Polyimide

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

528170, 528171, 528172, 528173, 528174, 528188, 528183, 528220, 528224, 528229, 528324, 528367, 546296, C08G 7710, C08G 6926, C07D21369

Patent

active

054709431

ABSTRACT:
This invention relates to a novel fluorine-containing polyimide or polyimide copolymer being colorless and having transparency and very low dielectric characteristics, and has a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the polyimide or polyimide copolymer and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition.
The polyimide comprise a requisite structural unit having one or more recurring structural units of the formula: ##STR1## wherein Ar is a tetravalent radical having 6 to 27 carbon atoms and being selected from the group consisting of a monoaromatic radical, condensed polyaromatic radical and noncondensed polyaromatic radical having aromatic radicals connected to each other with a direct bond or a bridge member, a trifluoromethyl radical is situated at the 3- or the 4-position on a pyridine nucleus, and an imide nitrogen atom is connected at the 3- or the 4-position to an ether bond.
The polyimide or polyimide copolymer has excellent heat resistance, outstanding melt-flow stability and greatly improved processability, and also is colorless and has high transparency and very low dielectric coefficient, and can be expected to be used as raw materials for electric.cndot.electronic appliances and optical instruments due to the above characteristics.

REFERENCES:
patent: 5089593 (1992-02-01), Fjare et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Polyimide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyimide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyimide will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2014467

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.