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Polyimide matting powder and preparation method thereof, polyimide film containing the matting powder and preparation method thereof

A technology of polyimide matting powder and polyamic acid resin, which is applied in the field of polyimide film, can solve the problems of high energy consumption and increased cost of polyimide particles, and achieve low reaction temperature, good mechanical properties and The effect of low electric strength and production cost

Active Publication Date: 2021-03-16
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, this invention requires heating to a temperature above 180°C to precipitate polyimide particles, which consumes a lot of energy; moreover, it needs to irradiate ultrasonic waves, which further increases the cost of preparing polyimide particles

Method used

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  • Polyimide matting powder and preparation method thereof, polyimide film containing the matting powder and preparation method thereof
  • Polyimide matting powder and preparation method thereof, polyimide film containing the matting powder and preparation method thereof
  • Polyimide matting powder and preparation method thereof, polyimide film containing the matting powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add 1350 g of DMAc and 0.460 mol of PDA to a reaction vessel with a capacity of 2000 ml of reflux condensing device, dissolve for 40 minutes, add 0.455 mol of PMDA in batches, react at room temperature for 3 hours, and heat the system during stirring to 100°C, and react for 1 hour to obtain a homogenized polyamic acid resin solution, which is set aside;

[0031] 2) When preparing the above-mentioned resin solution, 0.45 g of graphene with an average particle diameter of 5 nm was dissolved in 50 g of DMAc, and ultrasonically dispersed to obtain a nucleating agent dispersion for subsequent use;

[0032] 3) Add the nucleating agent dispersion liquid obtained in step 2) to the homogenized polyamic acid resin solution obtained in step 1), continue to stir and heat to 150 ° C for 4 hours, and the polyimide particles are precipitated, stop After heating and stirring, after cooling to room temperature, collect the polyimide particles, wash with ethanol, filter, collect the f...

Embodiment 2

[0034] Repeat Example 1, the difference is:

[0035] In steps 1) and 2), the aprotic polar solvent is changed to N-methyl-2-pyrrolidone (NMP);

[0036] Step 2) in, nucleating agent adopts the graphene that average particle diameter is 10nm, and weight is 0.3g;

[0037] In step 3), the reaction temperature is 180° C., and the reaction time is 1 h.

Embodiment 3

[0039] Repeat Example 1, the difference is:

[0040] In step 2), the nucleating agent adopts graphene oxide with an average particle diameter of 10 nm and a weight of 0.6 g.

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Abstract

The invention discloses a polyimide extinction powder and a preparation method thereof, a polyimide film containing the same and a preparation method thereof. The preparation method of the polyimide extinction powder comprises the steps of obtaining a polyamide acid resin solution; after heating the polyamide acid resin solution to 80-100 degrees centigrade to carry out heat preservation reactionon the polyamide acid resin solution for a certain time, adding a nucleating agent dispersion liquid; heating an obtained material to a temperature of less than or equal to 180 degrees centigrade forheat preservation reaction; after reaction is finished, separating out particles; and collecting the particles to obtain the polyimide extinction powder. In the preparation method of the polyimide film, the polyimide extinction powder prepared by using the preparation method of the polyimide extinction powder is used as a delustering agent. By using the preparation method disclosed by the invention to prepare the polyimide extinction powder, ultrasonic equipment does not need to be used in separate-out reaction, the reaction temperature is low, the production cost is low, the particle size ofthe obtained powder is smaller, and the particle size distribution range of the powder is narrow. The black matte polyimide film prepared by using the preparation method disclosed by the invention hasthe advantage that the obtained film realizes a better matte effect and better mechanical performance and electrical strength under conditions of same particle size and same adding quantity.

Description

technical field [0001] The invention relates to a polyimide film, in particular to a polyimide matting powder and a preparation method thereof, a polyimide film containing the matting powder and a preparation method thereof. Background technique [0002] Polyimide film is often used in electronic products. Because the surface of the film is smooth and easy to reflect light, it will cause visual fatigue and discomfort to users when viewed for a long time, especially in black or other colored polyimide films. Because the film Opaque surfaces produce more reflected light. In order to reduce the surface gloss of the film, the existing technology is to add micron or submicron matting agent materials to the polyimide film. [0003] Known matting agent materials can be classified into inorganic matting agents and organic matting agents. Inorganic matting agents include silicon oxide, alumina, calcium carbonate, titanium oxide, etc. Due to the high density of inorganic matting age...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K3/04C08K3/34C08J3/12C08G73/10C08J5/18
CPCC08G73/1003C08G73/1071C08J3/12C08J5/18C08J2379/08C08K3/34C08K3/346C08K2201/003C08K3/042
Inventor 冯羽风姬亚宁青双桂蒋耿杰马纪翔白小庆
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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