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Application of chain extender in improving viscosity of polyester compound, modified polyester compound and preparation method of modified polyester compound

A technology of chain extenders and compounds, which is applied in the application of chain extenders in increasing the viscosity of polyester compounds, modified polyester compounds and their preparation, and can solve the problems of low economic benefit and high energy consumption

Pending Publication Date: 2021-04-30
新疆蓝山屯河高端新材料工程技术研究中心(有限公司) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic TPEE market is still growing, but at present, there is a great demand for TPEE with different melt indices in China, which can only be realized through the polymerization process, and it also faces the same situation as PBT, with the disadvantages of high energy consumption and low economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026]The present invention also provides a method of preparing a modified polyester compound comprising the steps of:

[0027]The polyester compound, chain extender, antioxidant aid, a nucleating agent, a cooling agent, and a dispersing agent are mixed for the chain-chain reaction, the chain extender being a hydroxyl plus-forming chain extender and / or carboxy-forming expansion. Chain agent.

[0028]In the present invention, the mass of the chain extender is preferably from 0.5 to 1.2%, more preferably 0.8 to 1.0% of the mass of the polyester compound. In the present invention, the type of the chain extender is preferably consistent with the above scheme, and details are not described herein again.

[0029]In the present invention, when the chain extender is preferably a mixture of a hydroxyl group-forming chain extender and a carboxyl group-shaped chain extender, the mass ratio of the hydroxyl plus-forming chain extender and the carboxy-forming chain extender It is preferably from 1: 1 to...

Embodiment 1

[0042]Raw material: The chain extender is a mixture of styrene methacrylate and a mixture of a monommethylene molecular weight of 10000) and hexamethylene diisocyanate. The styrene methacrylate and the hexamethyl methacrylate The mass content of diisocyanates is 50% and 50%, respectively, and the amount of the chain extender is 0.8%; the polyester compound PBT; the antioxidant is an antioxidant 1010 is used as a polyester compound mass of 0.5 %; The amount of smooth skating agent (alkacamide) is 0.3% of the mass of the polyester compound; the nucleating agent (substituted arylamide organic compound), 0.2% of the mass of the polyester compound; dispersant citrate tributyl The amount is 0.5% of the mass of the polyester compound; the amount of white oil is used as 0.2% of the mass of the polyester compound, and the mass of tributyl citrate in the white oil is 0.70%.

[0043]Polyester compounds, white oil, chain extenders, nucleating agents, antioxidants, cubicants, and dispersants are se...

Embodiment 2

[0046]As in Example 1, the difference is only that the polyester compound is TPEE, the temperature of the chain-chain reaction is 200 ° C, the screw extruder is 120 r / min, and the extrusion rate of the screw extruder is 80 kg / h.

[0047]Experimental results: The carboxyl group of TPEE is reduced from 13 mmol / kg to 5.01 mmol / kg, and the melted index is reduced from 30 g / 10min to 2.5 g / 10 min, and the tensile strength is raised from 35 MPa to 40 MPa, and the elongation is increased from 590% to 630%. HDT is increased from 73 ° C to 78 ° C. The exposed rear chain growth allows the product tensile strength to increase, and the elasticity increases. The increase in elasticity makes the screw extrusion more smoothly, and the unit time extrusion speed is more accelerated, 80 m / min.

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Abstract

The invention provides an application of a chain extender in improving the viscosity of a polyester compound, a modified polyester compound and a preparation method of the modified polyester compound, and belongs to the field of polyester processing. The invention provides an application of a chain extender in improving the viscosity of polyester compounds. The chain extender is a hydroxyl addition type chain extender and / or a carboxyl addition type chain extender. The chain extender is a hydroxyl addition type chain extender and / or a carboxyl addition type chain extender, and can be subjected to chain extension reaction with terminal hydroxyl or carboxyl of PBT or TPEE, so that the molecular chain of the polyester compound can be prolonged, and the molecular weight can be obviously improved, thereby enhancing the intrinsic viscosity of the polyester compound, lowering the melt index and enhancing the processability of the polyester compound. The defects of high equipment requirement, high energy consumption and low economic benefit of a traditional method such as a solid-phase tackifying technology are avoided, and the method has the advantages of short time consumption, high efficiency and good economic benefit.

Description

Technical field[0001]The present invention relates to the field of polyester processing techniques, and more particularly to the application, modified polyester compound and preparation method thereof in increasing the viscosity of the polyester compound.Background technique[0002]PBT (polyethylene terephthalate) belongs to one of five major engineering plastics, which is greatly used worldwide, but as the current domestic PBT manufacturer is increasing, domestic PBT production capacity is facing serious excess . Production of high viscosity PBT conventional methods such as solid phase intensive techniques face the shortcomings of high equipment requirements, large energy consumption and low economic efficiency.[0003]TPEE (thermoplastic polyester elastomer, block copolymer containing polyester hard segments and polyether soft segments) belongs to thermoplastic elastomers, as a PBT polyether segment block, and the performance is similar to PBT but is completely Different, TPEE has bec...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G81/02C08L67/02C08L91/06C08K5/134C08K5/20C08K5/11C08K5/00
CPCC08G63/916C08G63/91C08G81/027C08L67/02C08L67/00C08L91/06C08K5/1345C08K5/20C08K5/11C08K5/00
Inventor 陈汐丁建萍哈斯特尔兰光明田晓燕
Owner 新疆蓝山屯河高端新材料工程技术研究中心(有限公司)
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