Soluble polyimide resin, process for production thereof, and...

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 73/10 (2006.01) C08L 79/08 (2006.01) C09D 179/08 (2006.01)

Patent

CA 2247287

The present invention provides a novel soluble polyimide resin which is superior in solubility in solvents and transparency, which is useful particularly in electronics and optronics fields, and which has good processability; a process for production of the resin; and a solution composition of the resin. A soluble polyimide resin containing, as part or the whole of the diamine units, a 2,5(or 6)-bis(aminomethy 1)bicyclo[2.2.1]heptane and having a light transmittance of 60% or more in a range of wavelength larger than 400 nm in an ultraviolet-visible light spectrum measured for a film of 10-µm thickness; a process for production of the resin; and a solution composition of the resin.

L'invention concerne une nouvelle résine polyimide soluble présentant une excellente solubilité dans un solvant, une très bonne transparence, ce qui la rend utile notamment dans le domaine de l'électronique et de l'optoélectronique, et une bonne aptitude au moulage; ainsi qu'un procédé permettant de préparer ladite résine et une composition comprenant une solution de ladite résine polyimide soluble. Celle-ci contient du 2,5-(ou 6)-bis(aminométhyl)bicyclo[2.2.1]heptane, qui représente une partie ou la totalité des unités diamine, et elle a une transmittance d'au moins 60 % dans les longueurs d'onde supérieures à 400 nm du spectre d'absorption ultraviolet/lumière visible quand elle se présente sous la forme d'une couche de 10 mu m d'épaisseur.

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