Patent · US Active

Porous branched/highly branched polyimides

US9676915B2 · kind B2 · utility

0Cited by

5References

16Claims

0Family size

Assignee

BASF SE

Inventors

Anna Cristadoro · Heppenheim, DE
Raimund Pietruschka · Ebertsheim, DE
Marc Fricke · Straubing, DE
Mark Elbing · Bremen, DE

Key dates

Filing date	Dec 12, 2013
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Dec 12, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2379/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of porous particles comprising at least one polyimide by reacting (A) at least one polyisocyanate having on average at least two isocyanate groups per molecule and (B) at least one polycarboxylic acid having at least two COOH groups per molecule or anhydride thereof, in the presence of at least one solvent, optionally at least one catalyst and optionally at least one further additive, to cause precipitation of a polyimide in the solvent to form the porous particles, to porous particles, obtained with this process, to parts, bodies, foams and/or material comprising these porous particles, and to the use of the porous particles or of the parts, bodies, foams and/or material as insulation material and in vacuum insulation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.