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Polyamide composition with improved light-heat aging performance

A polyamide composition and photothermal aging technology, applied in the field of polymer materials, can solve the problems of inability to use light-colored or natural-colored products, reducing effect, difficult distribution of stabilizers, etc.

Active Publication Date: 2014-11-05
江苏晋伦塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the substances disclosed therein have some disadvantages, such as not being able to be applied to light-colored or natural-colored products, and the light and heat protection they provide is still insufficient, especially in the presence of mineral powders
The surface of the mineral powder has an adsorption effect on the stabilizer, which makes it difficult to distribute the stabilizer well and reduces the effect
Although increasing the ratio of stabilizer can overcome the above disadvantages to a certain extent, the effect will still be unstable and have hidden dangers in quality

Method used

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  • Polyamide composition with improved light-heat aging performance
  • Polyamide composition with improved light-heat aging performance
  • Polyamide composition with improved light-heat aging performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3 and comparative example 1

[0099] Add the components of the formula specified in Table 2 from the main feeding port of the extruder, melt and blend at a screw speed of 250-350rpm and a set temperature of 220-260°C, cool, air-dry, pelletize, and mix .

Embodiment 4-6 and comparative example 2-3

[0101] Add the ingredients specified in Table 2 from the main feeding port of the extruder except the chopped E-glass fiber, and add the chopped E-glass fiber from the side feeding port at 250-350rpm screw speed and 220-260℃ Melting and blending at a set temperature, cooling, air-drying, pelletizing, and mixing.

[0102] The obtained example and comparative example particles were dried at a temperature of 80°C-100°C for 4 hours to ensure that the moisture content of the particles was lower than 0.15%, and then the samples were prepared.

[0103]The injection molded samples were prepared according to the ASTM D4066 standard, the melt temperature was set at 290°C, and the mold temperature was set at 80°C.

[0104] The long-term photothermal aging resistance is carried out according to ASTM G154 Cycle 1, the conditions are: the wavelength of ultraviolet light is 340nm, the irradiation intensity is 0.89W (m2-nm), and the irradiation cycle is 8 hours of ultraviolet irradiation / bl...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a polyamide composition with improved light-heat aging performance. The polyamide composition includes the following raw materials by mass: 40-85% of polyamide resin, 1-8% of UV masterbatches, 0.5-5% of a composition containing a silicon functional group and silicon dioxide, 0.2-1% of an antioxidant, 10-50% of an inorganic filler, and 0-5% of a pigment. The polyamide composition with improved light-heat aging performance provided by the invention can be applied in products with rich colors and demanding requirements for light-heat aging resistance. The prepared polyamide composition has stable performance and excellent long-term light-heat aging resistance, and the preparation method is simple and mature, thus being conducive to general popularization and application.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide composition for improving photothermal aging performance. Background technique [0002] Polyamide (Polyamide) has good mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, and is easy to process, so polyamide materials are widely used in automobiles, machinery, motors, electronic appliances and other fields. When polyamide is used in outdoor products for a long time, the surface of polyamide material will change color or even pulverize, resulting in the appearance of the product no longer beautiful, and the mechanical properties will be greatly reduced. In the environment of light), heat and oxygen, the material automatically oxidizes to generate peroxy radicals, and the peroxy radicals undergo a hydrogen abstraction reaction with the polyamide molecular chain and a series of chain scission reactions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L83/07C08K3/36C08K7/14C08K5/3492C08K5/3435C08K5/3475C08J3/22
CPCC08J3/226C08J2377/02C08J2377/06C08J2477/02C08L77/02C08L77/06C08L2201/08C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L83/04C08K13/02C08K3/36C08K5/098C08K5/20C08K13/04C08K7/14C08L23/06
Inventor 陈跃民钟春重张振文陈原振林柏龄
Owner 江苏晋伦塑料科技有限公司
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