Environment-friendly polyvinyl chloride elasticizer and method of preparing the same

A technology of polyvinyl chloride and plasticizer, applied in the field of environment-friendly plasticizer composition, can solve the problems of poor transparency of PVC film, increase the amount of epoxy vegetable oil added, increase the difficulty of injection molding processing, etc., and achieve low Viscosity, reduced viscosity, high production efficiency

Inactive Publication Date: 2011-06-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with phthalate plasticizers, epoxy vegetable oil plasticizers show extremely excellent properties in terms of product light and heat stability, but traditional epoxy vegetable oils have the following problems: (1) Compatibility with plastics such as PVC Poor compatibility, when the added amount increases or the ambient temperature is high, precipitation often occurs, which seriously affects the quality of the product, so it can only be used as an auxiliary plasticizer
(2) The fluidity of epoxy soybean oil is low, and the poor compatibility with PVC powder will lead to poor transparency of PVC film produced by calendering method, and prone to defects
(3) The viscosity is higher than that of phthalate plasticizers, and the viscosity of the mixture with PVC powder is relatively higher, which increases the processing difficulty of injection molding, especially for gelatinized PVC powder. The viscosity of PVC paste is adjusted by adding plasticizers. In order to meet the viscosity requirements of molding processing, it is necessary to increase the amount of epoxy vegetable oil added, which increases the product cost and easily leads to the precipitation of plasticizers.

Method used

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  • Environment-friendly polyvinyl chloride elasticizer and method of preparing the same

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Experimental program
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Effect test

Embodiment 1

[0029] The preparation method of this environment-friendly plasticizer comprises the steps:

[0030] (1) Modification treatment of epoxy soybean oil: when the epoxy soybean oil oil bath is heated to 90°C, add dropwise The mixed solution of acrylic acid, epoxidized soybean oil: triphenylphosphine: triethylbenzylamine bromide: triethylamine: hydroquinone: acrylic acid is 100:0.1:0.5:0.1:1.0:20 by mass ratio. Control the rate of addition to complete the dropwise addition of the mixed solution within 60 minutes. After the dropwise addition of the mixed solution is completed, the oil temperature is raised to 135° C., and the reaction is stopped after continuing the constant temperature reaction for 3.5 hours. Firstly, the product was washed with 50° C. pure soda water until the pH value was 6, and then the product was washed with saturated saline and soft water successively until the pH value was 7.

[0031] (2) Dehydration treatment: the modified epoxy soybean oil obtained in ste...

Embodiment 2

[0039] The preparation method of this environment-friendly plasticizer comprises the steps:

[0040] (1) Modification treatment of epoxy soybean oil: when the epoxy soybean oil oil bath is heated to 65°C, dropwise add Mixed solution of diphenol and acrylic acid, epoxy soybean oil: triphenylphosphine: didodecyldimethylammonium bromide: triethylamine: hydroquinone: acrylic acid in a mass ratio of 100:2.0:3.5: 3.0:0.02:20. Control the rate of addition to complete the dropwise addition of the mixed solution within 20 minutes. After the dropwise addition of the mixed solution is completed, the oil temperature is raised to 95° C., and the reaction is stopped after continuing the constant temperature reaction for 1.5 hours. Firstly, the product was washed with 50°C soda water until the pH value was 5, and then the product was washed with saturated saline and soft water successively until the pH value was 7.

[0041] (2) Dehydration treatment: the modified epoxidized soybean oil obt...

Embodiment 3

[0044] (1) Modification treatment of epoxy soybean oil: when the epoxy soybean oil oil bath is heated to 85°C, dropwise add triphenylphosphine, tetraoctyl ammonium chloride, ethylenediamine, hydroquinone and acrylic acid Mixed solution, epoxy soybean oil: triphenylphosphine: tetraoctyl ammonium chloride: triethylamine: hydroquinone: acrylic acid in mass ratio of 100:1.0:1.5:1.0:0.02:5. Control the rate of addition to complete the dropwise addition of the mixed solution within 40 minutes. After the dropwise addition of the mixed solution is completed, the oil temperature is raised to 95° C., and the reaction is stopped after continuing the constant temperature reaction for 3.5 hours. Firstly, the product was washed with 50° C. pure soda water until the pH value was 6, and then the product was washed with saturated saline and soft water successively until the pH value was 7.

[0045] (2) Dehydration treatment: the modified epoxidized soybean oil obtained in step (1) is transferr...

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Abstract

The invention relates to a method for preparing environment-friendly PVC plasticizer, including the following steps: epoxy vegetable-oil acrylic acid is modified; dehydration is conducted; and the compound compatible to epoxy vegetable-oil is prepared. The achieved plasticizer does not contain phthalate, and can completely substitute phthalate and serve as plasticizer during the process of PVC contour matching.

Description

technical field [0001] The invention relates to an environment-friendly plasticizer composition for polyvinyl chloride resin. The environment-friendly plasticizer composition of the present invention includes at least one epoxy vegetable oil and does not contain any phthalate compounds. Background technique [0002] Polyvinyl chloride (PVC for short) is a thermoplastic general-purpose resin, which is widely used in many fields such as artificial leather, toys, composite films, and wire insulation materials. Polyvinyl chloride has excellent comprehensive properties, is cheap and easy to obtain, and has mature production technology. The current output accounts for 20% of all plastics. However, PVC has a high melting point and is difficult to process and shape. Therefore, plasticizers must be added during processing to improve plasticity. Phthalates are the most widely used PVC plasticizers with the best performance. The global annual consumption of phthalate plasticizers exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/00C08K5/101C08K5/1515C08L27/06C08L71/02
Inventor 司徒粤胡剑峰瞿金清陈焕钦
Owner SOUTH CHINA UNIV OF TECH
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