Phosphoric acid resistant polymaleimide prepolymer compositions
AssigneeHuntsman Advanced Materials Americas LLC
InventorsRoger Tietze, Yen-Loan Nguyen
Life of this patent
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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, molded articles, adhesives and coatings.
Claims8
A phosphoric acid resistant advanced polymaleimide prepolymer composition comprising:
- (a) a polymaleimide prepolymer resulting from the advancement reaction of a polyimide containing at least two radicals of the formula
- where R1 is hydrogen or methyl and an alkenylphenol, alkenylphenol ether or mixture thereof in the presence of an amine catalyst;
- (b) 20-30 parts by weight, based on the total weight of the composition, of a solvent;
- and
- (c) 0.1-1.0 parts by weight, based on the total weight of the composition, of a heteropolyacid
- wherein the solvent and the heteropolyacid are added to the polymaleimide prepolymer at the conclusion of the advancement reaction and the phosphoric acid resistant advanced polymaleimide prepolymer composition has a viscosity of 50 centipoise or less.
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 containing at least two radicals of the formula
- where R1 is hydrogen or methyl and an alkenylphenol, alkenylphenol ether or mixture thereof in the presence of an amine catalyst;
- (b) 20-30 parts by weight, based on the total weight of the composition, of a solvent;
- and
- (c) 0.1-1.0 parts by weight, based on the total weight of the composition, of a heteropolyacid wherein the solvent and the heteropolyacid are added to the polymaleimide prepolymer at the conclusion of the advancement reaction and the phosphoric acid resistant advanced polymaleimide prepolymer composition has a viscosity of 50 centipoise or less.
Dependencies are inferred from the claim text.