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Preparation method and application of phthalic acid diester (2-propyl group heptanol)

A technology of phthalic acid di- and phthalic anhydride is applied in the field of preparation of phthalic acid diesters and achieves the effects of good compatibility, good thermal aging performance and good anti-fogging performance

Inactive Publication Date: 2012-07-04
CHAOHU XIANGFENG PLASTIC AIDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the potential carcinogenicity of phthalate plasticizers, their use has been strictly controlled abroad.

Method used

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  • Preparation method and application of phthalic acid diester (2-propyl group heptanol)
  • Preparation method and application of phthalic acid diester (2-propyl group heptanol)
  • Preparation method and application of phthalic acid diester (2-propyl group heptanol)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] at 25M 3 Put phthalic anhydride and 2-propylheptanol into the stainless steel reaction kettle. When feeding, the molar ratio of phthalic anhydride to 2-propylheptanol is 1:2.6. Stir and heat up. When the temperature rises to 130°C, stir at constant temperature for 50 minutes and continue to heat up. After reaching 180°C, add catalyst titanate, continue to react at 210°C for 5 hours, remove alcohol under reduced pressure, neutralize, separate the water phase and refine to obtain the product.

Embodiment 2

[0024] at 25M 3 Put phthalic anhydride and 2-propylheptanol into the stainless steel reaction kettle. When feeding, the molar ratio of phthalic anhydride to 2-propylheptanol is 1:3. Stir and heat up. When the temperature rises to 130°C, stir at constant temperature for 50 minutes and continue to heat up. To 180°C, add catalyst titanate, continue to react at 180°C-210°C for 3 hours, remove alcohol under reduced pressure, neutralize with 5% sodium hydroxide solution, without washing with water, and dehydrate under reduced pressure to obtain the product.

[0025] The obtained product quality index and the energy consumption index required for production are as follows:

[0026] Table 1 DPHP quality indicators

[0027] Indicator name Index value color, APHA ≤10 Acid value, mg KOH / g ≤0.02 Moisture, % ≤0.02 Viscosity, mPas ≤125 Specific gravity (20℃), g / cm3 0.962±0.003 Refractive index(25℃) 1.484±0.003 Ester content, ...

Embodiment 3

[0035] Combined with the excellent performance of the DPHP of the present invention, it is applied to UL wire and cable, and experiments are carried out at 60°C, 75°C, 80°C, and 90°C respectively, and the data obtained are as follows in Table 4:

[0036] Table 4 Specific application of DPHP in UL wire and cable

[0037] UL level number of days temperature(℃) 60 7 100 75 10 100 80 7 114 90 7 122

[0038] *UL: Underwriter Laboratories (US)

[0039]

[0040] Conclusion: 1. 60°C, 75°C

[0041] Interchangeable with DIDP in all insulation and jacket formulations using DIDP (UL Recognized)

[0042] 2. 80°C, 90°C

[0043] Can be mixed with other plasticizers, such as TOTM, etc.

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Abstract

The invention provides a preparation method and application of phthalic acid diester (2-propyl group heptanol), which obtain the phthalic acid diester (2-propyl group heptanol) (DPHP) through a one-step reaction with phthalic anhydride and the 2-propyl group heptanol serving as raw materials. The raw materials selected by in the preparation method and the application are easy to obtain and mild in reaction condition, the postprocessing after reaction is simple, operation is simple and convenient, chemical yield coefficient is high and the like. The preparation method is convenient in operation, saves energy, and is less in environmental contamination. Obtained products have low volatility, good thermal ageing performance, good weather fastness and good anti-mobility, and can serve as a plasticizer in the polrvinyl chloride processing process.

Description

technical field [0001] The invention belongs to the field of fine chemical synthesis, and in particular relates to a preparation method and application of bis(2-propylheptyl) phthalate. Background technique [0002] As one of the main products of the plastics industry, polyvinyl chloride (PVC) has been widely used in more and more fields. Polyvinyl chloride needs to use a large amount of plasticizers in the process of processing, and the plasticizers currently used are mainly phthalates. The mechanism of action of the plasticizer is to insert the molecules of the polar plasticizer into the middle of the molecular chain of the PVC resin to increase the distance between the molecules, and the polar part of the PVC molecular chain interacts with the polar part of the plasticizer to reduce the melting Increase the body viscosity and increase the flexibility of the molecular chain. Even when the PVC plasticizer system is cooled, the plasticizer remains in the original position, ...

Claims

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Application Information

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IPC IPC(8): C07C69/80C07C67/08C08K5/12C08L27/06
Inventor 潘学松
Owner CHAOHU XIANGFENG PLASTIC AIDS
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