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High-molecular polymer solid water degradable cross-linking agent reaction method and device

A technology of high molecular polymer and reaction device, which is applied in chemical/physical/physical-chemical fixed reactors, feeding devices, chemical instruments and methods, etc. Reaction efficiency and uniformity, etc., to achieve the effect of improving water absorption, improving yield, improving hydrophilicity and swelling rate

Pending Publication Date: 2021-11-05
徐州莫大新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The linear or branched polymer chains of the modified water-absorbing polymer monomers can be cross-linked and covalently connected to form a network or body-shaped polymer, which can improve the physical and chemical properties of the polymer. The commonly used cross-linking agent N, Polymers prepared from N-dimethylformamide and N,N-methylenebisacrylamide are generally non-degradable, which limits the application of solid water in the field of agriculture and forestry. Deposition on the wall affects the reaction efficiency and uniformity of the crosslinking agent, making it difficult to meet the mass production requirements of polymer solid water

Method used

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  • High-molecular polymer solid water degradable cross-linking agent reaction method and device
  • High-molecular polymer solid water degradable cross-linking agent reaction method and device
  • High-molecular polymer solid water degradable cross-linking agent reaction method and device

Examples

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Effect test

Embodiment 1

[0028] A kind of high molecular polymer solid water degradable crosslinking agent reaction method, its specific steps are:

[0029] S1: Add 12kg of polyester, 130g of amino acid monomer, 100L of dimethyl sulfoxide, and 50L of dichloromethane into the reactor 1 from the feed pipe 25 at the top of the reactor 1 and stir for 15 minutes at a stirring rate of 120r / min. ; The polyester is polylactic acid, and the amino acid monomer is a combination of glycine and aspartic acid in a mass ratio of 1:1;

[0030] S2: Add 138g of acrylic acid into the reactor 6 from the feed pipe 25 of the upper inlet 7, control the three-way valve 29, open the circulation pump 27, and put the polyester, amino acid monomer, dimethyl sulfoxide and dichloro The mixed solution of methane enters the reactor 6 from the circulation pipe 26, through the side inlet 14, and enters the reactor 1 from the bottom outlet 16 in parallel flow, and stirs and circulates and disperses for 15 minutes at a stirring rate of ...

Embodiment 2

[0035] A kind of high molecular polymer solid water degradable crosslinking agent reaction method, its specific steps are:

[0036] S1: Add 14kg of polyester, 90g of amino acid monomer, 100L of dimethyl sulfoxide, and 50L of dichloromethane into the reactor 1 from the feed pipe 25 at the top of the reactor 1 and stir for 12 minutes at a stirring rate of 130r / min. ; The polyester is polycaprolactone, and the amino acid monomer is a combination of L-lysine and leucine in a mass ratio of 1:1;

[0037] S2: Add 165g of acrylic acid into the reactor 6 from the feed pipe 25 of the upper inlet 7, control the three-way valve 29, open the circulation pump 27, and put the polyester, amino acid monomer, dimethyl sulfoxide and dichloro The mixed solution of methane enters the reactor 6 from the circulation pipe 26 through the side inlet 14, and enters the reactor 1 from the bottom outlet 16 in parallel flow, and is stirred and circulated for 12 minutes at a stirring rate of 130 r / min;

[...

Embodiment 3

[0042] A kind of high molecular polymer solid water degradable crosslinking agent reaction method, its specific steps are:

[0043] S1: Add 8 kg of polyester, 100 g of amino acid monomer, 100 L of dimethyl sulfoxide, and 50 L of dichloromethane into the reactor 1 from the feed pipe 25 at the top of the reactor 1 and stir for 14 minutes at a stirring rate of 135 r / min. The polyester is composed of polylactic acid and polyvinyl alcohol in a mass ratio of 1:1, and the amino acid monomer is composed of serine and alanine in a mass ratio of 1:1;

[0044] S2: Add 90 g of acrylic acid into the reactor 6 from the feed pipe 25 of the upper inlet 7, control the three-way valve 29, and turn on the circulation pump 27, and the polyester, amino acid monomer, dimethyl sulfoxide and dichloromethane in the reactor 1 are The mixed solution of methane enters the reactor 6 from the circulation pipe 26 through the side inlet 14, and enters the reactor 1 from the bottom outlet 16 in parallel flow,...

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Abstract

The invention relates to a high-molecular polymer solid water degradable cross-linking agent reaction method and device, wherein the method comprises the steps: dissolving polyester and an amino acid monomer in a mixed solution of dimethyl sulfoxide and dichloromethane in a reaction device, adding acrylic acid for cyclic dispersion, adding citraconic anhydride and an initiator for cyclic polymerization reaction, recovering dichloromethane in vacuum, adding water for stir precipitation, carrying out discharge filtration, and carrying out vacuum drying. The reaction device comprises a reaction kettle, a rotating stirrer is arranged in the reaction kettle, a reactor at the top of the reaction kettle comprises an upper sleeve, a middle sleeve and a bottom sleeve, a first flow cavity is formed in the upper sleeve and the middle sleeve, an impeller and a middle column are arranged in the first flow cavity, and a second flow cavity is formed between the middle sleeve and the bottom sleeve; and a degradable polyester amino acid monomer is subjected to grafting reaction with acrylic acid and citraconic anhydride under the action of an initiator to prepare a modified polypeptide grafted polymer cross-linking agent, the efficiency is improved through circular reaction, and the modified polypeptide grafted polymer cross-linking agent can serve as a cross-linking agent to be used for preparing high-molecular polymer solid water to improve water absorption, water retention and degradability.

Description

technical field [0001] The invention relates to a polymer solid water degradable crosslinking agent reaction method and device, belonging to the technical field of solid water production. Background technique [0002] At present, polyacrylamide / acrylate water-absorbing resin is the main product of water-retaining water-absorbing resin. It can absorb hundreds of times its own weight of water, and the solid water will not evaporate when exposed to the air, and will not infiltrate when it spreads into the soil. It can be reduced to free water and released in the soil with microorganisms around the plant root system. It can be widely used in agriculture, forestry, In fields such as hydraulic power and sand industry, it can play a variety of functions such as drought resistance and seedling protection, increase production and income, soil improvement, windbreak and sand fixation, and water and soil conservation. The linear or branched polymer chains of the modified water-absorbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/02C08F220/06C08F222/04C08G69/10B01J19/18B01J19/00B01J4/00
CPCC08F283/02C08G69/10B01J19/18B01J19/0053B01J19/0066B01J19/0006B01J19/002B01J4/001B01J4/007B01J4/002B01J4/008B01J2204/002C08F220/06C08F222/04
Inventor 雅罗斯拉夫杨晓磊柳宏伟
Owner 徐州莫大新材料科技有限公司
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