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O-phthalic acid polyester plasticizer and its preparation method

A technology of phthalic acid and polyester plasticizers, applied in the field of polyester plasticizers, can solve problems such as carcinogenicity and controversy

Inactive Publication Date: 2006-08-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the most commonly used plasticizer is the monomeric form of diethylhexyl phthalate (DOP), its use is controversial due to its carcinogenic potential

Method used

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  • O-phthalic acid polyester plasticizer and its preparation method
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  • O-phthalic acid polyester plasticizer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 The preparation of poly-1,2-propylene glycol phthalate

[0037] Put phthalic anhydride, 1,2-propanediol, 2-ethylhexanol and catalyst tetra-n-butyl titanate into the reaction kettle, wherein the molar ratio of 1,2-propanediol to phthalic anhydride is 1.10:1 , the molar ratio of 2-ethylhexanol to phthalic anhydride is 0.6: 1, and the consumption of tetra-n-butyl titanate is 3‰ of the total mass of the reaction material in terms of mass, and the reaction is stirred under nitrogen and normal pressure, slowly Raise the temperature to 190°C until the acid value is lower than 15mgKOH / g, cool to 80°C, depressurize to a residual pressure of 0.04MPa under nitrogen bubbling, gradually raise the temperature to 220°C and react until the acid value is lower than 2mgKOH / g, cool the reactor The medium liquid is poly-1,2-propylene glycol phthalate.

Embodiment 2

[0038] Embodiment 2 The preparation of poly-1,3-butylene phthalate

[0039]Put phthalic anhydride, 1,3-butanediol, 2-ethylhexanol and catalyst tetra-n-butyl titanate into the reaction kettle, wherein the molar ratio of 1,3-butanediol to phthalic anhydride 1.12:1, the molar ratio of 2-ethylhexanol to phthalic anhydride is 0.55:1, and the consumption of tetra-n-butyl titanate is 3.5‰ of the total mass of the reaction material by mass, under the normal pressure of nitrogen Stir the reaction, gradually raise the temperature to 195°C until the acid value is lower than 15mgKOH / g, cool to 80°C, depressurize to a residual pressure of 0.04MPa under nitrogen bubbling, gradually raise the temperature to 220°C and react until the acid value is lower than 2mgKOH / g, After cooling, the liquid in the reactor is poly-1,3-butylene phthalate.

Embodiment 3

[0040] Embodiment 3 The preparation of poly-1,4-butylene phthalate

[0041] Put phthalic anhydride, 1,4-butanediol, 2-ethylhexanol and catalyst tetra-n-butyl titanate into the reaction kettle, wherein the molar ratio of 1,4-butanediol to phthalic anhydride For 1.15: 1, the mol ratio of 2-ethylhexanol and phthalic anhydride is 0.5: 1, and the consumption of tetra-n-butyl titanate is expressed as the total mass of the reaction mass by mass

[0042] 4‰, stirring and reacting under nitrogen gas under normal pressure, slowly raising the temperature to 200°C until the acid value is lower than 15mgKOH / g, cooling to 80°C, reducing pressure to a residual pressure of 0.04MPa under nitrogen bubbling, gradually raising the temperature to 220°C and reacting to The acid value is lower than 2mgKOH / g, and the liquid in the reactor after cooling is poly-1,4-butylene phthalate.

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Abstract

The present invention provides a kind of phthalic polyester plasticizers and their preparation method, belonging to the field of polyester plasticizer technology. Said invention includes the products of poly-1,2-propylene glycol ester phthalate, poly-1,3-butylene glycol ester phthalate and poly-1,4-butylene glycol ester phthatae. Said products are made up by using phthalic anhydride and correspondent dibasic alcohol and 2-ethylhexanol and using tetrabutyl titanate as catalyst through a certain polymerization reaction.

Description

technical field [0001] A phthalic acid polyester plasticizer and a preparation method thereof relate to the technical field of polyester plasticizers. Specifically, it relates to a phthalate polyester plasticizer with good extraction resistance, good insulation performance, good thermal stability and substantially non-toxicity. Background technique [0002] Plasticizers are the most widely used plastic additives, which play an important role in improving the mechanical properties of plastic and rubber products. At present, the plasticizer industry has formed one of the important fine chemical industries based on petrochemical industry and mainly based on phthalic acid monomer esters. [0003] Since most of the currently used plasticizers are monomeric esters with relatively low molecular weight and poor compatibility with polymer materials, they are easily extracted by oils or organic solvents, which affects the application performance of products. This kind of problem is ...

Claims

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Application Information

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IPC IPC(8): C08G63/183
Inventor 蒋平平费柳月
Owner JIANGNAN UNIV
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