CN1144224A - High power water-absorbing resin and preparation method thereof - Google Patents
High power water-absorbing resin and preparation method thereof Download PDFInfo
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- CN1144224A CN1144224A CN 95108869 CN95108869A CN1144224A CN 1144224 A CN1144224 A CN 1144224A CN 95108869 CN95108869 CN 95108869 CN 95108869 A CN95108869 A CN 95108869A CN 1144224 A CN1144224 A CN 1144224A
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Abstract
Tjhe high-power water-absorbing resin is made up by using waste material of Nitrilon factory-polyacrylonitrile slabs as main raw material, and making it pass through such processes of hydrolyzing with alkali, adding crosslinking agent and carrier to make polymerization, drying, pulverizing and seal-packing so as to obtain the invented product. Its water-absorbing rate can be up to 500-1000 times, and its water-retaining behavious is excellent. Said invented product can be extensively used in the fields of agriculture, animal husbandry, medicine, sanitation, building, chemical engineering and paper-making, etc..
Description
The present invention relates to field of polymer technology, particularly a kind of high power water-absorbing resin.
At present, the High hydrophilous resin of domestic use is most of by external import, and price is mostly at 3.6～40,000 yuan/ton, the producer of this product of domestic production seldom mostly adopts starch-grafted or the vinylformic acid synthesis method is produced complex process, the cost height, profit is low, and minimum selling price is also more than 2.8 ten thousand yuan/ton.
The purpose of this invention is to provide high power water-absorbing resin that a kind of technology is simple, cost is low and preparation method thereof.
The structure of resin of the present invention is determined by following preparation method:
With acrylic fibers alkaline solution hydrolysis, transferring PH is 6～8, adds the linking agent polymerization, adds carrier and reinforces, and with carrying out drying after the ethanol dehydration, packs promptly after the pulverizing.
Particularly preferred preparation method of the present invention is:
With polyacrylonitrile aqueous sodium hydroxide solution hydrolysis, transferring PH with hydrochloric acid is 6～8, adds linking agent formaldehyde, under agitation carry out polymerization, and then add carrier aluminium hydroxide, it is complete further to reinforce polymerization, with carrying out vacuum-drying after the ethanol dehydration, pack after the pulverizing.
In a preferred embodiment of the present invention, described hydrolysis temperature is 102～108 ℃, 4～8 hours time; Temperature drops to and transfers pH value below 50 ℃ again after the hydrolysis; Describedly be aggregated in 45～50 ℃ and carry out more than 1 hour, heat up 80～100 ℃, adding aluminum hydroxide, insulated and stirred made polymerization complete more than 1 hour; When treating that temperature drops to below 40 ℃ with 95% above ethanol sedimentation, then in vacuum-drying below 80 ℃ to water content 3% (weight).
The preferred weight percent of raw material described in the inventive method is as follows:
Acrylic fibers 8～12%, sheet alkali (NaoH) 4～8%,
Water 69～80%, linking agent 0.15～0.35%,
Carrier 1.5～3%, 15～19% hydrochloric acid 5～8%.
The molecular resin amount that makes with the inventive method is more than 80000; Granularity is generally 60～100 orders; Mass dryness fraction: hard when dry, meet air moisture absorption deliquescing, water absorbing properties is constant; Bulk density 0.85～0.929/cm
3Water-intake rate: inhaling deionized water is 500～1000 times; Outward appearance: white or little yellow.
A particularly advantageous advantage of present method is to utilize the waste material of Acrylic Fibers Plant to make raw material, and available polyacrylonitrile blob of viscose or waste silk are produced high power water-absorbing resin.Present method technology is simple, cost is low, profit is high, and facility investment is few, and factory easily produces in batches, turns waste into wealth simultaneously.
High power water-absorbing resin of the present invention can be absorbed as the water of hundreds of times to thousands of times of own wts at short notice, and also has excellent water retention property, and the gel that generates after the water-swelling had both made the water that is squeezed also can not emanate away not as paper and cotton.This resin can be widely used in every field such as agriculture and animal husbandry, medical science, health, building, chemical industry, papermaking, petroleum drilling, scattered seeds by airplane for afforestation, scientific research.
Further specify the present invention below by embodiment.
Embodiment:
Prescription: water 76.25%, sodium hydroxide 6%,
The hydrochloric acid 5% of polyacrylonitrile 10.5%, 15～19%,
Formaldehyde 0.25%, aluminium hydroxide 2%,
Sodium hydroxide is added the polyacrylonitrile blob of viscose after soluble in water, 102～108 ℃ of hydrolysis 4～8 hours, need open water of condensation during hydrolysis, but the later stage agitation as appropriate makes hydrolysis complete; Temperature drops to and transfers PH with 15～19% hydrochloric acid below 50 ℃ is 7, ceaselessly stirs simultaneously; Under stirring state, slowly add formaldehyde, 45 ℃ of insulation polymerizations 1 hour; Be warming up to 80 ℃, under agitation be incubated 1 hour, it is complete to make it further polymerization; With 60～80 mesh filter screens material filtering is arrived the precipitation steel basin; Treat that temperature drops to below 40 ℃, with 95% following ethanol sedimentation of no methyl alcohol; To precipitate material and be dried to water content in the vacuum drier below 3%, temperature is controlled at below 80 ℃, need reclaim ethanol when dry; Dried material should be pulverized levigate dress sealing bag and pail pack rapidly, and every barrel of 25Kg reduces the storage period in air as far as possible.The resin water-intake rate that makes is more than 700 times, and the factory cost valency is about 1.5 ten thousand yuan/ton, and 2.6 ten thousand yuan/ton of prices are produced 200 tons midget plant per year, after putting into serial production, is recoverable to fully invested in 1 year.
Such scheme only provides as an example, is not limited to the present invention, and also available other method of resin of the present invention prepares, but does not all break away from the protection domain of essence of the present invention and claim.
Claims (6)
1, a kind of high power water-absorbing resin is characterized in that making by following step: with acrylic fibers alkaline solution hydrolysis, transferring PH is 6～8, adds the linking agent polymerization, adds carrier and reinforces, and with carrying out drying after the ethanol dehydration, packs after the pulverizing.
2, resin as claimed in claim 1 is characterized in that polyacrylonitrile aqueous sodium hydroxide solution hydrolysis, and transferring PH with hydrochloric acid is 6～8, add formaldehyde, under agitation carry out polymerization, add aluminium hydroxide then, further reinforce polymerization,, pack after the pulverizing with carrying out vacuum-drying after the ethanol dehydration.
3, resin as claimed in claim 1 is characterized in that described hydrolysis temperature is 102～108 ℃, and 4～8 hours time, temperature drops to and transfers pH value below 50 ℃ again after the hydrolysis.
4, resin as claimed in claim 1, it is characterized in that describedly being aggregated in 45～50 ℃ and carrying out more than 1 hour, heat up 80～100 ℃, adding aluminum hydroxide, insulated and stirred is more than 1 hour, when treating that temperature drops to below 40 ℃ with 95% above ethanol sedimentation, then in vacuum-drying below 80 ℃ to water content below 3%.
5, resin as claimed in claim 1 is characterized in that weight proportion is:
Acrylic fibers 8～12%, sheet alkali 4～8%
Water 69～80% linking agents 0.15～0.35%
The hydrochloric acid 5～8% of carrier 1.5～3% 15～19%.
6, a kind of preparation method of high power water-absorbing resin is characterized in that being undertaken by step described in the claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108869 CN1144224A (en) | 1995-08-31 | 1995-08-31 | High power water-absorbing resin and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108869 CN1144224A (en) | 1995-08-31 | 1995-08-31 | High power water-absorbing resin and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1144224A true CN1144224A (en) | 1997-03-05 |
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ID=5076956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95108869 Pending CN1144224A (en) | 1995-08-31 | 1995-08-31 | High power water-absorbing resin and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1144224A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106012098A (en) * | 2016-06-28 | 2016-10-12 | 陈建峰 | Preparing method of high-water-absorption antibacterial acrylic fiber |
| CN111094441A (en) * | 2017-09-22 | 2020-05-01 | 三大雅株式会社 | Water-absorbent resin composition and method for producing same |
| CN111139045A (en) * | 2019-12-20 | 2020-05-12 | 煤炭科学技术研究院有限公司 | Gas pressure measurement drilling hole filling sealing material and using method thereof |
-
1995
- 1995-08-31 CN CN 95108869 patent/CN1144224A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106012098A (en) * | 2016-06-28 | 2016-10-12 | 陈建峰 | Preparing method of high-water-absorption antibacterial acrylic fiber |
| CN111094441A (en) * | 2017-09-22 | 2020-05-01 | 三大雅株式会社 | Water-absorbent resin composition and method for producing same |
| CN111139045A (en) * | 2019-12-20 | 2020-05-12 | 煤炭科学技术研究院有限公司 | Gas pressure measurement drilling hole filling sealing material and using method thereof |
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