Polyester elastomer for blow molding and preparation method thereof

A polyester elastomer and elastomer technology, applied in the field of polyester elastomers, can solve the problems of poor rheology and difficult processing, and achieve the effects of good appearance quality, easy processing, and changing the degree of softness and hardness.

Active Publication Date: 2014-03-19
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor rheological properties or difficult processing in the prior art, and provide a blown blower with high melt strength, good crystallization performance, better product appearance quality, excellent heat resistance and mechanical properties. Plastic Polyester Elastomer

Method used

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  • Polyester elastomer for blow molding and preparation method thereof
  • Polyester elastomer for blow molding and preparation method thereof
  • Polyester elastomer for blow molding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 30g DMT, 25g BDO and 25g PTMEG (Mn=1000), 0.25g polyether diol containing aromatic ring (where R1=R2=H, a=b=1), and add 20mg tetratitanate Butyl ester and 10mg antioxidant 1010, heat up at 170-180°C under normal pressure for transesterification reaction, remove by-product methanol, generate mixed glycol terephthalate and its oligomers, the amount of methanol to be left is When the theoretical amount is 95%, the transesterification reaction is ended; after the transesterification reaction product is pressed, it is transferred to a high vacuum (100-200Pa) stage for co-polycondensation reaction, and the temperature rises to 230-250°C, and the polycondensation is controlled by the stirring power value At the end of the reaction, nitrogen gas was filled, and the vacuum was eliminated to obtain polyester elastomer; the intrinsic viscosity of the polyester elastomer was 1.2 dL / g, and the obtained 50g polyester elastomer, 2g polyester liquid crystal macromolecular compound, ...

Embodiment 2

[0054] Add 50g DMT, 40g BDO and 56g PTMEG (Mn=1000), 2.5g polyether diol containing aromatic ring (wherein R1=H, R2=CH 3 , a=b=1) At the same time, add 50mg tetrabutyl titanate and 40mg antioxidant 1010, raise the temperature at 160-180°C to carry out transesterification reaction under normal pressure, remove the by-product methanol, and generate terephthalic acid mixed glycol Esters and their oligomers, when the amount of methanol remaining is 95% of the theoretical amount, the transesterification reaction is ended; after the product of the transesterification reaction is pressed, it is transferred to a high vacuum (100-200Pa) stage for co-condensation reaction, the temperature Rise to 230-250°C, control the end point of the polycondensation reaction by the numerical value of the stirring power, fill with nitrogen, and eliminate the vacuum to obtain a polyester elastomer; the intrinsic viscosity of the polyester elastomer is 0.82dL / g, and the obtained 50g polyester elastomer ...

Embodiment 3

[0056] In the flask, add 35g DMT, 20g BDO and 48g PTMEG (Mn=2000), 3g polyether glycol containing aromatic ring (wherein R1=H, R2=CH 3 , a=b=1), add 50mg tetrabutyl titanate and 15mg antioxidant 1010 at the same time, carry out the transesterification reaction under normal pressure at 170-180°C, remove the by-product methanol, and generate terephthalic acid Alcohol esters and its oligomers, when the amount of methanol left over is 95% of the theoretical amount, the transesterification reaction is terminated; after the product of the transesterification reaction is pressed, it is transferred to a high vacuum (60Pa) stage for co-condensation reaction, and the temperature rises to 230-250°C, control the end point of the polycondensation reaction by the numerical value of the stirring power, fill with nitrogen, and eliminate the vacuum to obtain a polyester elastomer; the intrinsic viscosity of the polyester elastomer is 1.5dL / g, and the obtained 50g polyester elastomer, Add 4g of...

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Abstract

The invention discloses a polyester elastomer for blow molding and preparation method thereof, and the polyester elastomer comprises the following components by weight percent: 88.0-96.9% of thermoplastic polyester elastomer, 3.0-10.0% of polyester liquid crystal macromolecular compounds, and 0.1-2.0% of isocyanurate compounds. The preparation method comprises the following steps: obtaining thermoplastic polyester elastomers by esterification reaction or transesterification reaction and condensation polymerization; adding polyester liquid crystal macromolecular compound and isocyanurate compound for reaction; obtaining the product. According to the invention, thermoplastic polyester elastomers are added with polyester liquid crystal macromolecular compounds and isocyanurate compounds, and the melt index of the obtained polyester elastomer for blow molding is between 0.5-1.5, and the product has higher melt-strength with good appearance quality, easier processing process and excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of polyester elastomers, in particular to a polyester elastomer for blow molding and a preparation method thereof. Background technique [0002] Polyester thermoplastic elastomer has the characteristics of both rubber and thermoplastic engineering plastics. It exhibits the characteristics of rubber at room temperature and the characteristics of thermoplastics at high temperature. It can be plasticized and molded, and it is easy to process. Its molecular structure consists of hard segment and soft segment. The hard segment is aromatic polyester (PET or PBT), and the soft segment is polyether or polyester block with a lower glass transition temperature. The rigidity, polarity and crystallinity of the hard segment make it have good high temperature performance and oil and solvent resistance, and the low glass transition temperature and saturation of the soft segment polyether make it have excellent low temperature perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/78C08G63/91C08G81/00B29C49/00
Inventor 苑仁旭徐依斌李建军蔡彤旻焦建赵巍曾祥斌
Owner KINGFA SCI & TECH CO LTD
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