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Heat-resistant engineering plastic and preparation method thereof

An engineering plastic and heat-resistant technology, which is applied in the field of heat-resistant engineering plastic and its preparation, can solve problems such as insufficient strength and poor heat resistance

Pending Publication Date: 2021-09-14
许进华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing engineering plastics in my country have the disadvantages of poor heat resistance and insufficient strength.

Method used

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  • Heat-resistant engineering plastic and preparation method thereof

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preparation example Construction

[0043] In the second aspect of the present invention, the engineering plastics produced by a method for preparing heat-resistant engineering plastics mainly include the following raw materials in parts by weight: 70-140 parts of N-methylpyrrolidone, 20-40 parts of xylene, 10-20 parts N-N dimethylacetamide, 30-60 parts of N-N dimethylformamide, 40-60 parts of self-made lubricant, 40-60 parts of titanium dioxide.

[0044] Preferably, the self-made lubricant is prepared by alkali treatment of titanium dioxide.

Embodiment 1

[0045] Embodiment 1: heat-resistant engineering plastics one:

[0046] A heat-resistant engineering plastic, mainly comprising:

[0047] 70 parts of N-methylpyrrolidone, 20 parts of xylene, 10 parts of N-N dimethylacetamide, 30 parts of N-N dimethylformamide, 40 parts of self-made lubricant, 40 parts of titanium dioxide.

[0048] The preparation method of this engineering plastics is as follows:

[0049](1) Mix N-methylpyrrolidone, xylene, N-N dimethylacetamide, and N-N dimethylformamide in a volume ratio of 7:2:1:3, and stir at 90°C for 3 hours to obtain polyamide acid solution;

[0050] (2) Divide the polyamic acid solution into two parts with equal volumes, one part is wet-spun, the polyamic acid solution passes through the spinning hole, the coagulation bath, and after natural coagulation, the polyamic acid solution is dried, wound and screened to obtain the polyamic acid solution. Amic acid primary staple fiber, the diameter of the silk hole during wet spinning is 1.2m...

Embodiment 2

[0056] Embodiment 2: heat-resistant engineering plastics 2:

[0057] A heat-resistant engineering plastic, mainly comprising:

[0058] 140 parts of N-methylpyrrolidone, 40 parts of xylene, 20 parts of N-N dimethylacetamide, 60 parts of N-N dimethylformamide, 80 parts of self-made lubricant, 80 parts of titanium dioxide.

[0059] The preparation method of this engineering plastics is as follows:

[0060] (1) Mix N-methylpyrrolidone, xylene, N-N dimethylacetamide, and N-N dimethylformamide in a volume ratio of 7:2:1:3, and stir at 120°C for 5 hours to obtain polyamide acid solution;

[0061] (2) Divide the polyamic acid solution into two parts with equal volumes, one part is wet-spun, the polyamic acid solution passes through the spinning hole, the coagulation bath, and after natural coagulation, the polyamic acid solution is dried, wound and screened to obtain the polyamic acid solution. Amic acid primary staple fiber, the diameter of the hole during wet spinning is 2.2mm, t...

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Abstract

The invention discloses heat-resistant engineering plastic and a preparation method thereof. The preparation method comprises the steps of preparing polyamide acid primary short fibers by wet spinning, adding the polyamide acid primary short fibers adsorbing a self-made lubricant into viscous polyimide, carrying out imidization reaction after adding the polyamide acid primary short fibers, and converting the primary short fibers into polyimide fibers, so that the toughness and the strength of the polyimide fibers. During cooling and curing, a method of firstly rapidly heating and then slowly cooling is adopted, so that the retention time of polyimide in a crystallization region can be prolonged, the crystallinity is increased, and the heat resistance is further improved; and titanium dioxide subjected to alkali treatment is a self-made lubricating agent, water molecules generated in the imidization process are removed, and preparation of the engineering plastic is guaranteed.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a heat-resistant engineering plastic and a preparation method thereof. Background technique [0002] Engineering plastics refer to industrial plastics used as industrial parts or casing materials, and are plastics with excellent strength, impact resistance, heat resistance, hardness and aging resistance. Engineering plastics are widely used in electronics, construction, automobiles, office equipment, machinery, aerospace and other industries. It has become an international trend to replace steel and wood with plastic. With the rapid development of my country's automobile, electronics and construction industries, my country has become the country with the fastest growing demand for engineering plastics in the world. However, the existing engineering plastics in my country have the disadvantages of poor heat resistance and insufficient strength. Therefore, it is very promising to stu...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K3/22C08K9/02
CPCC08L79/08C08L2201/08C08K2003/2241C08L2205/16C08K3/22C08K9/02
Inventor 许进华
Owner 许进华
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