CN1179991C - Method for preparing high water absorbability resin by irradiation method - Google Patents
Method for preparing high water absorbability resin by irradiation method Download PDFInfo
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- CN1179991C CN1179991C CNB021147825A CN02114782A CN1179991C CN 1179991 C CN1179991 C CN 1179991C CN B021147825 A CNB021147825 A CN B021147825A CN 02114782 A CN02114782 A CN 02114782A CN 1179991 C CN1179991 C CN 1179991C
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- acrylate
- acrylamide
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Abstract
The present invention relates to a method for preparing high water absorbability resin by an irradiation method, which is characterized in that acrylic acid, acrylamide, hydroxypropyl acrylate, 2-acrylamide-2-methyl propanesulfonic acid and a crosslinking agent are irradiated by cobalt-60 gamma rays at the temperature of 25 to 35 DEG C, wherein the irradiation dose rate of the cobalt-60 gamma rays is from 0.5 to 5KG y/h; total doses reach 10 to 15KG y, which obtains water absorption resin. The water absorption resin prepared by the method has the advantages of quick water absorption speed, high water absorption rate and no poison, and is suitable for producing sanitary towels and paper diapers.
Description
Technical field
The present invention relates to a kind of process for preparing resins, particularly a kind of preparation method of super absorbent resin.
Background technology
At present, the preparation method of the super absorbent resin (Super Absorbent Polymer) that uses in sanitary towel and the paper nappy mainly contains inverse suspension polymerization method, water solution polymerization process and ionization radiation method.
Relevant employing ionization radiation method prepares absorbent resin all report both at home and abroad, Zhang Zhi becomes to have introduced radiation method and causes starch-acrylonitrile graft copolymer with preparation super absorbent resin (polymer material science and engineering, 1992, (6): 16-21), shortcoming is that synthetic water-absorbing resin suction salt water speed is unhappy, also residual deleterious acrylonitrile monemer in its system can not be used to produce sanitary towel and paper nappy.
The patent No. 85102156.5 has been introduced the water-absorbing resin polyacrylamide for preparing Water in Water Shutoff in Oil Field agent or water conditioner with radiation method, the residual acrylamide of this water-absorbing resin is poisonous, it is unhappy to inhale the salt water speed, and suction back gel feel is hardened, and can not be used for sanitary towel and paper nappy.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose the method that a kind of radiation method prepares water-absorbing resin, fast with the water-absorbing resin absorption speed of this inventive method preparation, water-intake rate is high, nontoxic, be applicable to and produce sanitary towel and paper nappy.
Purpose of the present invention is realized by following measure: each component and weight percent are:
Vinylformic acid 60～80
Acrylamide 10～20
Propylene glycol monoacrylate 5～10
2-acrylamide-2-methyl propane sulfonic acid 2～7
Polyol crosslink agent 2.5～3.0
Bi-vinyl reactive monomer linking agent 0.01;
The steps include: 1. under 25～35 ℃, vinylformic acid is neutralized to pH6～7 with NaOH solution, add acrylamide, Propylene glycol monoacrylate, 2-acrylamide-2-methyl propane sulfonic acid, be stirred well to dissolving fully, add polyol crosslink agent, bi-vinyl reactive monomer linking agent, be stirred well to dissolving, mixed solution is injected stainless steel irradiation reaction device; 2. the above-mentioned stainless steel irradiation reaction device that fills mixed solution is placed in the radiation chamber, mixeding liquid temperature is under 25～35 ℃, with radiation dose rate is the cobalt-60 irradiation of 0.5～5KGy/h, makes total dose reach 10～15KGy, promptly gets the water-absorbing resin that is transparent blob of viscose.The water-absorbing resin that is transparent blob of viscose is got 40～100 purpose products through chopping, granulation, drying, pulverizing, screening.
Above-mentioned polyol crosslink agent is propylene glycol, ethylene glycol, glycol ether, triglycol, glycerol, Tetraglycol 99,2,2,4-trimethylammonium-1,3-pentanediol, pentanediol, tetramethylolmethane, Sorbitol Powder, diethanolamine, trolamine, polyoxyethylene glycol, polyglycerol or polypropylene glycol.
Above-mentioned bi-vinyl reactive monomer linking agent is two (methyl) acrylate, two (methyl) acrylate of glycol ether, the N of diethyl (third) glycol, N '-methylene diacrylamide, two (methyl) acrylate of polyoxyethylene glycol, two (methyl) acrylate of neopentyl glycol, trimethylolpropane tris (methyl) acrylate or 1, two (methyl) acrylate of 6-hexylene glycol.
Embodiment 1
With in the stainless steel of vinylformic acid 30Kg adding strap clamp cover and agitator and in the still, send into 5～15 ℃ cold water cooling in the chuck, under agitation, NaOH solution neutralization with 23% (weight percent), controlled temperature is at 25～35 ℃, be neutralized to pH7, add acrylamide 7.5Kg, Propylene glycol monoacrylate 4.12Kg, 2-acrylamide-2-methyl propane sulfonic acid 3.0Kg, be stirred well to dissolving fully, add glycol ether 1.38Kg, dipropylene glycol diacrylate 4.6g, after stirring, continuation is cooled to 25～35 ℃ with cold water, and injecting volume then respectively is four irradiation reaction devices of 30L, and the irradiation reaction device is of a size of 25 * 12 * 70cm (length * wide * height), place the irradiation field irradiation of cobalt-60 gamma emitter, the radiation dose rate of this radiation position is 0.5～5KGy/h, when the irradiation total dose reaches 12KGy, forms the blocky water-absorbing resin 90Kg of clear, colorless glue.Transparent blob of viscose monoblock is inserted knife mill be cut into the square fragment of 5cm, drop into tablets press then and obtain micelle about about Φ 2mm.Again micelle is dropped into vibrating fluid bed dryer, in 100 ℃ of hot blasts, be dried to moisture≤7%.Dried water-absorbing resin micelle is pulverized in pulverizer, through the sieve apparatus screening, gets 40～100 orders, the about 42Kg of weight.
Embodiment 2
With embodiment 1.Vinylformic acid 27.2Kg, NaOH solution is neutralized to pH6.5, acrylamide 6.0Kg, Propylene glycol monoacrylate 2.5Kg, 2-acrylamide-2-methyl propane sulfonic acid 1.2Kg, ethylene glycol 1.03Kg, polyoxyethylene glycol double methacrylate 3.8g is irradiated to dosage and reaches 15KGy, forms the blocky water-absorbing resin 85Kg of clear, colorless glue, after treatment, get the about 40Kg of 40～100 purpose water-absorbing resins.
Embodiment 3
With embodiment 1.Vinylformic acid 300Kg, NaOH solution is neutralized to pH7.0, acrylamide 40Kg, Propylene glycol monoacrylate 20Kg, 2-acrylamide-2-methyl propane sulfonic acid 10Kg, ethylene glycol 11.34Kg, Diethylene Glycol double methacrylate 38g injects 40 irradiation reaction devices with mixed solution, be irradiated to dosage and reach 12KGy, form the blocky water-absorbing resin 860Kg of clear, colorless glue, after treatment, get the about 420Kg of 40～100 purpose water-absorbing resins.
Embodiment 4
With embodiment 1.Vinylformic acid 272Kg, NaOH solution is neutralized to pH6.5, acrylamide 60Kg, Propylene glycol monoacrylate 25Kg, 2-acrylamide-2-methyl propane sulfonic acid 12Kg, polyoxyethylene glycol 10.31Kg, two (methyl) acrylate 38g of neopentyl glycol inject 40 irradiation reaction devices with mixed solution, be irradiated to dosage and reach 15KGy, form the blocky water-absorbing resin 840Kg of clear, colorless glue, after treatment, get the about 400Kg of 40～100 purpose water-absorbing resins.
The water-absorbing resin absorption speed of the inventive method preparation is fast, water-intake rate is high and nontoxic, is applicable to and produces sanitary towel and paper nappy.Water absorbing properties sees the following form:
| Embodiment | Absorption speed g/S.g (physiological saline) | Suction multiple g/g (distilled water) | Water-retentivity % (pressurization 3.5kg) | pH |
| 1 | 32 | 500 | 86 | 7.8 |
| 2 | 28 | 450 | 84 | 8.0 |
| 3 | 29 | 480 | 85 | 8.0 |
| 4 | 27 | 460 | 83 | 8.0 |
Claims (4)
1. the method for a preparing high water absorbability resin by irradiation method, feature is that each component and weight percent are:
Vinylformic acid 60～80
Acrylamide 10～20
Propylene glycol monoacrylate 5～10
2-acrylamide-2-methyl propane sulfonic acid 2～7
Polyol crosslink agent 2.5～3.0
The reactive monomer linking agent 0.01 of bi-vinyl;
Step is: 1. under 25～35 ℃, with NaOH solution vinylformic acid is neutralized to pH6～7, add acrylamide, Propylene glycol monoacrylate, 2-acrylamide-2-methyl propane sulfonic acid, be stirred well to dissolving fully, add the polyol crosslink agent, the reactive monomer linking agent of bi-vinyl, be stirred well to dissolving, mixed solution is injected irradiation reaction device 2. to be placed the above-mentioned irradiation reaction device that fills mixed solution in the radiation chamber, mixeding liquid temperature is under 25～35 ℃, with radiation dose rate is the cobalt-60 irradiation of 0.5～5KGy/h, make total dose reach 10～15KGy, promptly get the water-absorbing resin that is transparent blob of viscose.
2. the method for preparing super absorbent resin according to claim 1, feature is that above-mentioned polyol crosslink agent is propylene glycol, ethylene glycol, glycol ether, triglycol, glycerol, Tetraglycol 99,2,2,4-trimethylammonium-1,3-pentanediol, pentanediol, tetramethylolmethane, Sorbitol Powder, diethanolamine, trolamine, polyoxyethylene glycol, polyglycerol or polypropylene glycol.
3. the method for preparing super absorbent resin according to claim 1, feature is that above-mentioned bi-vinyl reactive monomer linking agent is two (methyl) acrylate, two (methyl) acrylate of glycol ether, the N of diethyl (third) glycol, N '-methylene diacrylamide, two (methyl) acrylate of polyoxyethylene glycol, two (methyl) acrylate of neopentyl glycol, trimethylolpropane tris (methyl) acrylate or 1, two (methyl) acrylate of 6-hexylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021147825A CN1179991C (en) | 2002-01-24 | 2002-01-24 | Method for preparing high water absorbability resin by irradiation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021147825A CN1179991C (en) | 2002-01-24 | 2002-01-24 | Method for preparing high water absorbability resin by irradiation method |
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| CN1434062A CN1434062A (en) | 2003-08-06 |
| CN1179991C true CN1179991C (en) | 2004-12-15 |
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| CNB021147825A Expired - Fee Related CN1179991C (en) | 2002-01-24 | 2002-01-24 | Method for preparing high water absorbability resin by irradiation method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168580B (en) * | 2006-10-27 | 2012-09-26 | 台湾塑胶工业股份有限公司 | Method for producing high water absorption resin |
| CN101921359B (en) * | 2010-09-29 | 2012-04-18 | 湖南省原子能农业应用研究所 | Polyacrylic acid or copolymer thereof and preparation method of polyacrylate or copolymer salt thereof |
| CN103102443B (en) * | 2012-12-28 | 2015-12-23 | 南通科益化工有限公司 | A kind of synthesis of physiological hygiene hydroscopic high-molecular resin |
| CN104327219B (en) * | 2014-08-27 | 2017-02-22 | 武汉持欣科技有限公司 | Aqueous emulsion for basic binder of adhesive for hard-bonding materials and preparation method thereof |
| CN105273128A (en) * | 2015-10-22 | 2016-01-27 | 东北电力大学 | Preparation method of AM/AMPS/BA (acrylamide/2-acrylamido-2-methylpropane sulfonic acid/butyl acetate) copolymer and MAH-beta-CD (maleic anhydride-beta-cyclodextrin) composition |
| CN109810215B (en) * | 2018-12-28 | 2019-11-08 | 珠海得米新材料有限公司 | A kind of preparation method of double cross connection super absorbent resin |
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