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Preparation method of heat-resistant migration-resistant environment-friendly polyether plasticizer

An environmentally-friendly polyester and migration-resistant technology, which is applied in the synthesis of fine chemicals and the application of plastic additives, can solve the problems of PVC matrix softness reduction, poisoning, etc., and achieve the effect of medium viscosity, low color and good compatibility

Active Publication Date: 2018-06-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that a considerable part of phthalate plasticizers migrate from the PVC matrix to other media in contact with it, and the migrated phthalate plasticizers will not only act as endocrine disruptors to poison the human liver, The heart, kidney, lung, testis and other organs of the human body, and the flexibility of the PVC matrix will decrease due to the migration of plasticizers

Method used

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  • Preparation method of heat-resistant migration-resistant environment-friendly polyether plasticizer
  • Preparation method of heat-resistant migration-resistant environment-friendly polyether plasticizer
  • Preparation method of heat-resistant migration-resistant environment-friendly polyether plasticizer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The reaction scheme is as follows:

[0021]

[0022] Add 49.75g (0.345mol) of 1,4-cyclohexanedimethanol, 39.63g (0.30mol) of glutaric acid, 33.24g (0.21mol) of 2-propylheptanol, 0.6g (0.001mol) of tetra-n-butyl titanate as a catalyst, and 10mL of cyclohexane as a water-carrying agent, heated to 205 ° C, refluxed for 7 hours until the acid value Then reduce the reaction product under the condition of -0.1MPa, and remove the unreacted 1,4-cyclohexanedimethanol and the end-capping agent 2-propylheptanol by vacuum distillation to recover and utilize the obtained substrate It is a refined polyester plasticizer product.

[0023] figure 1 It can be seen that there are still differences in the infrared spectrum of the raw material and the product. In the infrared spectrum of 1,4-cyclohexanedimethanol, it can be seen that at 3321cm -1 is the stretching vibration peak of -OH at 2917cm -1 and 2847cm -1 is the symmetrical and asymmetric stretching vibration peak of -C-H, at...

Embodiment 2

[0028] A preparation method of a heat-resistant, migration-resistant and environmentally friendly polyester plasticizer, using glutaric acid, 1,4-cyclohexanedimethanol and 2-propylheptanol as main raw materials, and obtaining polyester-type plasticizers through esterification and polycondensation Environmentally friendly plasticizer, the specific steps are as follows:

[0029] (1) Esterification and polycondensation reaction: Add the reactants glutaric acid, 1,4-cyclohexanedimethanol and 2-propylheptanol into the reactor, and then add the catalyst, water-carrying agent and end-capping agent;

[0030] The alkyd molar ratio of 1,4-cyclohexanedimethanol to glutaric acid is 1:1, the molar ratio of the amount of capping agent 2-propylheptanol to glutaric acid is 0.4:1, and the mass of the catalyst It is 0.3% of the total mass of alkyd, and the consumption of water-carrying agent is 5% of the total mass of reactants;

[0031] Stir and heat the above raw materials to 140°C within 10...

Embodiment 3

[0037] A preparation method of a heat-resistant, migration-resistant and environmentally friendly polyester plasticizer, using glutaric acid, 1,4-cyclohexanedimethanol and 2-propylheptanol as main raw materials, and obtaining polyester-type plasticizers through esterification and polycondensation Environmentally friendly plasticizer, the specific steps are as follows:

[0038] (1) Esterification and polycondensation reaction: Add the reactants glutaric acid, 1,4-cyclohexanedimethanol and 2-propylheptanol into the reactor, and then add the catalyst, water-carrying agent and end-capping agent;

[0039]The alkyd molar ratio of 1,4-cyclohexanedimethanol to glutaric acid is 1.2:1, the molar ratio of the amount of capping agent 2-propylheptanol to glutaric acid is 0.9:1, and the mass of the catalyst It is 0.7% of the total mass of alkyd, and the consumption of water-carrying agent is 15% of the total mass of reactants;

[0040] Stir and heat the above raw materials to 150°C within ...

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Abstract

A preparation method of a heat-resistant migration-resistant environment-friendly polyether plasticizer. The invention belongs to the field of fine chemical synthesis and plastic additive application.The method includes steps of: with glutaric acid, 1,4-cyclohexane dimethanol and 2-propyl heptanol as main raw materials, performing esterification condensation polymerization to modify molecular structures and convert functional groups, thus producing a crude product, environment-friendly polyether plasticizer; and then performing water-carrying agent removal and alcohol removal separation to purify the product 1,4-cyclohexane dimethanol polyglutarate. The target molecule has a structure of a straight-chain low polymer in which the cyclohexyl group, having a ring structure, is combined witha linear molecule, so that the product has the features of both the ring molecules and linear molecules. The polyether plasticizer has moderate viscosity and light color, is free of o-benzene and benzene ring structure, has good compatibility with PVC, is heat-resistant and migration-resistant and is suitable for industrial production. The novel environment-friendly polyether plasticizer may replace conventional phthalic acid-type plasticizers.

Description

technical field [0001] The invention relates to a preparation method of a heat-resistant, migration-resistant and environment-friendly polyester plasticizer, which belongs to the field of synthesis of fine chemicals and application of plastic additives. Background technique [0002] Polyvinyl chloride (PVC) is the most widely used thermoplastic material today due to its low cost, good flame retardancy, good electrical properties and excellent chemical resistance. Flexible PVC is widely used in places where the human body can touch, such as medical equipment, electronic equipment, building materials, baby care products, toys and food packaging and other fields. Flexible PVC contains large amounts of liquid plasticizers. The most added amount and the most widely used are phthalate plasticizers, accounting for about 70% of the entire plasticizer product. Due to its low price and good performance, phthalate bis(2-ethylhexanoic acid) ) Esters (DOP) account for at least about 60...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/199C08L27/06C08L67/02
CPCC08G63/199C08G63/20C08L27/06C08L2201/08C08L67/02
Inventor 蒋平平章立鹏王迎春郑付林闻月
Owner JIANGNAN UNIV
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