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Aromatic hyperbranched polyester for nylon processing and preparation method thereof

A hyperbranched polyester and aromatic technology, applied in the field of aromatic hyperbranched polyester and its preparation, can solve the problem of inability to accurately control the degree of branching of hyperbranched polyester, high cost of solvent DMF recovery, and low thermal decomposition temperature of products, etc. problems, to achieve low cost, reduced flexibility, and high crystallinity

Inactive Publication Date: 2015-04-22
WEIHAI CY DENDRIMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following problems: the reaction time is too long; the purity of the obtained product is too low, and the purification is difficult, and the yield after purification is low; the thermal decomposition temperature of the product without purification is low, and it cannot meet the requirements for use when added to PA6 and PA66; Need to use a large amount of water for washing away DMF completely; The solvent DMF recovery cost used in the reaction is high, increases cost; Synthetic hyperbranched polyester can not accurately control the degree of branching of hyperbranched polyester

Method used

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  • Aromatic hyperbranched polyester for nylon processing and preparation method thereof
  • Aromatic hyperbranched polyester for nylon processing and preparation method thereof
  • Aromatic hyperbranched polyester for nylon processing and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Into a 500 mL three-necked flask preinstalled with a water separator and a spherical condenser, add 45.0 g of pentaerythritol, 128.5 g of dimethyl terephthalate and 0.64 g of zinc acetate, which are uniformly mixed, and heat up to 180°C for 4 hours. After the reaction is finished, cool to room temperature and pulverize to obtain aromatic hyperbranched polyester.

Embodiment 2

[0029] Into a 500mL three-neck flask preinstalled with a water separator and a spherical condenser, add 45.0g of pentaerythritol, 64.3g of dimethyl terephthalate and 0.07g of zinc acetate, which are uniformly mixed, and heat up to 185°C for 6 hours. After the reaction is finished, cool to room temperature and pulverize to obtain aromatic hyperbranched polyester.

Embodiment 3

[0031] Into a 500mL three-neck flask preinstalled with a water separator and a spherical condenser, add 45.0g of pentaerythritol, 257.0g of dimethyl terephthalate and 2.5g of p-toluenesulfonic acid, and heat up to 190°C for 5 hours. After the reaction is finished, cool to room temperature and pulverize to obtain aromatic hyperbranched polyester.

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Abstract

The invention relates to hyperbranched polyester and particularly relates to aromatic hyperbranched polyester for nylon processing and a preparation method thereof. The polyester is prepared from an aromatic monomer and pentaerythritol by adopting a melting process under the effect of a catalyst, wherein the aromatic monomer is dimethyl terephthalate, dimethyl phthalate, dimethyl isophthalate, diethyl terephthalate, diethyl phthalate, diethyl isophthalate, dibutyl terephthalate, dibutyl phthalate or diisobutyl phthalate. The molar ratio of pentaerythritol to aromatic monomer is (1:1)-(1:4). The polyester has the characteristics of high-temperature resistance and high strength; when the polyester is applied to nylon processing, the mechanical properties and processability of nylon can be remarkably improved; and the preparation method provided by the invention is simple and easy to realize.

Description

technical field [0001] The invention relates to a hyperbranched polyester, in particular to an aromatic hyperbranched polyester used for nylon processing and a preparation method thereof. Background technique [0002] Aliphatic polyester has the disadvantages of generally low melting point, high price, and low thermal decomposition temperature. In the processing of PA6 and PA66, it cannot withstand high temperature and decomposes, which cannot meet the requirements of increasing the mechanical properties and processing properties of materials. . [0003] Research and application show that hyperbranched polyester can be used as a blending component to blend with a variety of aliphatic polyesters to improve the processing performance of aliphatic polyesters and improve the performance of products. [0004] In the prior art, the synthesis method of hyperbranched polyester: dimethyl terephthalate (DMT) and pentaerythritol are dissolved in DMF in a certain proportion, zinc aceta...

Claims

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Application Information

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IPC IPC(8): C08G63/127C08G63/78C08L77/00C08L67/00
Inventor 李武松王战涛刘聪聪刘晓东
Owner WEIHAI CY DENDRIMER TECH
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