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A kind of anti-aging polyester modified material

A polyester modification and anti-aging technology, applied in the field of polyester modified materials, can solve the problems of harmful irritating odor of human body, increase of product yellowness index, poor thermal stability, etc., and achieve other ideal properties, elongation at break, etc. The effect of high retention rate and excellent hydrolysis resistance

Active Publication Date: 2015-11-18
浙江华创光电材料有限公司
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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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  • A kind of anti-aging polyester modified material
  • A kind of anti-aging polyester modified material
  • A kind of anti-aging polyester modified material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0036] The components of the modified polyester in this example 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.), monomethoxypolyethylene glycol-capped poly4,4'-diphenylmethanecarbodiimide (expressed as MPEG-PMCDI), 0.5% triphosphate Methyl ester and 0.5% antioxidant 1010 were added into the mixer and mixed evenly, and then passed through the twin-screw extruder to make a 250 μm biaxially stretched film through the above-mentioned preparation process, and its carboxyl terminal concentration, yellowness index and aging resistance were tested. (The PET resin used in this example has an intrinsic viscosity of 0.67dl / g, a concentration of terminal carboxyl groups of 25eq / t, and a molecular weight of 18000-23000). When a large amount of diaminopolyethylene glycol is used, the melt viscosity is likely to increase due to the effect of the difunctional group, which brings...

Embodiment 6～8

[0044] The components of the modified polyester in this example are as follows: PET resin (after vacuum drying at 150°C), and amino polyethylene glycol monomethyl ether (MPEG-NH 2 , purchased by Xiamen Sinobanger Biotechnology Co., Ltd.), monomethoxypolyethylene glycol-capped poly4,4'-diphenylmethanecarbodiimide (expressed as MPEG-PMCDI), 0.5% triphosphate Methyl ester and 0.5% antioxidant 1010 (purchased by BASF) were added into the mixer and mixed evenly, and then passed through a twin-screw extruder to make a 250 μm biaxially stretched film, and its carboxyl terminal concentration, yellowness index and aging resistance were tested. Performance (the PET resin used in this example has an intrinsic viscosity of 0.67dl / g, a concentration of terminal carboxyl groups of 25eq / t, and a molecular weight of 18000-23000). Using amino polyethylene glycol monomethyl ether (MPEG-NH 2 ) modifier, due to the effect of a single functional group, the amount of addition should be increased, ...

Embodiment 9～12

[0052] The components of the modified polyester in this example are as follows: PET resin (after vacuum drying at 150°C), and diglycidyl polyethylene glycol (EO-PEG-EO, Xiamen Sinobanger Biotechnology Co., Ltd. purchased), monomethoxypolyethylene glycol-blocked polyisophorone carbodiimide (expressed as MPEG-PIPDI), 0.5% trimethyl phosphate and 0.5% antioxidant 1010 (purchased from BASF) were added After mixing by the mixer, a 250 μm biaxially stretched film was made through a twin-screw extruder, and its terminal carboxyl group concentration, yellowness index and aging resistance were tested (the intrinsic viscosity of the PET resin used in this example was 0.67dl / g, the concentration of terminal carboxyl groups is 25eq / t, and the molecular weight is 18000-23000). Processability, hydrolysis resistance The performance is relatively good, and the yellowness index is slightly higher, but when the added amount is too high, the processing performance becomes poor, and the results...

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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, moldings 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 polyester chain segments under high temperature and high humidity conditions and cannot fully maintain the physical properties of the material. Hydrolysis by catalysis, because the terminal carboxyl group of polyester is sensitive to moisture greatly limits the industrial application of polyester. Therefore, in order to expand its application field, it is necessary to seek to improve the performance of the above problems. [0003] The hydrolytic degradation of polyester ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L71/08C08L79/00
Inventor 逯德木周光大林建华
Owner 浙江华创光电材料有限公司
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