Polyimide containing tio2, articles, and process of making

Claim 1

A PROCESS WHICH COMPRISES MIXING AT LEAST ONE DIAMINE HAVING THE STRUCTURAL FORMULA H2N-R''-NH2 WHEREIN R'' IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF -(1,4-PHENYLENE)-, -(1,3-PHENYLENE)-, -BIPHENYLYLENE-, WHERE R" IS SELECTED FROM THE GROUP CONSISTING OF AN ALKYLENE CHAIN HAVING 1-3 CARBONS ATOMS, -O-, -S-, -SO2-, -N(-R"'')-, -SI(-R"'')(-R"")-, -O-SI(-R"'')(-R"")-O-, WHERE R"'' AND R"" ARE SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ARYL; WITH AT LEAST ONE TETRACARBOXYLIC ACID DIANHYDRIDE HAVING THE STUCTURAL FORMULA (-CO-O-CO-)>R<(-CO-O-CO-) -NAPHTHYLENE- AND -PHENYLENE-R"-PHENYLENE-P(=O)(-R"'')- AND -O-P(=O)(-R"'')-OWHEREIN R IS A TETRAVALENT ORGANIC RADICAL CONTAINING AT LEAST 2 CARBON ATOMS, NO MORE THAN 2 CARBONYL GROUPS OF SAID DIANYHDRIDE ATTACHED TO ANY ONE CARBON ATOM OF SAID TETRAVALENT RADICAL; IN A SOLVENT FOR AT LEAST ONE OF SAID DIAMINE AND SAID DIANHYDRIDE UNDER CONDITIONS TO FORM A POLYAMIDE-ACID; ADDING TITANIUM DIOXIDE PARTICLES TO FORM A SHAPEABLE POLYMERIC COMPOSITION HAVING SAID TITANIUM DIOXIDE PARTICLES DISPERSED UNIFORMLY THEREIN; SHAPING SAID COMPOSITION INTO A SHAPED ARTICLES; AND CONVERTING THE POLYMER IN SAID POLYMERIC COMPOSITION TO POLYIMIDE.