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Crystal mud and its prepn and use

A technology of crystal mud and water solution, which is applied in botany equipment and methods, applications, soilless cultivation, etc., can solve the problems of low gel strength, heating above 60-100°C, heating above 50-90°C, etc. Achieve high gel strength and water retention, safe production operation, and large production capacity

Inactive Publication Date: 2006-05-17
ZHONGKAI UNIV OF AGRI & ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, superabsorbent resins generally have disadvantages such as low gel strength and single color, which limit the application of superabsorbent resins in the fields of flower soilless cultivation, flower arrangement, and ornamental gardening.
Moreover, according to the current production technology, the polymerization reaction time of the superabsorbent resin is very long or the reaction material needs to be heated to a relatively high temperature
Propose a kind of crystal soil for cultivating flowers as Chinese invention patent application 92108081.6, but the color is a single colorless and transparent product, and the reaction material needs to be heated to more than 50~90°C; The reaction time is as long as 4 hours; while in CN1375509A, the reaction materials need to be heated above 60-100°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve 50 kg of acrylic acid in 30 kg of water, neutralize with 72 kg of 29% sodium hydroxide, take 970 mL of neutralizing liquid after cooling, stir to dissolve 620 g of acrylamide and 1.4 g of N,N'-methylenebisacrylamide Finally, add 560 ml of water and stir well. Add 6 milliliters of 8.2% ammonium persulfate and 5 milliliters of 9.7% sodium sulfite, stir evenly, pour into the reaction tray for polymerization, and the thickness of the reaction mixture in the reaction tray is 0.5 cm. After the polymerization reaction is finished, it is cut into pellets and packaged. After the product absorbs distilled water and reaches saturation, it becomes a colorless and transparent gel with a water content of 98.2%.

Embodiment 2

[0017] Others are the same as in Example 1, take 940mL of cooled neutralization solution, stir to dissolve 600g of acrylamide and 1.25g of N,N'-methylene bisacrylamide, add 600ml of water, and stir evenly. Add 0.5 g of ammonium persulfate, stir evenly; then add 0.55 g of sodium sulfite, stir evenly, pour into a reaction pan for polymerization, and the thickness of the reaction mixture in the reaction pan is 1.1 cm. After the polymerization reaction is finished, the gel after the reaction is broken with a gel breaker, dried, and pulverized. After the product absorbs distilled water and reaches saturation, it becomes a colorless and transparent gel with a water content of 98.7%.

Embodiment 3

[0019] Dissolve 53 kg of acrylic acid in 31 kg of water, neutralize with 62 kg of 33% sodium hydroxide, take 1000 mL of neutralizing solution after cooling, stir to dissolve 590 g of acrylamide and 1.8 g of N,N'-methylenebisacrylamide Finally, add 610 ml of water and stir well. Add 3 grams of molybdenum chrome red pigment as component B, stir and mix evenly, then add 8 ml of 10.5% potassium persulfate and 6 ml of 8.4% sodium sulfite respectively, stir evenly, and pour into the reaction pan for polymerization. After the polymerization reaction is finished, the gel is crushed, dried, and packaged. After the product absorbs distilled water and reaches saturation, it becomes a red translucent gel with a water content of 98.3%.

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PUM

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Abstract

The crystal mud is gel matter prepared with sodium hydroxide partially neutralized acrylic acid, acrylamide, cross-linking agent N, Ní»-methylene diacrylamide dissolved in water and through adding oxidant and reductant to react at low temperature or normal temperature. It is colorless and transparent, color transparent or color semi-transparen, and has water absorbing capacity as high as 24-200 times self weight. It is suitable for use in planting flower, soilless culture of flower, garden product, etc owing to its relatively high decoration value. It is prepared with reaction monomer or reaction monomer and coloring agent as well as sodium hydroxide as neutralizing agent and through disc polymerization in short reaction time.

Description

Technical field: [0001] The invention belongs to the technical field of superabsorbent resin and its preparation method, and in particular relates to a colorless or colored crystal mud and its preparation method and application. Background technique: [0002] At present, superabsorbent resins generally have disadvantages such as low gel strength and single color, which limit the application of superabsorbent resins in the fields of soilless flower cultivation, flower arrangement, and ornamental gardening. Moreover, according to the current production technology, the polymerization reaction time of the superabsorbent resin is very long or the reaction material needs to be heated to a relatively high temperature. Propose a kind of crystal soil for cultivating flowers as Chinese invention patent application 92108081.6, but the color is a single colorless and transparent product, and the reaction material needs to be heated to more than 50~90°C; The reaction time is as long as ...

Claims

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Application Information

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IPC IPC(8): C08F220/04A01G31/00C08F2/44C08F4/40C08L33/26
CPCY02P60/21
Inventor 崔英德姚育忠廖列文尹国强贾振宇黎新明邓志城吴洁鹏康正
Owner ZHONGKAI UNIV OF AGRI & ENG
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