Tin containing esterimide polymer resins and method of forming

Claim 1

A METHOD OF FORMING BRANCHED THERMOSETTING ESTERIMIDE POLYMER RESIN SUITABLE FOR DEPOSITION ATOP AN ELECTRICAL CONDUCTOR COMPRISING PREPARING A POLYESTER BY REACTING AT LEAST ONE DI- OR TRIFUNCTIONAL POLYHYDRIC ALCOHOL AND AT LEAST ONE POLYCARBOXYLIC ACID OR DIALKYL ESTER THEREOF SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC, TEREPHTHALIC, BENZOPHENONE DICARBOXYLIC AND MIXTURES OF THE FOREGOING WITH UP TO 50% BY WEIGHT OF AN ACID OR ALKYL ESTER THEREOF SELECTED FROM THE GROUP CONSISTING OF SUCCINIC, TRIMESIC, HEMIMELLITIC, TRIMELLITIC, ORTHOPHTHALIC, TETRACHLOROPHTHALIC, SEBACIC, HEXACHLOROENDOMETHYLENE TETRAHYDORPHTHALIC IN THE PRESENCE OF A DIFUNCTIONAL ESTER FORMING ORGANOTIN COMPOUND TO PRODUCE A HYDROXY TERMINATED POLYESTER CONTAINING BETWEEN 0.4 AND 2% BY WEIGHT TIN ATOMS IN THE POLYMER BACKBONE, FORMING A POLYIMIDE BY REACTING A DIAMINE AND AN AROMATIC CARBOXYLIC ANHYDRIDE CONTAINING AT LEAST ONE ADDITIONAL CARBOXYLIC GROUP, HYPREPARING AN ESTERMIDE POLYMER BY REACTING SAID POLYIMIDE WITH SAID TIN CONTAINING HYDROXY TERMINATED POLYESTER TO OBTAIN A BRANCHED THERMOSETTING ESTERIMIDE RESIN CONTAINING TIN ATOMS IN THE POLYMER BACKBONE, SAID RESIN CONTAINING BY WEIGHT 70-60% POLYESTER AND 30-40% POLYIMIDE AND GRINDING SAID BRANCHED ESTERIMIDE RESIN TO A PARTICLE SIZE BETWEEN APPROXIMATELY 10 AND 150 MICROMETERS FOR POWDER DEPOSITION ATOP A CONDUCTOR.

Claim 2

A METHOD OF FORMING BRANCHED THERMOSETTING ESTERIMIDE POLYMER RESIN SUITABLE FOR DEPOSITION ATOP AN ELECTRICAL CONDUCTOR COMPRISING PREPARING A POLYESTER BY REACTING AT LEAST ONE DI- OR TRIFUNCTIONAL POLYHYDRIC ALCOHOL AND AT LEAST ONE POLYCARBOXYLIC ACID OR DIALKYL ESTER THEREOF SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC, TEREPHTHALIC, BENZOPHENONE DICARBOXYLIC AND MIXTURES OF THE FOREGOING WITH UP TO 50% BY WEIGHT OF AN ACID OR ALKYL ESTER THEREOF SELECTED FROM THE GROUP CONSISTING OF SUCCINIC, TRIMESIC, HEMIMELLITIC, TRIMELLITIC, ORTHOPHTHALIC, TETRACHLOROPHTHALIC, SEBACIC, HEXACHLOROENDOMETHYLENE TETRAHYDORPHTHALIC IN THE PRESENCE OF A DIFUNCTIONAL ESTER FORMING ORGANOTIN COMPOUND TO PRODUCE A HYDROXY TERMINATED POLYESTER CONTAINING BETWEEN 0.4 AND 2% BY WEIGHT TIN ATOMS IN THE POLYMER BACKBONE, FORMING A POLYIMIDE BY REACTING A DIAMINE AND AN AROMATIC CARBOXYLIC ANHYDRIDE CONTAINING AT LEAST ONE ADDITIONAL CARBOXYLIC GROUP, HYPREPARING AN ESTERMIDE POLYMER BY REACTING SAID POLYIMIDE WITH SAID TIN CONTAINING HYDROXY TERMINATED POLYESTER TO OBTAIN A BRANCHED THERMOSETTING ESTERIMIDE RESIN CONTAINING TIN ATOMS IN THE POLYMER BACKBONE, SAID RESIN CONTAINING BY WEIGHT 70-60% POLYESTER AND 30-40% POLYIMIDE AND GRINDING SAID BRANCHED ESTERIMIDE RESIN TO A PARTICLE SIZE BETWEEN APPROXIMATELY 10 AND 150 MICROMETERS FOR POWDER DEPOSITION ATOP A CONDUCTOR.

Claim 11

A method of forming branched thermosetting polymer resin powder suitable for deposition atop an electrical conductor comprising preparing a polyester by reacting 16-50 weight % of tris (2-hydroxyethyl) isocyanurate, 8-20 weight % of ethylene glycol and 32-56 weight % of dimethyl terephthalate in the presence of 2-23 weight % of di-functional di-n-butyltin oxide and 0.001-0.05 weight % litharge to produce a hydroxy terminated polyester, with tin atoms in the polymer backbone, forming a polyimide by reacting a diamine and an aromatic carboxylic anhydride containing at least one additional carboxylic group, preparing an esterimide polymer by reacting said polyimide with said tin containing hydroxy terminated polyester to obtain a branched thermosetting esterimide resin containing tin atoms in the polymer backbone, said resin containing 70-60% polyester and 30-40% of polyimide by weight.

Claim 12

A method of forming branched thermosetting polymer resin powder suitable for deposition atop an electrical conductor comprising preparing a polyester by reacting 16-50 weight % of tris (2-hydroxyethyl) isocyanurate, 8-20 weight % of ethylene glycol and 32-56 weight % of dimethyl terephthalate in the presence of 2-23 weight % of di-functional di-n-butyltin oxide and 0.001-0.05 weight % litharge to produce a hydroxy terminated polyester, with tin atoms in the polymer backbone, forming a polyimide by reacting a diamine and an aromatic carboxylic anhydride containing at least one additional carboxylic group, preparing an esterimide polymer by reacting said polyimide with said tin containing hydroxy terminated polyester to obtain a branched thermosetting esterimide resin containing tin atoms in the polymer backbone, said resin containing 70-60% polyester and 30-40% of polyimide by weight.