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Preparation method of printable black polyimide film

A technology of polyimide and polyamic acid is applied in the field of preparation of printable polyimide black film, which can solve the problems of difficult adhesion and printing, and achieve easy printing, increase surface tension and good surface adhesion. Effect

Inactive Publication Date: 2011-10-19
SUZHOU ANJIE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For above-mentioned technical problem that exists, the object of the present invention is: propose a kind of under the condition of not sacrificing polyimide thin film heat performance and electrical performance, add highly active nano-calcium carbonate particle and nanoscale carbon black particle, A method for preparing a printable polyimide black film that solves the problems of difficult adhesion and printing of ordinary PI films

Method used

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specific Embodiment approach 1

[0013] Specific implementation mode one: as attached figure 1 The preparation method of the printable polyimide black film of shown molecular formula comprises the following steps:

[0014] 1. Use aromatic diamine and aromatic dianhydride to react with DMF in a polar solvent. The solid content in the solvent is 5%-40%. Under the protection of nitrogen, the reaction temperature is 20-100°C, and the reaction time is 2-2. After 10 hours, the molar ratio of the reaction substances is n+2:n, wherein n is an integer of 1-100, and the reaction is continued for 1-5 hours to obtain a polyamic acid solution with a concentration of 5%-50%. 2. Preparation of black polyimide solution: In polyamic acid solution with a concentration of 5% to 50% (5% to 30% by weight), add titanate coupling agent modified carbon black with particle size ≤ 100nm (0.5%~10% by weight) and particle size≤60nm titanate coupling agent modified nano-calcium carbonate particles (0.5%~5% by weight), adjust the weight ...

specific Embodiment approach 2

[0015] Specific implementation mode two: as attached figure 1 The preparation method of the printable polyimide black film of shown molecular formula comprises the following steps:

[0016] The difference between this embodiment and embodiment one is that the reaction temperature in step one is 30-80°C

[0017] Others are the same as the first embodiment.

specific Embodiment approach 3

[0018] Specific implementation mode three: as attached figure 1 The preparation method of the printable polyimide black film of shown molecular formula comprises the following steps:

[0019] The difference between this embodiment and embodiment one is that the reaction time in step one is 4 hours

[0020] Others are the same as the first embodiment.

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Abstract

This invention discloses a preparation method of a printable polyimide film. The preparation method comprises the following steps: 1) mixing and stirring 2,5-ortho-dimethyl-4,4'-biphenyldiamine and DMF (dimethyl formamide), and then adding para-diphenyl disulfide tetracarboxylic dianhydride for reaction so as to obtain polyamic acid; 2) diluting polyamic acid obtained in step 1) in DMF, then adding carbon black with a particle size not more than 100 nm and nano-sized activated calcium carbonate to prepare black slurry; and 3) stirring the prepared polyamide acid solution with high activity for 4 hours so as to obtain a black polyamide film by a doctor-blade casting process, and carrying out 4-stage temperature-controlled imidization treatment and 4 times of proportion-predetermined stretching to obtain the polyamide film with thickness of 50 mu m. In the invention, high-activity CaCO3 nanoparticles and carbon black nanoparticles are added while the thermal properties and electrical properties of the polyimide film are maintained, and the polyimide film has the characteristics of good adhesiveness and printability.

Description

technical field [0001] The invention relates to a method for preparing a printable polyimide black film, especially a method of adding highly active nano-calcium carbonate particles and nano-scale carbon black without sacrificing the thermal and electrical properties of the polyimide film The particle is a preparation method of a printable polyimide black film that solves the problems of difficult adhesion and printing of ordinary PI films, and belongs to the technical field of preparation of high molecular polymer films. Background technique [0002] As a special engineering material, polyimide has been widely used in aviation, aerospace, microelectronics, nanometer, liquid crystal, separation membrane, laser and other fields. Recently, countries are listing the research, development and utilization of polyimide as one of the most promising engineering plastics in the 21st century. Polyimide, because of its outstanding characteristics in performance and synthesis, whether ...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/04C08K3/04C08K3/26C08G73/10C08J5/18
Inventor 李棱
Owner SUZHOU ANJIE TECH
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