CN1046738C - Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent - Google Patents
Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent Download PDFInfo
- Publication number
- CN1046738C CN1046738C CN96114141A CN96114141A CN1046738C CN 1046738 C CN1046738 C CN 1046738C CN 96114141 A CN96114141 A CN 96114141A CN 96114141 A CN96114141 A CN 96114141A CN 1046738 C CN1046738 C CN 1046738C
- Authority
- CN
- China
- Prior art keywords
- starch
- preparation
- materials
- vinylformic acid
- graft copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Graft Or Block Polymers (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The present invention provides a preparation method of starch graft copolymerization acrylic acid (acrylate) super strength water absorbents. In the method, when alkali is used for partially neutralizing acrylic acid and/or methacrylic acid, cross linking agents and initiating agents are added; solid content is 35 to 40%; the temperature of materials is kept at 25 to 35DEG C for more than 10 min; starch is added; the materials and the starch are fed in a roller drier after being uniformly stirred for carrying out graft copolymerization reaction and are simultaneously dried for obtaining products. The preparation method has the characteristics of simple technology, easily controlled technological condition, low product cost, high water absorption rate and high water absorbing speed. Products prepared by the technology have purified water absorption rate reaching 600 times, physiological saline absorption rate reaching 65 times and the absorption rate of purified water and physiological saline in 1 min respectively reaching 410 times and 50 times, and can be widely applied to the fields of sanitation materials, forestry, horticulture, building materials, chemical industry, anti-sweat materials, etc.
Description
The present invention relates to a kind of preparation method of water-retaining agent, the preparation method of specifically a kind of starch graft copolymer vinylformic acid and salt water-retaining agent thereof.
Super strength water absorbent is the novel high polymer functional materials that grows up over into year, is also referred to as hydroscopic high-molecular resin.Its notable feature is the pure water that can absorb own wt hundred times and even several thousand times.Middle nineteen sixties, the USDA north G.F.Fanta of institute is fine with wheat starch and propylene to be raw material, by the initiation of cerium salt the fine graft copolymerization of propylene is done a large amount of scientific researches to starch, and obtained important achievement (Chemical Week, 1974).Their the product code name of research is P-PAN, and water-intake rate is 300～1000 times, and suction back swelling is a gel, also is difficult for water is extruded under pressure, has good water retention property.The research and the application of domestic super strength water absorbent start from the eighties.The manufacture method of Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences is to be initiator with the persulphate, and resaponifying preparing product after the fine graft polymerization of starch and propylene, product water-intake rate are 400～490 times.This technology has been applied for Chinese patent (CN1058972A) August nineteen ninety.Super strength water absorbent is a kind of product innovation to the domestic market, though domestic have many units to research and develop out product and set up production equipment, homemade super strength water absorbent product does not move towards market as yet.Its reason has following several respects: (1) complex process, processing condition are not easy to control; (2) product cost is higher; (3) the product water-intake rate is lower, and absorption speed is slower.Thereby product can't be participated in market competition.
The object of the present invention is to provide the preparation method of a kind of starch graft copolymer vinylformic acid and salt water-retaining agent thereof, this preparation method has that technology is simple, processing condition are easy to control, product cost is low, water-intake rate is higher, absorption speed characteristics faster.
The objective of the invention is to realize by following scheme.
The preparation method of a kind of starch graft copolymer vinylformic acid and salt water-retaining agent thereof: with in the alkali and behind vinylformic acid and/or the methacrylic acid, degree of neutralization is 80～95mol%, add the linking agent of monomer 0.01～1Wt% and the initiator of dry material 0.4～1.5Wt%, solid content is 35～40%, material is more than 25～35 ℃ of insulation 10min, add starch, starch and vinylformic acid and/or methacrylic acid mol ratio (AA/St/mol) are 1: 5～15, back feed roller drying machine stirs, carry out graft copolymerization under 110～150 ℃ of temperature, drying obtains product simultaneously.
The preparation method of a kind of starch graft copolymer vinylformic acid provided by the invention and salt super strength water absorbent thereof has: (1) technology is simple, and processing condition are easy to control; (2) product cost is lower; (3) the product water-intake rate is higher, and absorption speed is characteristics faster.The specific absorption of the product pure water of this prepared can reach 600 times; The specific absorption of physiological saline can reach 65 times; The specific absorption of 1min pure water and the specific absorption of physiological saline are respectively 410 times and 50 times.Product can be widely used in fields such as sanitary material, agricultural, gardening, building materials, chemical industry and anti-condensation material.
The water-intake rate measuring method:
1, pure water water-intake rate (DWA) measuring method
Sample is pulverized the back by 10 mesh standard sieves, takes by weighing sample 0.200g, and (pH is 7.0 in the adding 500g deionized water; Temperature is 25 ℃), stir with 120～150 commentaries on classics/min speed, pour 100 order sample sifters behind about 1～10min into, filter about 15min to anhydrous leaching, the water yield that weighing leaches calculates pure water water-intake rate (DWA) with following formula:
2, physiological saline water-intake rate (SWA) measuring method
Sample is pulverized the back by 10 mesh standard sieves, takes by weighing sample 1.00g, adds 2.00g physiological saline (0.9% sodium chloride aqueous solution; PH is 7.0; Temperature is 25 ℃), stir with 120～150 commentaries on classics/min speed, pour 100 order sample sifters behind about 1～10min into, filter about 15min to anhydrous leaching, the water yield that weighing leaches calculates pure water water-intake rate (SWA) with following formula:
The present invention is described in detail below in conjunction with embodiment.
Embodiment 1:
The preparation method of a kind of starch graft copolymer vinylformic acid and salt water-retaining agent thereof: with in the potassium hydroxide and behind vinylformic acid and/or the methacrylic acid, degree of neutralization is 80～95mol%, the linking agent N that adds monomer 0.01～1Wt%, the initiator ammonium persulfate of N-methylene-bisacrylamide and dry material 0.4～1.5Wt%, solid content is 35～40%, material is more than 25～35 ℃ of insulation 10min, add starch, starch and vinylformic acid mol ratio (from/St/mol) be 1: 5～15, back feed roller drying machine stirs, carry out graft copolymerization under 110～150 ℃ of temperature, drying obtains product simultaneously.Product is through pulverizing the product that obtains certain fineness.The specific absorption of product pure water can reach 600 times; The specific absorption of physiological saline can reach 65 times; The specific absorption of 1min pure water and the specific absorption of physiological saline are respectively 410 times and 50 times.
Embodiment 2:
Different with embodiment 1 be that initiator is a Potassium Persulphate with in the sodium hydroxide and vinylformic acid and/or methacrylic acid, material feeds nitrogen and protects when 25～35 ℃ of insulations.
Claims (3)
1, the preparation method of a kind of starch graft copolymer vinylformic acid and salt water-retaining agent thereof, it is characterized in that with in the alkali and behind vinylformic acid and/or the methacrylic acid, degree of neutralization is 80～95mol%, the N that adds monomer 0.01～1Wt%, the ammonium persulphate of N--methylene-bisacrylamide linking agent and dry material 0.4～1.5Wt% or Potassium Persulphate initiator, solid content is 35～40%, material is more than 25～35 ℃ of insulation 10min, add starch, starch and vinylformic acid and/or methacrylic acid mol ratio are 1: 5～15, the feed roller drying machine carries out graft copolymerization after stirring under 110～150 ℃ of temperature, and drying obtains product simultaneously.
2, the preparation method of starch graft copolymer vinylformic acid as claimed in claim 1 and salt water-retaining agent thereof is characterized in that material feeds nitrogen and protects when 25～35 ℃ of insulations.
3, the preparation method of starch graft copolymer vinylformic acid as claimed in claim 1 or 2 and salt water-retaining agent thereof is characterized in that alkali can adopt sodium hydroxide or potassium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114141A CN1046738C (en) | 1996-12-26 | 1996-12-26 | Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114141A CN1046738C (en) | 1996-12-26 | 1996-12-26 | Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1157295A CN1157295A (en) | 1997-08-20 |
| CN1046738C true CN1046738C (en) | 1999-11-24 |
Family
ID=5121957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96114141A Expired - Fee Related CN1046738C (en) | 1996-12-26 | 1996-12-26 | Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046738C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087020C (en) * | 1998-12-29 | 2002-07-03 | 陈云进 | Simple preparation process of high-hydroscopicity resin |
| CN101302271B (en) * | 2007-05-11 | 2011-11-30 | 内蒙古大学 | Preparation of potassium-containing super absorbent resin |
| CN103229644B (en) * | 2013-04-09 | 2015-08-26 | 北京林业大学 | The bilayer of rock slope revegetation soil moved in improve the original matrix and water-loss reducer is sowed grass seeds by duster method |
| CN103923261B (en) * | 2014-04-02 | 2019-03-05 | 合肥杰事杰新材料股份有限公司 | A kind of preparation method of composite high-performance water-absorbing resins |
| CN104099054B (en) * | 2014-06-30 | 2015-09-30 | 安徽神舟飞船胶业有限公司 | Acrylic acid-polyurethane modification by copolymerization starch adhesive formula and preparation technology thereof |
| CN110679406A (en) * | 2019-01-25 | 2020-01-14 | 山东省农业科学院农业资源与环境研究所 | A water-saving cultivation method for improving the yield and quality of strawberry in facility |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058972A (en) * | 1990-08-11 | 1992-02-26 | 中国科学院成都有机化学研究所 | A kind of manufacture method of High hydrophilous resin |
-
1996
- 1996-12-26 CN CN96114141A patent/CN1046738C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058972A (en) * | 1990-08-11 | 1992-02-26 | 中国科学院成都有机化学研究所 | A kind of manufacture method of High hydrophilous resin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1157295A (en) | 1997-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zain et al. | Superabsorbent hydrogel based on sulfonated-starch for improving water and saline absorbency | |
| Hua et al. | Synthesis, characterization and swelling behaviors of sodium alginate-g-poly (acrylic acid)/sodium humate superabsorbent | |
| CN101638456B (en) | A method for preparing superabsorbent resin with cross-linked structure using potato starch as raw material | |
| Lagos et al. | Grafting onto chitosan. I. Graft copolymerization of methyl methacrylate onto chitosan with Fenton's reagent (Fe2+− H2O2) as a redox initiator | |
| CN107540789B (en) | Synthetic method of bioactive derivative bagasse xylan syringate-g-AM | |
| Raju et al. | Synthesis and swelling properties of superabsorbent copolymers | |
| Jiang et al. | Designing and application of reactive extrusion with twice initiations for graft copolymerization of acrylamide on starch | |
| Khullar et al. | Grafting of acrylonitrile onto cellulosic material derived from bamboo (Dendrocalamus strictus) | |
| CN1165152A (en) | Polyacrylate type high water absorption resin | |
| CN1046738C (en) | Method for preparation of starch graft copolymer acrylic acid (acrylate) super water-absorbing agent | |
| CN1408741A (en) | Method for preparing anti-drought water-retaining agent | |
| CN109851726A (en) | A kind of biodegradable graft copolymerized polymer composite material and preparation method | |
| CN100398573C (en) | Method for preparing high absorptive resin in acrylic acid type | |
| CN101275004A (en) | A kind of preparation method of water retaining agent with biochemical nutrition function | |
| CN1231510C (en) | Organic-inorganic composite water-retaining agent and its preparing method | |
| CN105837755A (en) | Preparation method for agricultural water-retaining agent based on vermiculite and sodium alginate | |
| Thimma et al. | Synthesis and characterization of guar gum‐graft‐polyacrylonitrile | |
| CN1319618A (en) | Holoside water retaining agent and preparation method thereof | |
| CN1912006A (en) | Humic acid base superstrength water retaining agent and its preparation method | |
| Hua et al. | Preparation and properties of superabsorbent containing starch and sodium humate | |
| US11958925B2 (en) | Process for preparation of superabsorbent polymer | |
| CN1239535C (en) | Method for making water-absorbent acrylate resin | |
| CN109824831A (en) | A kind of preparation method of degradable high-performance water-absorbing resin | |
| CN1560131A (en) | Manufacturing method of sodium polyacrylate/kaolin superabsorbent composite material | |
| CN101654521A (en) | Method for preparing copolymeric hydrogel containing maleylation chitosan structure by electron beam irradiation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |