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Polyamic Acid Composition, Polyamideimide Film Thereof and Method for Preparing Polyamideimide Film

A technology of polyamide-imide film and polyamic acid is applied in the field of preparing the polyamide-imide film, and can solve the problems of reduced transmittance and the like

Active Publication Date: 2017-11-28
SK INNOVATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, the transmittance of transparent polyimides decreases rapidly at short wavelengths (i.e. below 450nm)

Method used

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  • Polyamic Acid Composition, Polyamideimide Film Thereof and Method for Preparing Polyamideimide Film

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Experimental program
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preparation example Construction

[0054] The preparation of oligomeric amic acid solution in the step (a) is to add organic solvent in the reactor, and 2,2'-bis (trifluoromethyl) benzidine is dissolved in the reactor, subsequently with cycloaliphatic di The step of anhydride reaction, wherein it is preferable to add the monomer to the organic solvent in a stepwise manner, rather than adding the monomer to the organic solvent at one time, because the reactivity can be improved. Moreover, first, it is more preferable to fully dissolve 2,2'-bis(trifluoromethyl)benzidine in an organic solvent.

[0055] The organic solvent is the same as above, and is preferably dimethylacetamide or N-methyl-2-pyrrolidone. In addition, there is no great limitation on the content of the organic solvent, which may be appropriately selected in consideration of the molecular weight of the polyamideimide resin obtained by copolymerization, and may be 70-95% by weight of the total composition. Preferably, the content of the organic solv...

Embodiment 1

[0096] Embodiment 1[TFMB:CBDA:The molar ratio of IPC=100:60:40]

[0097] Under a nitrogen atmosphere, N,N-dimethylacetamide (DMAc) and 2,2'-bis(trifluoromethyl)benzidine (TFMB) were added to the reactor, and the mixture was stirred well. Then, cyclobutanetetracarboxylic dianhydride (CBDA) was added thereto, and stirred sufficiently until dissolved. Then, isophthaloyl chloride (IPC) was added thereto, and stirred for 6 hours, and then dissolved and reacted, thereby preparing a polyamic acid composition. Here, the content of each monomer was the same as the composition ratio in Table 1 below, and the temperature of the reactor was kept at 30°C. The viscosity of the prepared polyamic acid composition was 90,000 cps. Next, pyridine and acetic anhydride were added to the solution at a content of 2.5 times the content of cyclobutanetetracarboxylic dianhydride (CBDA), and stirred at 60° C. for 1 hour.

[0098] Then, the solution was precipitated with excess methanol, and the resul...

Embodiment 2

[0100] Embodiment 2[TFMB:CBDA:The molar ratio of IPC=100:50:50]

[0101] Under a nitrogen atmosphere, N,N-dimethylacetamide (DMAc) and 2,2'-bis(trifluoromethyl)benzidine (TFMB) were added to the reactor, and the mixture was stirred well. Then, cyclobutanetetracarboxylic dianhydride (CBDA) was added thereto, and stirred sufficiently until dissolved. Then, isophthaloyl chloride (IPC) was added thereto, and stirred for 6 hours, and then dissolved and reacted, thereby preparing a polyamic acid composition. Here, the content of each monomer was the same as the composition ratio in Table 1 below, and the temperature of the reactor was kept at 30°C. The viscosity of the prepared polyamic acid composition was 77,000 cps. Next, pyridine and acetic anhydride were added to the solution at a content of 2.5 times the content of cyclobutanetetracarboxylic dianhydride (CBDA), and stirred at 60° C. for 1 hour.

[0102] Then, the solution was precipitated with excess methanol, and the resul...

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Abstract

Provided are a polyamic acid composition, a polyamideimide film thereof, and a method for preparing the polyamideimide film. More specifically, provided are a polyamideimide film capable of implementing excellent optical properties in addition to inherent physical properties of polyimide by using a polyamic acid composition including a combination of specific components, and a method for preparing the polyamideimide film.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Applications No. 10-2016-0061797 and No. 10-2017-0054484 filed with the Korean Intellectual Property Office on May 20, 2016 and April 27, 2017, the disclosures of which are incorporated by reference Incorporated into this article as a whole. technical field [0003] The present invention relates to a polyamic acid composition, a polyamideimide film thereof, and a method for preparing the polyamideimide film. More specifically, the present invention relates to a polyamide-imide film capable of realizing excellent optical properties including inherent physical properties of polyimide by using a polyamic acid composition containing a combination of specific ingredients, and the preparation of the polyamide-imide film imine membrane method. Background technique [0004] In general, polyimides are used in various fields including insulating substrates for forming circuit...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08J5/18
CPCC08G73/1007C08G73/1039C08G73/1042C08G73/1078C08J5/18C08J2379/08C08G73/14C08L79/08
Inventor 朴相胤金贤贞朴真炯张太硕
Owner SK INNOVATION CO LTD
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