continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6370/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :21/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : CATALYSIS OF POLYIMIDE CURING
(51) International classification :C08G 73/10 (71)Name of Applicant :
(31) Priority Document No :11/377,599
1)ALTANA ELECTRICAL INSULATION GMBH
(32) Priority Date :16/03/2006
Address of Applicant :ABELSTR. 45, 46483 WESEL (DE)
(33) Name of priority country :U.S.A.
Germany
(86) International Application No :PCT/EP2007/050622 (72)Name of Inventor :
Filing Date
:23/01/2007
1)MURRAY,THOMAS J.
(87) International Publication No :WO 2007/104593 2)MEISTER,PHILIP R.
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
Polyimide oligomers and polymers are cured with the assistance of a phosphorus based catalyst, such as an aryl, alkyl or arylalkyl
phosphite. The resulting material has the desirable high thermal properties of condensation polyimides, but with minimal outgassing
of water during cure. Novel properties obtained include an increase in glass transition, crosslink density, lower temperature cure, and
improved film formation. These properties are important in applications including solvent based coatings, films, powder coatings,
preimpregnated (prepreg) coatings, laminates, compression molding, and thermosetting resin extrusions.
No. of Pages : 20 No. of Claims : 20
The Patent Office Journal 24/10/2008 25838