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Fatty acid polyester PVC plasticizer and preparation method thereof

A technology of fatty acid esters and fatty acid monoesters, which is applied in the preparation of bio-based PVC plasticizer fatty acid polyesters, in the field of environmental protection, and can solve the problems of large differences in the purity of oil-based plasticizers, product performance differences, and easy precipitation. , to achieve the effects of less side reactions, shortened production time, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2019-07-23
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular structure of the oil-based plasticizer modified by epoxidation alone determines that it cannot be used as the main plasticizer for PVC. In addition, due to the large difference in the purity of the oil-based plasticizer, the product performance is also quite different. PVC resin has poor compatibility and is easy to precipitate, so it can only be used as an auxiliary plasticizer. This is also the fatal flaw of current oil-based plasticizers, so the quality is poor and the price is low

Method used

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  • Fatty acid polyester PVC plasticizer and preparation method thereof
  • Fatty acid polyester PVC plasticizer and preparation method thereof
  • Fatty acid polyester PVC plasticizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The first step, the preparation of epoxidized fatty acid glyceride (epoxidized soybean oil ESO): get the hydrogen peroxide 45mL of 35wt.% concentration and add dropwise to 50g soybean oil (iodine value 122), 3mL formic acid and 0.1g concentrated sulfuric acid In the three-necked flask used as a catalyst, control the hydrogen peroxide to be added dropwise within 1.0h, and the temperature is not higher than 65°C, then keep the temperature at 65°C for 2h, neutralize with 4wt.% sodium carbonate solution after the reaction, wash with water until neutral , and then dried to obtain epoxidized soybean oil with an epoxy value of 6.2% pale yellow.

[0028] The second step, epoxidized fatty acid glyceride and small molecule alcohols transesterification reaction prepares epoxidized fatty acid ester: the epoxidized soybean oil 50g that last step makes, 20g methyl alcohol (water content is less than 0.2wt.%) React with 0.5g of sodium methoxide catalyst in a 250ml three-water flask at...

Embodiment 2

[0031] The first step, the preparation of epoxidized fatty acid glyceride (epoxidized rapeseed oil): get the hydrogen peroxide 50mL of 35wt. In the three-necked flask with sulfuric acid as the catalyst, control the hydrogen peroxide to be added dropwise within 1.0 h, and the temperature is not higher than 65 ° C, and then keep the temperature at 65 ° C for 2 h. After the reaction, neutralize with 4wt.% sodium carbonate solution and wash with water until properties, and then dried to obtain epoxy value of 5.8% pale yellow epoxidized rapeseed oil. The second step, epoxidized fatty acid glyceride and small molecule alcohols transesterification reaction prepare epoxidized fatty acid ester: the epoxidized rapeseed oil 50g that last step makes, 20g methyl alcohol (water content is less than 0.2wt.%) ) and 0.45g potassium methylate catalyst in the three-water flask of 250ml, 55 ℃ of conditions reacted 12min, then layered to remove the by-product glycerol, and the supernatant liquid w...

Embodiment 3

[0034] The first step, preparation of epoxidized fatty acid glyceride (epoxidized corn oil): get 50mL of hydrogen peroxide of 35wt.% concentration and add dropwise to 50g corn oil (iodine value 108), 4mL formic acid and 0.1g concentrated sulfuric acid to make In the three-necked flask of the catalyst, control the hydrogen peroxide to be added dropwise within 1.0 h, and the temperature is not higher than 65 ° C, and then keep the temperature of 65 ° C for 2 h. After the reaction, neutralize with 4wt.% sodium carbonate solution and wash with water until neutral. Then dry to obtain epoxidized corn oil with an epoxy value of 6.0% pale yellow.

[0035] Second step, epoxidized fatty acid glyceride and small molecule alcohols transesterification reaction prepares epoxidized fatty acid ester: the epoxidized corn oil 50g that last step makes, 35g ethanol (water content is less than 0.2wt.%) React with 0.6g of lithium hydroxide catalyst in a 250ml three-water flask at 55°C for 15min, th...

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Abstract

The invention discloses a fatty acid polyester PVC plasticizer and a preparation method thereof, which is mainly applied to soft PVC plastic products. The method mainly comprises processes as follows:(1) epoxidation preparation process of fatty glyceride, (2) preparation of epoxy fatty acid monoester through a transesterification of the epoxy fatty glyceride and (3) preparation of the fatty acidpolyester PVC plasticizer through ring opening and esterification reactions of the epoxy fatty acid monoester. The prepared plasticizer is a light yellow (hazen smaller than or equal to 350) transparent liquid have the viscosity range of 500-1,500 mPa.s, acid value smaller than 1.0 mg / g and open flash point larger than 200 DEG C. Used raw materials are widely sourced and can be regenerated, the plasticizer has the advantages of high flash point, volatility resistance, precipitation resistance, cold resistance and better plastification efficiency due to high polar bond content and existence oflong aliphatic chains in molecules of the plasticizer, can improve thermal stability of PVC products and can completely replace DOP to prepare PVC products with special performance.

Description

technical field [0001] The invention belongs to the field of bio-based materials, and relates to a method for preparing an environment-friendly, bio-based PVC plasticizer fatty acid polyester. Background technique [0002] Plasticizers are plastic additives that can be added to polymer materials to change the plasticity of the material, making it easier to process and making the product softer. PVC plasticizer is one of the fine chemicals with an amount of more than one million tons in my country at present, of which ortho-benzene plasticizers account for more than 80%. With increasing emphasis on safety and environmental protection, the market and usage of non-phthalic environment-friendly plasticizers are increasing day by day. There are more than a hundred types of plasticizer products in the market, and the production process and raw material composition are also varied. The four plasticizer products, DOP, DOTP, DBP, and DINP, are the most widely used. However, with the ...

Claims

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Application Information

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IPC IPC(8): C07C67/31C07C69/67C07D303/42C07D301/00C07D301/12C08L27/06C08K5/11
CPCC07C67/31C07C69/67C07D301/00C07D301/12C07D303/42C08K5/11C08L27/06
Inventor 冯国东周永红马艳贾普友张猛刘承果
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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