Phosphoric Acid Resistant Polymaleimide Prepolymer Compositions
AssigneeHuntsman Advanced Materials Americans Inc.
InventorsRoger Tietze, Yen-Loan Nguyen
Life of this patent
Estimating the term…
Abstract
The present invention relates to a phosphoric acid resistant advanced polymaleimide prepolymer composition including a polymaleimide prepolymer resulting from the advancement reaction of a polyimide and an alkenylphenol, alkenylphenol ether or mixture thereof in the presence of an amine catalyst; a solvent and a heteropolyacid. The phosphoric acid resistant advanced polymaleimide prepolymer composition may be used in various applications such as prepregs, laminates, printed circuit boards, castings, composites, moulded articles, adhesives and coatings.
Claims11
A phosphoric acid resistant advanced polymaleimide prepolymer composition comprising:
- (a) a polymaleimide prepolymer resulting from the advancement reaction of a polyimide and an alkenylphenol, alkenylphenol ether or mixture thereof in the presence of an amine catalyst;
- (b) a solvent;
- and
- (c) a heteropolyacid.
The phosphoric acid resistant advanced polymaleimide prepolymer composition wherein the solvent is acetone.
A process for preparing a phosphoric acid resistant advanced polymaleimide prepolymer composition comprising the steps of:
- (a) reacting at an elevated temperature a polyimide and an alkenylphenol, an alkenylphenol ether or mixture thereof, in the presence of an amine catalyst to form a polymaleimide prepolymer:
- (b) substantially removing all of the amine catalyst;
- and
- (c) adding a solvent and heteropolyacid to the polymaleimide prepolymer to form the phosphoric acid resistant advanced polymaleimide prepolymer composition.
A prepreg or laminate structure comprising the cured product of a fabric or fiber impregnated or coated with a phosphoric acid resistant advanced polymaleimide prepolymer composition comprising:
- (a) a polymaleimide prepolymer resulting from the advancement reaction of a polyimide and an alkenylphenol, alkenylphenol ether or mixture thereof in the presence of an amine catalyst;
- (b) a solvent;
- and
- (c) a heteropolyacid.
Dependencies are inferred from the claim text.