US 6,355,764 B1 · Soluble thermosetting polyethersulfone and making of them

Abstract

The invention provides a new soluble thermosetting polyethersulfone resin, which can dissolve in ether solvent such as THF and 1,4-Dioxane. The soluble thermosetting polyethersulfone resin can be introduced the unsaturated olefin functional group, after high temperature (>180° C.) curing the unsaturated olefin functional group gets high heat resistant polyethersulfone resin. The soluble thermosetting polyethersulfone resin is made by two steps reaction, the dihalodiphenylsulfone reacts with dihydroxy aromatic compound and dihydroxybenzoic acid to form carboxy group terminated polyethersulfone resin, then the carboxy group terminated polyethersulfone resin react with unsaturated olefin alcohol or glycidyl acrylate or their derivatives to make soluble thermosetting polyethersulfone resin.

Claims12

Dependent claims

A dielectric insulation material made of polyethersulfone resin that is soluble in ethers solutions, able to be hot pressed, and high thermosetting, this kind of polyethersulfone resin containing unsaturated double bonds is prepared in the following way:

first, let dihalodiphenylsulfone, aromatic dihydroxyphenyl compound, dihydroxybenzoic acid and inorganic soda react at 140-200° C. for 24-48 hrs to form the intermediate product-carboxyl polyethersulfone resin;
then react the intermediate product with acrylic epoxy propylene ester at 100-140° C. for 2-8 hrs (or undergo esterification of the carboxyl polyethersulfone and unsaturated double-bond hydroxyl compounds).

Dependencies are inferred from the claim text.

Soluble thermosetting polyethersulfone and making of them

Life of this patent

Soluble thermosetting polyethersulfone and making of them

Life of this patent

Abstract

Claims12