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Preparation method of super-absorbent water-retaining resin

A water-retaining resin and high water-absorbing technology, which is applied in the field of resin, can solve the problems of limited water-absorbing and water-retaining effects, seedling death due to lack of water, and increased cost investment, so as to improve water-absorbing and water-retaining performance and reusability, and save watering maintenance costs and labor input , Improve the water absorption and water retention rate and the effect of using times

Active Publication Date: 2020-06-26
FUJIAN SPRING ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A large part of road greening is the planting of seedlings, which require sufficient and continuous water to ensure their growth, but most of the water is lost due to evaporation during watering, resulting in the death of seedlings due to lack of water
In order to prevent water loss and ensure the survival of seedlings, one needs to increase the frequency of watering, but this is time-consuming and labor-intensive, wastes water resources, and increases maintenance costs; The amount of water stored and the speed of water evaporation can be reduced, and it can ensure that the seedlings are continuously moistened while reducing the frequency of watering, and will not die due to lack of water
At present, the water absorption and water retention effect of commercially available resins is limited, the service life is short, and the effect of reducing the frequency of watering is not obvious. It is often necessary to replace it to ensure the effect, which increases the cost input.

Method used

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  • Preparation method of super-absorbent water-retaining resin
  • Preparation method of super-absorbent water-retaining resin
  • Preparation method of super-absorbent water-retaining resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of super absorbent and water-retaining resin includes the following specific steps:

[0021] (1) Mix 10 parts by mass of polyethylene glycol 2000, 0.5 parts of phosphorous acid, 0.01 parts of dibutyltin dilaurate, and 5 parts of hexamethylene diisocyanate, and heat up to 80°C for 100 minutes. ;

[0022] (2) Add 10 parts of 2-hydroxyethyl acrylate to the reaction system and continue to react for 0.5 min to obtain a phosphorous-containing polyurethane surfactant;

[0023] (3) Cool down the prepared phosphorous polyurethane surfactant to be lower than 38°C, and stir rapidly under the condition of 8000rpm for dispersion;

[0024] (4) In step (3), add a polymerization system obtained by mixing 90 parts of acrylic acid with a degree of neutralization of 95% and 70 parts of acrylamide, and stir uniformly under the condition of 8000 rpm;

[0025] (5) After stirring, the temperature is raised to 68° C., 0.5 part of potassium persulfate is added to react, and after co...

Embodiment 2

[0027] A preparation method of super absorbent and water-retaining resin includes the following specific steps:

[0028] (1) Mix 15 parts by mass of polyethylene glycol 2000, 1 part of phosphorous acid, 0.01 parts of dibutyltin dilaurate, and 7.5 parts of hexamethylene diisocyanate, and heat up to 80°C for 120min. ;

[0029] (2) Add 15 parts of 2-hydroxyethyl acrylate to the reaction system and continue the reaction for 1 min to obtain a phosphorus-containing polyurethane surfactant;

[0030] (3) Cool down the prepared phosphorous polyurethane surfactant to be lower than 40°C, and stir rapidly under the condition of 8000rpm for dispersion;

[0031] (4) In step (3), add a polymerization system obtained by mixing 100 parts of acrylic acid and 80 parts of acrylamide with a neutralization degree of 95%, and stir uniformly under the condition of 8000 rpm;

[0032] (5) After stirring, the temperature is raised to 70°C, and 1 part of potassium persulfate is added for reaction. After constant ...

Embodiment 3

[0034] A preparation method of super absorbent and water-retaining resin includes the following specific steps:

[0035] (1) Mix 20 parts by mass of polyethylene glycol 2000, 2 parts of phosphorous acid, 0.05 parts of dibutyltin dilaurate, and 10 parts of hexamethylene diisocyanate, and heat to 82°C for 140min. ;

[0036] (2) Add 20 parts of 2-hydroxyethyl acrylate to the reaction system and continue to react for 1.5 minutes to obtain a phosphorous-containing polyurethane surfactant;

[0037] (3) Cool down the prepared phosphorous polyurethane surfactant to be lower than 42°C, and stir rapidly under the condition of 8000rpm for dispersion;

[0038] (4) In step (3), add a polymerization system obtained by mixing 110 parts of acrylic acid and 90 parts of acrylamide with a neutralization degree of 98%, and stir uniformly under the condition of 8000 rpm;

[0039] (5) After stirring, the temperature is raised to 72° C., 1.5 parts of potassium persulfate are added to react, and after constan...

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Abstract

The invention provides a preparation method of super-absorbent water-retaining resin. The preparation method comprises the following specific steps: preparing a phosphorus-containing polyurethane surfactant from polyethylene glycol 2000, phosphorous acid, dibutyltin dilaurate, hexamethylene diisocyanate and 2-hydroxyethyl acrylate; and applying the phosphorus-containing polyurethane surfactant toan acrylic acid and acrylamide polymerization system of which the neutralization degree reaches 95%, and uniformly stirring to obtain the super-absorbent water-retaining resin. The phosphorus-containing polyurethane surfactant is applied to resin production, phosphorus in the phosphorus-containing polyurethane surfactant is connected to the middle of a molecular chain, and the molecular chain is used in resin to improve the molecular strength of the resin, so the water absorption and retention rate and the use frequency of the resin are increased, water and soil loss of nursery stocks is effectively enhanced and prevented when the super-absorbent water-retaining resin is used in nursery stock planting, the survival rate of the nursery stocks is increased, and later-period irrigation maintenance cost and labor investment are saved.

Description

Technical field [0001] The invention relates to the field of resins, in particular to a method for preparing super water-absorbing and water-retaining resins. Background technique [0002] In the process of rapid economic development, along with the large-scale construction of roads, road construction projects have also brought damage to the ecological environment. In order to repair the fragmentation of the road alignment to the ecosystem, the destruction of road construction to the environment, and the impact of road traffic on the environment, people have been studying and practicing road greening theories, technologies and methods for a long time. Road greening can effectively improve the traffic environment by planting flowers, grass and trees, and it can achieve many functions such as guiding the line of sight, shading and anti-glare, buffering, coordinating beautification, marking the way, and protecting the environment. [0003] A large part of road greening is seedling pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/06C08F220/56C08G18/73C08G18/67C08G18/66C08G18/48C08G18/32
CPCC08F283/008C08G18/73C08G18/672C08G18/6666C08G18/4833C08G18/388C08F220/06C08F220/56
Inventor 黄建明陈建福张艳龙朱幼箕黄晓丹林惠钗
Owner FUJIAN SPRING ECOLOGICAL TECH CO LTD