of linking agent.
Fig. 2 be super absorbent resin in deionized water and 0.9%NaCl water absorbent rate and the graph of relation between the cross-linker molecules amount.
Embodiment:
1. the preparation of linking agent
Embodiment 1:
Moisture content is removed in the polyoxyethylene glycol underpressure distillation of molecular weight 200, be dosed in the reactor in 1: 2 in molar ratio with the sodium Metal 99.5 powder, magnetic agitation was reacted 2 hours, separated to obtain polyoxyethylene glycol sodium.Be solvent then with the chloroform, polyoxyethylene glycol sodium and acrylate chloride were rendered in the reactor in 1: 2.2 in molar ratio, magnetic agitation, 20 ℃ of confined reactions 4 hours, remove by filter the sodium-chlor that reaction generates, unreacted acrylate chloride and solvent are removed in underpressure distillation again, make colourless viscous liquid linking agent diacrylate macrogol ester.
Embodiment 2:
Moisture content is removed in the polyoxyethylene glycol underpressure distillation of molecular weight 1000, be dosed in the reactor in 1: 3 in molar ratio with the sodium Metal 99.5 powder, magnetic agitation was reacted 2.5 hours, separated to obtain polyoxyethylene glycol sodium.Be solvent then with the chloroform, polyoxyethylene glycol sodium and acrylate chloride were rendered in the reactor in 1: 2.6 in molar ratio, magnetic agitation, 30 ℃ of confined reactions 7 hours, remove by filter the sodium-chlor that reaction generates, unreacted acrylate chloride and solvent are removed in underpressure distillation again, make colourless viscous liquid linking agent diacrylate macrogol ester.
Embodiment 3:
Moisture content is removed in the polyoxyethylene glycol underpressure distillation of molecular weight 1500, be dosed in the reactor in 1: 2.5 in molar ratio with the sodium Metal 99.5 powder, magnetic agitation was reacted 3 hours, separated to obtain polyoxyethylene glycol sodium.Be solvent then with the chloroform, polyoxyethylene glycol sodium and acrylate chloride were rendered in the reactor in 1: 3 in molar ratio, magnetic agitation, 50 ℃ of confined reactions 8 hours, remove by filter the sodium-chlor that reaction generates, unreacted acrylate chloride and solvent are removed in underpressure distillation again, make colourless thick linking agent diacrylate macrogol ester.
2. the preparation of super absorbent resin
Embodiment 1:
The deionized water that in monomer vinylformic acid, adds 0.5 times of its volume, partly being neutralized to degree of neutralization with sodium hydroxide is 50% acrylic acid solution, in part neutral acrylic acid solution, press and add 2-methyl-(2-acrylamido) propane sulfonic acid sodium at 1: 0.1, logical nitrogen, nitrogen flow 20L/h, stir, the linking agent diacrylate macrogol ester (molecular weight polyethylene glycol 1500) that adds monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.3% again, stir, the ammonium persulphate that adds monomer total mass 0.1% at last, stir, 55 ℃ were reacted 2 hours, product is taken out from reactor, 100 ± 5 ℃ of constant temperature 1 hour, powder carefully obtains super absorbent resin.Record water absorbent rate 3830g/g in deionized water, the water absorbent rate 106g/g in 0.9% sodium chloride brine with weighting method.
Embodiment 2:
The deionized water that in vinylformic acid, adds 1 times of its volume, partly being neutralized to degree of neutralization with sodium hydroxide is 60% acrylic acid solution, in part neutral acrylic acid solution, press and add 2-methyl-(2-acrylamido) propane sulfonic acid sodium at 1: 1, logical nitrogen, nitrogen flow 15L/h, stir, the linking agent diacrylate macrogol ester (molecular weight polyethylene glycol 1000) that adds monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.4% again, stir, the Potassium Persulphate that adds monomer total mass 0.3% at last, stir, 60 ℃ were reacted 1 hour, product is taken out from reactor, 100 ± 5 ℃ of constant temperature 1.5 hours, powder carefully obtains super absorbent resin.Record water absorbent rate 3520g/g in deionized water, the water absorbent rate 260g/g in 0.9% sodium chloride brine with weighting method.
Embodiment 3:
The deionized water that in monomer vinylformic acid, adds 3 times of its volumes, partly being neutralized to degree of neutralization with sodium hydroxide is 80% acrylic acid solution, in part neutral acrylic acid solution, press and add 2-methyl-(2-acrylamido) propane sulfonic acid sodium at 1: 3, logical nitrogen, nitrogen flow 30L/h, stir, the linking agent diacrylate macrogol ester (molecular weight polyethylene glycol 200) that adds monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.02% again, stir, the Sodium Persulfate that adds monomer total mass 0.5% at last, stir, 70 ℃ were reacted 1 hour, product is taken out from reactor, 100 ± 5 ℃ of constant temperature 2 hours, powder carefully obtains super absorbent resin.Record water absorbent rate 1600g/g in deionized water, the water absorbent rate 165g/g in 0.9% sodium chloride brine with weighting method.
Embodiment 4:
The deionized water that in vinylformic acid, adds 5 times of its volumes, partly being neutralized to degree of neutralization with sodium hydroxide is 80% acrylic acid solution, in part neutral acrylic acid solution, press and add 2-methyl (2-acrylamido) propane sulfonic acid sodium at 1: 5, logical nitrogen, nitrogen flow 40L/h, stir, the linking agent diacrylate macrogol ester (molecular weight polyethylene glycol 600) that adds monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.06% again, stir, the ammonium persulphate that adds monomer total mass 0.8% at last, stir, 80 ℃ were reacted 40 minutes, product is taken out from reactor, 100 ± 5 ℃ of constant temperature 2 hours, powder carefully obtains super absorbent resin.Record water absorbent rate 2480g/g in deionized water, the water absorbent rate 238g/g in 0.9% sodium chloride brine with weighting method.
Embodiment 5:
The deionized water that in monomer vinylformic acid, adds 6 times of its volumes, partly being neutralized to degree of neutralization with sodium hydroxide is 70% acrylic acid solution, logical nitrogen, nitrogen flow 15L/h, stir, the linking agent diacrylate macrogol ester (molecular weight polyethylene glycol 1400) that adds monomer vinylformic acid and 2-methyl-(2-acrylamido) propane sulfonic acid sodium total mole number 0.05% again, stir, the Potassium Persulphate that adds monomer total mass 0.4% at last, stir, 65 ℃ were reacted 1.5 hours, product are taken out from reactor, 100 ± 5 ℃ of constant temperature 1.5 hours, powder carefully obtains super absorbent resin.Record water absorbent rate 4010g/g in deionized water, the water absorbent rate 92g/g in 0.9% sodium chloride brine with weighting method.
Claims (1)
1. the preparation method of a linking agent, this method is carried out as follows:
(1) moisture content is removed in a certain amount of polyoxyethylene glycol underpressure distillation of molecular weight 200-1500, and sodium Metal 99.5 powder in molar ratio 1: 2-4 is dosed in the reactor, and magnetic agitation was reacted 1-3 hour, separates to obtain polyoxyethylene glycol sodium;
(2) with the chloroform be solvent, with polyoxyethylene glycol sodium and acrylate chloride in molar ratio 1: 2-3 renders in the reactor, magnetic agitation, under 20-50 ℃ condition confined reaction 4-8 hour;
(3) above-mentioned reactant is filtered, remove the sodium-chlor that generates in the dereaction, unreacted acrylate chloride and solvent are removed in underpressure distillation again, make colourless viscous liquid, are the linking agent diacrylate macrogol ester of different molecular weight.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01136626 CN1129628C (en) | 2001-10-23 | 2001-10-23 | Crosslinking agent and prepn of high-hydroscopicity resin thereof |
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| CN 01136626 CN1129628C (en) | 2001-10-23 | 2001-10-23 | Crosslinking agent and prepn of high-hydroscopicity resin thereof |
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| CN 03148511 Division CN1258545C (en) | 2001-10-23 | 2001-10-23 | High water absorbency resin and its preparation method |
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| CN1344756A CN1344756A (en) | 2002-04-17 |
| CN1129628C true CN1129628C (en) | 2003-12-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5006507B2 (en) | 2004-01-30 | 2012-08-22 | 株式会社日本触媒 | Acrylic acid production method |
| TWI353360B (en) | 2005-04-07 | 2011-12-01 | Nippon Catalytic Chem Ind | Production process of polyacrylic acid (salt) wate |
| TWI394789B (en) | 2005-12-22 | 2013-05-01 | Nippon Catalytic Chem Ind | Water-absorbent resin composition, method of manufacturing the same, and absorbent article |
| EP1837348B9 (en) | 2006-03-24 | 2020-01-08 | Nippon Shokubai Co.,Ltd. | Water-absorbing resin and method for manufacturing the same |
| DE602007003397D1 (en) | 2006-03-29 | 2010-01-07 | Nippon Catalytic Chem Ind | Process for the preparation of water-absorbent polyacrylic acid (salt) resin |
| CN100365029C (en) * | 2006-07-19 | 2008-01-30 | 浙江大学 | Antisticking agent in preparation of reversed phase suspension polymerization polypropylene high water absorption resin |
| CN105771945A (en) | 2009-09-29 | 2016-07-20 | 株式会社日本触媒 | Particulate water absorbent and process for production thereof |
| CN102634047B (en) * | 2012-05-16 | 2013-05-08 | 苏州宜生生物技术有限公司 | Preparation method of macromolecule hydro-gel |
| CN103554481A (en) * | 2013-10-28 | 2014-02-05 | 西南石油大学 | Long-chain-segment crosslinking agent and preparation method thereof |
| CN103665370A (en) * | 2013-11-12 | 2014-03-26 | 向华 | Preparation method and application of poly(ethylene glycol) diacrylate (PEGDA) |
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