Method for turning biomass cardanol into chloroprene rubber internal plasticizer by click chemistry

A technology of neoprene and click chemistry, which is applied in the field of preparing plasticizers, can solve problems such as not causing

Inactive Publication Date: 2019-03-29
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cardanol is the main component of cashew nut shell oil and is a by-product of cashew nut oil. It is easy to extract, rich in resources, and low in price. It has good compatibility with most rubbers, because there is a 15 in the meta-position of diphenol in its chemical structure. An unsaturated carbon-hydrogen substitution chain with two carbons, so it has both the characteristics of phenolic compounds and the flexibility of aliphatic compounds, so it is often used as a modifier for phenolic resins, but as a rubber plasticizer, it has not yet attracted people's attention. much attention

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  • Method for turning biomass cardanol into chloroprene rubber internal plasticizer by click chemistry

Examples

Experimental program
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Effect test

example 1

[0024] (1) Synthesis of propargyl ether cardanol (CP)

[0025] Measure 5L of ethanol with a graduated cylinder and add it to a three-necked flask, then add cardanol (600g) and heat to 70°C and stir until completely dissolved. Weigh 3-bromopropyne (288g) according to the molar ratio of 3-bromopropyne and cardanol 1.2:1, weigh potassium hydroxide (134g) and dissolve it in ethanol to prepare a solution, and slowly add hydrogen into the four-neck flask Potassium oxide and 3-bromopropyne reacted at a certain temperature for 24 hours, then stopped the reaction and cooled to room temperature, and the product was distilled under reduced pressure to remove water and solvent. After vacuum drying at 55°C for 24 h, a reddish-brown viscous product was obtained.

[0026] (2) Synthesis of azide functional neoprene (CR-N 3 )

[0027] Weigh 100g of neoprene and put it into a 5L three-necked bottle, add 3L of mixed solvent and stir to dissolve. After obtaining a colloidal solution, take 50g ...

example 2

[0031] (1) Synthesis of propargyl ether cardanol (CP)

[0032] Measure 5L of ethanol with a graduated cylinder and add it to a three-necked flask, then add cardanol (470g) and heat to 70°C and stir until completely dissolved. Weigh 3-bromopropyne (148g) according to the molar ratio of 3-bromopropyne and cardanol 1.2:1, weigh potassium hydroxide (107g) and dissolve it in ethanol to prepare a solution, and slowly add hydrogen into the four-neck flask Potassium oxide and 3-bromopropyne reacted at a certain temperature for 24 hours, then stopped the reaction and cooled to room temperature, and the product was distilled under reduced pressure to remove water and solvent. After vacuum drying at 55°C for 24 h, a reddish-brown viscous product was obtained.

[0033] (2) Synthesis of azide functional neoprene (CR-N 3 )

[0034] Weigh 87g of neoprene and put it into a 5L three-neck bottle, add 3L of mixed solvent and stir to dissolve. After obtaining a colloidal solution, take 42gNaN ...

example 3

[0038] (1) Synthesis of propargyl ether cardanol (CP)

[0039] Measure 5L of ethanol with a graduated cylinder and add it to a three-necked flask, then add cardanol (752g) and heat to 70°C and stir until completely dissolved. Weigh 3-bromopropyne (302g) according to the molar ratio of 3-bromopropyne and cardanol 1.2:1, weigh potassium hydroxide (152g) and dissolve it in ethanol to prepare a solution, and slowly add hydrogen into the four-neck flask Potassium oxide and 3-bromopropyne were reacted at a certain temperature for 24 hours, then the reaction was stopped and cooled to room temperature, and the product was distilled under reduced pressure to remove water and solvent. After vacuum drying at 55°C for 24 h, a reddish-brown viscous product was obtained.

[0040] (2) Synthesis of azide functional neoprene (CR-N 3 )

[0041] Weigh 117g of neoprene and put it into a 5L three-necked bottle, add 3L of mixed solvent and stir to dissolve. After obtaining a colloidal solution, ta...

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Abstract

Relating to a plasticizer preparation method, the invention discloses a method for turning biomass cardanol into a chloroprene rubber internal plasticizer by click chemistry. The method includes: firstly reacting cardanol with propargyl bromide to prepare propargyl ether cardanol and chloroprene rubber with an azido structure, then carrying out click chemistry reaction to realize reaction of the propargyl ether cardanol and chloroprene rubber with an azido structure, thus realizing internal plasticization of chloroprene rubber. The method for internal plasticization of chloroprene rubber withthe natural biomass raw material by click chemistry reaction disclosed by the invention has the advantages that: the cardanol raw material is sufficient, the chemical reaction process is simple, the product has obvious plasticization effect, excellent thermal stability and near zero migration of plasticizer, therefore the chloroprene rubber internal plasticizer is a new product conforming to the green and environment-friendly circular economy concept and has very broad market prospects.

Description

technical field [0001] The invention relates to a method for preparing a plasticizer, in particular to a method for converting biomass cardanol into a neoprene internal plasticizer through click chemistry. Background technique [0002] Chloroprene rubber is an elastomer mainly obtained by homopolymerization or copolymerization of 2-chloro-1,3-butadiene monomer. Because its molecular chain contains a large number of polar chlorine atom groups, the double bond activity on the long chain is reduced, and the chloroprene rubber has great stability to non-polar substances, so that it has good physical properties. Mechanical properties, excellent performance in oil resistance, heat resistance, flame retardancy, chemical corrosion resistance and sealing. Widely used in industrial rubber products, wire and cable protective jackets, oil-resistant hoses, rubber seals and automobile manufacturing and other fields. However, chloroprene rubber has the disadvantages of poor cold resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/00C08C19/22
CPCC08C19/00C08C19/22
Inventor 张文政蒋宁黄丽张婷婷
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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