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Modified polyimide amorphous material

A polyimide and non-crystalline technology, applied in the field of modified polyimide non-crystalline materials, can solve the problems of low performance of modified polyimide non-crystalline materials, improve anti-oxidation performance, Improves UV absorption strength, good flexibility and impact resistance

Pending Publication Date: 2021-11-19
SHENZHEN DOERN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a modified polyimide amorphous material, which solves the problem of low performance of the existing modified polyimide amorphous material by adding ultraviolet light absorbers and antioxidants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention is a modified polyimide non-crystalline material. The raw materials are composed of 70% of thermoplastic polyimide, 20% of aramid fiber, 0.3% of ultraviolet absorber, and 0.7% of antioxidant in terms of mass percentage. % and lubricant 9%, adopt high temperature to mix said thermoplastic polyimide, aramid fiber, ultraviolet light absorber, antioxidant and lubricant according to weight percentage through internal mixer, add the uniformly mixed material into the hopper of a twin-screw extruder, melted and blended, extruded and granulated to obtain a modified polyimide non-crystalline material.

[0023] Further, the molecular weight of the aramid fiber is 300,000-500,000.

[0024] Further, the ultraviolet absorber is specifically UV-531.

[0025] Further, the antioxidant is specifically antioxidant 1010.

[0026] Further, the lubricant is specifically polytetrafluoroethylene.

[0027] Further, the processing conditions of the twin-screw extruder are as fol...

Embodiment 2

[0029] The invention is a modified polyimide non-crystalline material. The raw materials are composed of: 75% of thermoplastic polyimide, 15% of aramid fiber, ultraviolet light Absorbent 0.3%, antioxidant 0.7% and lubricant 9%, adopt high temperature to pass described thermoplastic polyimide, aramid fiber, ultraviolet absorber, antioxidant and lubricant by weight percentage Mixing is carried out, and the uniformly mixed material is added into a hopper of a twin-screw extruder, melted and blended, extruded and granulated to obtain a modified polyimide non-crystalline material.

[0030] Further, the molecular weight of the aramid fiber is 300,000-500,000.

[0031] Further, the ultraviolet absorber is specifically UV-531.

[0032] Further, the antioxidant is specifically antioxidant 1010.

[0033] Further, the lubricant is specifically polytetrafluoroethylene.

[0034] Further, the processing conditions of the twin-screw extruder are as follows: the temperature of the first zo...

Embodiment 3

[0036] The invention is a modified polyimide non-crystalline material. The raw material is composed of: 80% of thermoplastic polyimide, 15% of aramid fiber, ultraviolet light Absorbent 0.35%, antioxidant 0.65% and lubricant 4%, adopt high temperature to pass described thermoplastic polyimide, aramid fiber, ultraviolet absorber, antioxidant and lubricant by weight percentage Mixing is carried out, and the uniformly mixed material is added into a hopper of a twin-screw extruder, melted and blended, extruded and granulated to obtain a modified polyimide non-crystalline material.

[0037] Further, the molecular weight of the aramid fiber is 300,000-500,000.

[0038] Further, the ultraviolet absorber is specifically UV-531.

[0039] Further, the antioxidant is specifically antioxidant 1010.

[0040] Further, the lubricant is specifically polytetrafluoroethylene.

[0041] Further, the processing conditions of the twin-screw extruder are as follows: the temperature of the first zo...

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Abstract

The invention discloses a modified polyimide amorphous material, and relates to the technical field of modified polyimide amorphous material processing. The modified polyimide amorphous material is composed of the raw materials in percentage by mass: 60 to 89 percent of thermoplastic polyimide, 10 to 30 percent of aramid fibers, 0.1 to 0.4 percent of an ultraviolet absorbent, 0.5 to 1 percent of an antioxidant and 1 to 10 percent of a lubricant. The thermoplastic polyimide, the aramid fibers, the ultraviolet light absorber, the antioxidant and the lubricant are mixed according to the weight percentage through an internal mixer at high temperature, and the uniformly mixed materials are added into a hopper of a double-screw extruder. By using the thermoplastic polyimide, the modified polyimide amorphous material disclosed by the invention can have good high temperature resistance, wear resistance and dimensional stability, and by designing the aramid fibers, the modified polyimide amorphous material disclosed by the invention can have good flexibility and impact resistance.

Description

technical field [0001] The invention belongs to the technical field of modified polyimide amorphous material processing, in particular to a modified polyimide amorphous material. Background technique [0002] Polyimide is one of the organic polymer materials with the best comprehensive performance. Its high temperature resistance is above 400°C, the long-term use temperature range is -200~300°C, some parts have no obvious melting point, high insulation performance, the dielectric constant is 4.0 at 103 Hz, and the dielectric loss is only 0.004~0.007. It belongs to F to H class insulation. According to the chemical structure of the repeating unit, polyimide can be divided into three types: aliphatic, semi-aromatic and aromatic polyimide. According to the interaction force between chains, it can be divided into cross-linked type and non-cross-linked type. Polyimide refers to a class of polymers containing imide rings (-CO-N-CO-) on the main chain, among which polymers contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L77/10C08L27/18C08K5/132C08K5/134
CPCC08L79/08C08L2201/08C08L2205/16C08L2205/03C08L77/10C08L27/18C08K5/132C08K5/1345
Inventor 张恩来赵一静刘乐华刘燕赵宁
Owner SHENZHEN DOERN CHEM