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Ageing resistant polyester modified material

A polyester modification and anti-aging technology, applied in the field of polyester modified materials, can solve problems such as poor thermal stability, increased yellowness index of products, harmful and irritating odor of human body, etc., and achieve good hydrolysis resistance, elongation at break, etc. High long-term retention rate, ideal effect of other properties

Active Publication Date: 2013-12-25
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has some important disadvantages. First of all, it usually increases the melt viscosity of polyester, which makes it difficult to fill parts in the injection molding process, easily produces a pungent odor harmful to the human body, poor thermal stability, and yellowish color of the product. The degree index will also increase, and in addition, there will be problems of migration and exudation during subsequent processing and use.

Method used

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  • Ageing resistant polyester modified material
  • Ageing resistant polyester modified material
  • Ageing resistant polyester modified material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0036] The components of the modified polyester in this embodiment are as follows: PET resin (after vacuum drying at 150°C), and diaminopolyethylene glycol (H 2 N-PEG-NH 2 , Purchased by Xiamen Sinobanger Biotechnology Co., Ltd.), monomethoxy polyethylene glycol terminated poly4,4'-diphenylmethylcarbodiimide (expressed in MPEG-PMCDI), 0.5% triphosphate Methyl ester and 0.5% antioxidant 1010 were added to the blender and mixed, and then passed through the twin-screw extruder through the above-mentioned preparation process to make a 250μm biaxially oriented film, and tested its terminal carboxyl group concentration, yellowness index and aging resistance (The intrinsic viscosity of the PET resin used in this example is 0.67dl / g, the terminal carboxyl group concentration is 25eq / t, and the molecular weight is 18000-23000). When bisaminopolyethylene glycol is used in a large amount, the melt viscosity is likely to increase more due to the effect of the bifunctional group, which bring...

Embodiment 6～8

[0044] The components of the modified polyester in this embodiment are as follows: PET resin (after being vacuum dried at 150°C), and amino polyethylene glycol monomethyl ether (MPEG-NH 2 , Purchased by Xiamen Sinobanger Biotechnology Co., Ltd.), monomethoxy polyethylene glycol terminated poly4,4'-diphenylmethylcarbodiimide (expressed in MPEG-PMCDI), 0.5% triphosphate Methyl ester and 0.5% antioxidant 1010 (purchased by BASF) were added to the mixer and mixed, and then passed through a twin-screw extruder to make a 250μm biaxially oriented film, and tested its terminal carboxyl group concentration, yellowness index and aging resistance Performance (the intrinsic viscosity of the PET resin used in this example is 0.67dl / g, the terminal carboxyl group concentration is 25eq / t, and the molecular weight is 18000-23000). Using amino polyethylene glycol monomethyl ether (MPEG-NH 2 ) In the case of modifiers, due to the effect of monofunctional groups, the dosage will be increased, and ...

Embodiment 9～12

[0052] The components of the modified polyester in this embodiment are as follows: PET resin (after being vacuum dried at 150°C), and diglycidyl polyethylene glycol (EO-PEG-EO, Xiamen Sinobanger Biotechnology Co., Ltd.) Purchase), monomethoxy polyethylene glycol terminated polyisophorone carbodiimide (expressed in MPEG-PIPDI), 0.5% trimethyl phosphate and 0.5% antioxidant 1010 (purchased from BASF) added After mixing by the blender, a biaxially oriented film of 250μm is made through a twin-screw extruder, and its end carboxyl group concentration, yellowness index and aging resistance are tested (the intrinsic viscosity of the PET resin used in this example is 0.67dl / g, the terminal carboxyl group concentration is 25eq / t, and the molecular weight is 18000-23000). When using diglycidyl polyethylene glycol (EO-PEG-EO) and monomethoxy polyethylene glycol terminated polyisophorone carbodiimide as modifiers, the processing performance and hydrolysis resistance of polyester The perf...

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Abstract

The invention provides an ageing resistant polyester modified material. The ageing resistant polyester modified material is prepared from the following raw materials by mass percentage: 80%-99.7% of polyester, 0.1%-10% of end group functionalized polyethylene glycol, 0.1%-5% of mono alkoxy polyethylene glycol or polypropylene glycol modified poly carbodiimide, and 0.1%-5% of additive. Compared with the prior art, the polyester modified material prepared by the method or the finished product prepared by the polyester modified material has better hydrolysis resistance, before the ageing resistant test of the polyester material, the content of the terminal carboxyl is 0-20eq / t, after ageing resistant treatment, the breaking elongation retention of the polyester is still high, and other properties of the polyester are ideal; no gas harmful to human health is generated in the production process, the viscosity of the melt is not increased so as not to cause difficulty in process, and no low molecular weight material is found to migrate and exude when the product is used.

Description

(1) Technical field [0001] The invention relates to an aging-resistant polyester modified material, which belongs to the technical field of polymer materials. (2) Background technology [0002] Polyester resins are widely used in monofilaments, fibers, films, molded products and containers due to their excellent chemical stability, solvent resistance, abrasion resistance, gloss, gas barrier properties and electrical insulation properties. However, most polyester materials are prone to hydrolysis and degradation of the polyester segment under high temperature and high humidity conditions and cannot fully maintain the physical properties of the material. This is mainly due to the fact that under such conditions, the polyester is extremely vulnerable to its residual terminal carboxyl groups. Catalyzed hydrolysis, due to the moisture-sensitive characteristics of the polyester terminal carboxyl group greatly limits the industrial application of polyester, therefore, in order to expand...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L71/08C08L79/00
Inventor 逯德木周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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