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Polyol ester and preparation method thereof

A technology for polyol esters and preparation steps, applied in the field of polyol esters and their preparation, can solve problems such as poor compatibility, hinder smooth processing, affect product transparency, etc., achieve good compatibility, and improve the phenomenon of "zinc burning" , Good long-term thermal stability effect

Pending Publication Date: 2022-04-29
广东科力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the polyol auxiliary heat stabilizer has strong water solubility, poor compatibility with PVC and plasticizers, and is easy to sublimate, so the dosage should not be too large, otherwise it will be deposited on the equipment during processing, hindering the smooth progress of processing and affecting product transparency

Method used

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  • Polyol ester and preparation method thereof
  • Polyol ester and preparation method thereof
  • Polyol ester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present embodiment provides a kind of polyol ester, obtained according to the following steps:

[0033] Add 73.1g (0.5mol) adipic acid and 254.3g (1.0mol) dipentaerythritol to a 500mL four-necked flask equipped with a stirrer, a thermometer and a water-separating condensing reflux device, add 0.25g phosphoric acid as a catalyst, and add 15g toluene as a With water agent, heated to 140 ° C for esterification reaction, the reaction time was 9 hours, the acid value was measured to be 1.24 mg KOH / g, the reaction reached the end point, and the reaction ended.

[0034] The residual water agent and water are removed by distillation under reduced pressure, and the product is dried to obtain polyol ester. The structural formula of the product is:

[0035]

[0036] Get the polyol ester that the present embodiment makes, carry out infrared spectroscopic analysis to it, the result is as follows figure 1 shown. Table 1 is the assignment of each peak of the infrared spectrum...

Embodiment 2

[0040] The present embodiment provides a kind of polyol ester, obtained according to the following steps:

[0041] Add 73.1g (0.5mol) adipic acid and 254.3g (1.0mol) dipentaerythritol to a 500mL four-necked flask equipped with a stirrer, a thermometer and a water-separating condensing reflux device, add 0.3g p-toluenesulfonic acid as a catalyst, add 20 g of xylene was used as a water-carrying agent, heated to 180° C. to carry out esterification reaction, the reaction time was 6 hours, the acid value was measured to be 1.46 mgKOH / g, the reaction reached the end point, and the reaction ended. The residual water agent and water are removed by distillation under reduced pressure, and the product is dried to obtain polyol ester. The structural formula of the product is:

[0042]

[0043] Get the polyol ester that the present embodiment makes, carry out infrared spectroscopic analysis to it, the result is as follows figure 2 shown. Table 2 is the attribution of each peak of th...

Embodiment 3

[0047] The present embodiment provides a kind of polyol ester, obtained according to the following steps:

[0048] Add 73.1g (0.5mol) adipic acid and 254.3g (1.0mol) dipentaerythritol to a 500mL four-necked flask equipped with a stirrer, a thermometer and a water-separating condensing reflux device, add 0.25g stannous chloride as a catalyst, add 20 g of cyclohexane was used as a water-carrying agent, heated to 240° C. to carry out esterification reaction, the reaction time was 3 hours, the acid value was measured to be 1.53 mgKOH / g, the reaction reached the end point, and the reaction ended. The residual water agent and water are removed by distillation under reduced pressure, and the polyol ester is obtained after the product is dried. The structural formula of the product is:

[0049]

[0050] Get the polyol ester that the present embodiment makes, carry out infrared spectrum analysis to it, the result is as follows image 3 shown. Table 3 is the assignment of each peak...

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Abstract

The invention provides polyol ester and a preparation method thereof. The preparation method comprises the following preparation steps: S1, selecting main materials of adipic acid and dipentaerythritol as raw materials; s2, adipic acid and dipentaerythritol are added into mixing equipment according to a certain proportion, then a catalyst and a water-carrying agent are added, and certain heating is conducted to achieve an esterification reaction; s3, after reacting for a certain time, determining an acid value, and ending the reaction after the acid value reaches the standard; and S4, after the reaction in the step S3 is finished, removing the residual water-carrying agent and water through reduced pressure distillation, and drying the product to obtain the polyol ester.

Description

technical field [0001] The invention relates to the technical field of polyol preparation, and mainly relates to a polyol ester and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is the second largest general-purpose plastic after polyethylene (PE). It has the advantages of high strength, plasticization, corrosion resistance, flame retardancy, good insulation and high transparency. Wide range of uses. However, PVC has the disadvantage of poor thermal stability and severe degradation at normal processing temperatures. Therefore, appropriate heat stabilizers must be added to inhibit its degradation during PVC processing. At present, there are many types of heat stabilizers available on the market. Unfortunately, until now, there is no universal heat stabilizer that can meet the processing needs of various PVC products in terms of technology, economy and sanitation and environmental performance. Therefore, the rational design of the hea...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/44C08K5/11C08L27/06
CPCC07C67/08C07C69/44C08K5/11C08L27/06
Inventor 梁国伟蔡博伟梁国超谢铭国梁思伟
Owner 广东科力新材料有限公司
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