Resin rich epoxide-mica flexible high voltage insulation

A method of making a flexible void free mica sheet material comprising the steps of:

• a. mixing solid epoxide resin, liquid epoxide resin, ketone solvent and aromatic hydrocarbon co-solvent selected from the group consisting of benzene and arene solvents and mixtures thereof;
• wherein the weight ratio of solid epoxide:liquid epoxide is from about 60:40 to 95:5;
• the weight ratio of ketone:
• co-solvent is from about 70:30 to 30:70 and the weight ratio of total epoxide:
• total solvent is from about 85:15 to 30:70, and then
• b. mixing the epoxide -- solvent mixture, with an organo-titanate catalyst selected from compounds having the structural formula Ti(OR).sub.4, wherein each R group is independently selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aryl groups, Cl, Br or N0.sub.2 substituted aryl groups, alkaryl groups with the alkyl constituent having from about 1-10 carbon atoms, Cl, Br or N0.sub.2 substituted alkaryl groups with the alkyl constituent having from about 1-10 carbons, aralkyl groups with the alkyl constituent having about 1-10 carbon atoms, cyclopentane groups, cyclopentene groups, cyclopentadiene groups, cyclohexane groups, cyclohexene groups, and cyclohexadiene groups, to form a homogeneous admixture,
• c. applying the homogeneous catalyzed epoxide-solvent admixture to a sheet material comprising mica, so that organo-titanate contacts mica causing organo-titanate to act as a latent catalyst,
• d. removing solvent from the epoxide-solvent admixture in the sheet material to form a flexible B staged epoxide resin containing organo-titanate as a latent catalyst contacting mica in the sheet material;
• wherein the amount of organo-titanate added is effective to cure the epoxide in the sheet material upon heating.