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US 4,902,778 AGranted
Propenylphenoxy-terminated oligomeric tougheners and their use in toughening thermosetting bismaleimide resin compositions
AssigneeBASF SE
InventorJack D. Boyd
Life of this patent
Estimating the term…
Abstract
Chain extended tougheners derived from the reaction of a propenylphenol, a di- or polyphenol, and an epoxy resin may be used to increase the toughness of bismaleimide resin systems.
Claims4
A heat curable resin composition comprising:
- (a) a maleimide-group-containing, heat curable resin;
- and
- (b) a toughening amount of a chain-extended toughener which is the reaction product of a 2-propenylphenol, a diphenol or polyphenol, and an epoxy resin,
- wherein said toughener has the formula:
- ##STR4## wherein X is the residuum of an epoxy resin and wherein Y is the residuum of a diphenol or polyphenol having n phenolic hydroxyls, where n is an integer of from 2 to about 4.
2 more elements
Dependencies are inferred from the claim text.