Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof

A technology of nadic acid anhydride and polyester plasticizer, which is applied in the field of unsaturated polyester plasticizers, can solve the problems of poor PVC compatibility, small molecular weight, and single performance, and achieve improved weather resistance, less by-products, low cost effect

Active Publication Date: 2012-03-28
安徽新鸿药业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a non-toxic and environmentally friendly nadic anhydride polyester plasticizer and a preparation method thereof, aiming at the disadvantages of traditional plasticizers such as small molecular weight, p

Method used

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  • Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof
  • Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof
  • Non-toxic environmentally friendly nadic anhydride polyester plasticizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] Into a 250mL four-necked flask were added 0.20mol of Nadic anhydride, 0.22mol of methyl propylene glycol, 0.08mol of 2-ethylhexanol, 6.67mL of cyclohexane with water, 0.02g (0.03% of the total mass) tetratitanate n-Butyl ester, nitrogen is introduced to protect the reaction system from being oxidized and avoid causing various side reactions, start stirring, slowly heat up, start timing when water comes out, keep the heating rate at 10°C / h, when the temperature rises to At 170 °C, the nitrogen flow rate was reduced, and the maximum temperature did not exceed 220 °C to ensure the safety of the experiment. The acid value is measured every 1h, the calculation of the acid value refers to GB / T 1668-2008, the reaction is 6h, the acid value is reduced to 0.51mgKOH / g, the esterification rate is greater than 99%, the heating is stopped, and it is cooled to room temperature under nitrogen. It is a vacuum distillation device, slowly heat up to 220°C, stop heati...

Example Embodiment

[0026] Example 2

[0027] 0.20mol Nadic anhydride, 0.25mol methyl propylene glycol, 0.12mol 2-ethylhexanol, 6.67mL water agent cyclohexane, 0.19g (0.25% of the total mass) tetra titanate were added to a 250mL four-necked flask. N-butyl ester, nitrogen is introduced to protect the reaction system from being oxidized and avoid causing various side reactions, start stirring, slowly heat up, start timing when water comes out, keep the heating rate at 10℃ / h, when the temperature rises to 170 At ℃, the nitrogen flow rate was reduced, and the maximum temperature did not exceed 220℃ to ensure the safety of the experiment. The acid value is measured every 1h, the calculation of the acid value refers to GB / T 1668-2008, the reaction is 6h, the acid value is reduced to 0.31mgKOH / g, the esterification rate is greater than 99%, the heating is stopped, cooled to room temperature under nitrogen, and changed. It is a vacuum distillation device, slowly heat up to 220°C, stop heating when no li...

Example Embodiment

[0028] Example 3

[0029] Into a 250mL four-necked flask were added 0.20mol Nadic anhydride, 0.25mol methyl propylene glycol, 0.12mol 2-ethylhexanol, 6.67mL cyclohexane with water, 0.38g (0.5% of the total mass) tetra titanate N-butyl ester, nitrogen is introduced to protect the reaction system from being oxidized and avoid causing various side reactions, start stirring, slowly heat up, start timing when water comes out, keep the heating rate at 10℃ / h, when the temperature rises to 170 At ℃, the nitrogen flow rate was reduced, and the maximum temperature did not exceed 220℃ to ensure the safety of the experiment. The acid value is measured every 1h, the calculation of the acid value refers to GB / T 1668-2008, the reaction is 6h, the acid value is reduced to 0.40mgKOH / g, the esterification rate is greater than 99%, the heating is stopped, and it is cooled to room temperature under nitrogen. It is a vacuum distillation device, slowly heat up to 220°C, stop heating when no liquid...

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Abstract

The invention relates to a non-toxic environmentally friendly nadic anhydride polyester plasticizer and a preparation method thereof, and relates to the technical field of polyester plasticizers. The non-toxic environmentally friendly nadic anhydride polyester plasticizer comprises nadic acid polymethyl propylene glycol ester, nadic acid poly-1,4-butanediol ester, nadic acid poly-diglycol ester and nadic acid poly-triethylene glycol ester. The preparation method comprises the following steps that: nadic anhydride and diol are subjected to esterification and polycondensation reactions at a temperature of 170 DEG C to 220 DEG C under the conditions that 2-ethylhexanol is used as an end-capping agent, tetra-n-butyl titanate is used as a catalyst and cyclohexane is used as a water-carrying agent; and after the completion of the reactions, excess alcohols and micromolecular esters are removed by reduced pressure distillation to finally obtain a polyester product. The product has an acid value reduced to 0.31-0.53mgKOH . g<-1>, an iodine value of 71.98% - 74.35%, a saponification value of 501.9-593.4mgKOH . g<-1>, viscosity of 801.9-846.5mPa. S, a number average molecular weight of 7052-8612g . mol<-1>, and an esterification rate of 99.68% - 99.81%. The product is non-toxic and environmental friendly, the preparation process is short, the energy consumption is low, 'three wastes' (waste gas, waste water, solid waste) are not generated, and the preparation method meets the green process requirements.

Description

technical field [0001] A non-toxic and environmentally friendly nadic anhydride polyester plasticizer and a preparation method thereof, in particular, relate to an unsaturated polyester with excellent extraction resistance, good migration resistance, good thermal stability, non-toxic and environmental protection It is a kind of plasticizer; its preparation method is that nadic acid anhydride and dihydric alcohol are esterified and polycondensed at a high temperature in the presence of a capping agent and a catalyst to generate a polyester of a certain molecular weight, and the polyester is subjected to vacuum distillation to remove low molecular weight. compound, and finally a polyester plasticizer product with good properties is obtained. The invention relates to the technical field of non-toxic and environmentally friendly polyester plasticizers. Background technique [0002] Plasticizers, ie substances added to materials (plastics, resins or elastomers) to improve their ...

Claims

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Application Information

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IPC IPC(8): C08G63/199C08G63/676C08L27/06C08L67/06
Inventor 蒋平平苗红艳董玉明李成成周永芳
Owner 安徽新鸿药业有限公司
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