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US 5,346,769 AGranted
Process for preparing a prepeg comprising a resin derived from dialkenylbenzene and polyarylamine reactants
AssigneeShell Oil Company
InventorLarry S. Corley
Life of this patent
Estimating the term…
Abstract
A solventless thermosettable composition comprising a dialkenylbenzene and an effective amount of an alkylbenzenesul fonic acid curina aqent exhibits reduced tendency to gel during cure with the addition of a polyarylamine. The cured material, which is particularly useful in electrical/electronic applications, exhibits low dielectric constant and good fracture toughness.
Claims11
A process for preparing a prepreg comprising:
- impregnating a fibrous glass substitute with a solventless thermosettable composition comprising:
- (a) a dialkenylbenzene represented by the structural formula ##STR3## in which R.sup.1 and R.sup.2 are each independently selected from the group consisting of C.sub.1-6 alkyl, C.sub.1-6 alkoxy and halogen;
- (b) from about 0.05 to about 5 weight percent, based on the weight of the dialkenylbenzene, of a cationic curing agent for the dialkenylbenzene;
- and
- (c) a polyarylamine present in an amount effective to inhibit gelation of the dialkenylbenzene and within the range of about 0.05 and 20 moles per mole of the curing agent;
- and subjecting said impregnated substrate to an elevated temperature effective to partially cure the thermosettable composition.
3 more elements
The process of claim 9 in which the polyarylamine is present in the composition in an amount within the range of about 0.05 to about 20 moles per mole of the cationic curing agent.
Dependencies are inferred from the claim text.