Polyimide resin laminates
AssigneeAllied-Signal Inc.
InventorsLarry D. Olson, Jeffrey R. Kamla, Henry R. Johnson
Life of this patent
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Abstract
A thermosetting resin is comprised of (a) a bisimide, particularly a bismaleimide, (b) a reactive brominated aromatic compound, particularly a member of the group consisting of group consisting of tribromophenyl maleimide, tribromostyrene, and pentabromobenzyl acrylate; and (c) a multifunctional nitrogen compound, particularly dicyandiamide, and optionally (d) ethylene bistetrabromophthalimide.
Claims9
A thermosetting resin composition consisting essentially of:
- (a) a bisimide having the formula:
- ##STR9## where A comprises at least one of alkylene radicals having 1 to 20 carbon atoms, cycloalkylene radicals having 4 to 40 carbon atoms, heterocyclic radicals containing at least one of O, S, and N, and phenylene or polycyclic aromatic radicals
- D is a divalent radical containing a carbon-carbon double bond;
- b) a reactive brominated aromatic compound selected from the group consisting of imides, styrenes, and acrylates;
- wherein said imides have the formula ##STR10## where R.sub.5, is independently selected from the group consisting of H and lower alkyl
- a is an integer from 1 to 5;
- and
- wherein said styrenes have the formula ##STR11## where R.sub.6 is independently selected from the group consisting of H and lower alkyl
- b is an integer from 1 to 5;
- and
- wherein said acrylates have the formula ##STR12## where R.sub.7 is independently selected from the group consisting of H and lower alkyl;
- c is an integer from 1 to 5;
- (c) dicyandiamide;
- and (d) with or without ethylene bistetrabromophthalimide.
A flame resistant laminate comprising a reinforcing fabric and a cured thermosetting resin composition consisting essentially of:
- (a) a bismaleimide;
- (b) a reactive brominated aromatic compound selected from the group consisting of tribromophenyl maleimide, tribromostyrene, and pentabromobenzyl acrylate;
- and
- (c) dicyandiamide, with or without
- (d) ethylene bistetrabromophthalimide.
Dependencies are inferred from the claim text.