The present invention provides: a polyimide composite powder which includes 1-30 wt % of a fluorine-based resin filler, and has excellent low dielectric properties; and a production method using water as a dispersion medium. Also provided are a molded body including the polyimide composite powder, and a method for producing same.

The present invention provides: a polyimide composite powder which includes 1-30 wt % of a fluorine-based resin filler, and has excellent low dielectric properties; and a production method using water as a dispersion medium. Also provided are a molded body including the polyimide composite powder, and a method for producing same.

The present invention provides: a polyimide composite powder which includes 1-30 wt % of a fluorine-based resin filler, and has excellent low dielectric properties; and a production method using water as a dispersion medium. Also provided are a molded body including the polyimide composite powder, and a method for producing same.

Transluminally implantable cardiac valves configured for use in cardiac valve replacement and/or cardiac valve exclusion that are capable of percutaneous delivery on low-profile catheters having 15 French size or less. The implantable cardiac valves are fabricated of from a unitary metal material to form a lattice frame support having a main body portion and valve leaflet portion, and a plurality of elongate biasing arm members. A polymer coating or covering is disposed on the valve leaflet portion and the elongate biasing arm members and subtends space between adjacent pairs of elongate biasing arm members to form valve leaflet portions in which the elongate biasing arms and the polymer coating operate to share a mechanical load thereupon.

Transluminally implantable cardiac valves configured for use in cardiac valve replacement and/or cardiac valve exclusion that are capable of percutaneous delivery on low-profile catheters having 15 French size or less. The implantable cardiac valves are fabricated of from a unitary metal material to form a lattice frame support having a main body portion and valve leaflet portion, and a plurality of elongate biasing arm members. A polymer coating or covering is disposed on the valve leaflet portion and the elongate biasing arm members and subtends space between adjacent pairs of elongate biasing arm members to form valve leaflet portions in which the elongate biasing arms and the polymer coating operate to share a mechanical load thereupon.

A polyimide composition, comprising a functionalized polyimide prepared from a substituted or unsubstituted C.sub.4-40 bisanhydride; a substituted or unsubstituted C.sub.1-40 organic diamine; and optionally an organic compound comprising at least two functional groups per molecule, wherein a first functional group is reactive with an anhydride group, an amine group, or a combination thereof, and the first functional group is different from a second functional group, wherein the functionalized polyimide comprises a reactive end group of the formula (C.sub.1-40 hydrocarbylene)-NH.sub.2, (C.sub.1-40 hydrocarbylene)-OH, (C.sub.1-40 hydrocarbylene)-SH, (C.sub.4-40 hydrocarbylene)-G, or a combination thereof, wherein G is an anhydride group, a carboxylic acid, a carboxylic ester, or a combination thereof, wherein the functionalized polyimide has a total reactive end group concentration of 50-1,500 μeq/g of the functionalized polyimide, and wherein the polyimide composition has 0.05-1,000 ppm of residual organic diamine, wherein the functionalized polyimide is obtained by precipitation from a solution using an organic anti-solvent or by devolatilization.

A polyimide composition, comprising a functionalized polyimide prepared from a substituted or unsubstituted C.sub.4-40 bisanhydride; a substituted or unsubstituted C.sub.1-40 organic diamine; and optionally an organic compound comprising at least two functional groups per molecule, wherein a first functional group is reactive with an anhydride group, an amine group, or a combination thereof, and the first functional group is different from a second functional group, wherein the functionalized polyimide comprises a reactive end group of the formula (C.sub.1-40 hydrocarbylene)-NH.sub.2, (C.sub.1-40 hydrocarbylene)-OH, (C.sub.1-40 hydrocarbylene)-SH, (C.sub.4-40 hydrocarbylene)-G, or a combination thereof, wherein G is an anhydride group, a carboxylic acid, a carboxylic ester, or a combination thereof, wherein the functionalized polyimide has a total reactive end group concentration of 50-1,500 μeq/g of the functionalized polyimide, and wherein the polyimide composition has 0.05-1,000 ppm of residual organic diamine, wherein the functionalized polyimide is obtained by precipitation from a solution using an organic anti-solvent or by devolatilization.

A polyimide composition, comprising a functionalized polyimide prepared from a substituted or unsubstituted C.sub.4-40 bisanhydride; a substituted or unsubstituted C.sub.1-40 organic diamine; and optionally an organic compound comprising at least two functional groups per molecule, wherein a first functional group is reactive with an anhydride group, an amine group, or a combination thereof, and the first functional group is different from a second functional group, wherein the functionalized polyimide comprises a reactive end group of the formula (C.sub.1-40 hydrocarbylene)-NH.sub.2, (C.sub.1-40 hydrocarbylene)-OH, (C.sub.1-40 hydrocarbylene)-SH, (C.sub.4-40 hydrocarbylene)-G, or a combination thereof, wherein G is an anhydride group, a carboxylic acid, a carboxylic ester, or a combination thereof, wherein the functionalized polyimide has a total reactive end group concentration of 50-1,500 μeq/g of the functionalized polyimide, and wherein the polyimide composition has 0.05-1,000 ppm of residual organic diamine, wherein the functionalized polyimide is obtained by precipitation from a solution using an organic anti-solvent or by devolatilization.

The present invention relates to a thermoplastic molding compound comprising a polyalkylene terephthalate and a polyimide, wherein the molding compound has a single glass transition temperature in DSC measurement. The present invention further relates to the use thereof and to fibers, films and shaped bodies produced from the molding compound.

The present invention relates to a thermoplastic molding compound comprising a polyalkylene terephthalate and a polyimide, wherein the molding compound has a single glass transition temperature in DSC measurement. The present invention further relates to the use thereof and to fibers, films and shaped bodies produced from the molding compound.