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US 4,544,728 AGranted
Storage-stable thermosetting compositions comprising imido prepolymers
AssigneeRhone-Poulenc Specialites Chimiques
InventorsRene Dien, Guy Poulain
Life of this patent
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Abstract
Storage-stable thermosetting compositions, well adopted for molding or the production of prepregs, and characterized by the absense of gas release upon crosslinking, are comprised of (A) an imido/hydroxylated organosilicon compound prepolymer, (B) triallyl isocyanurate or an acrylic ester of an ethoxyphenylated siloxane, and (C) an imidazole compound.
Claims15
A thermosetting composition of matter which comprises:
- (A) a prepolymeric reaction product of:
- (a) a diimide or plurality of diimides, or combination of diimide and N-cyclohexylmaleimide, each such diimide or diimides having the general formula:
- ##STR7## wherein Y is H or CH.sub.3 and L is cyclohexylene, phenylene, tolylene, 2,5-diethyltolylene, or a radical of the formula:
- ##STR8## in which T is:
- ##STR9## and X is H, CH.sub.3 or isopropyl;
- with (b) an organosilicon compound comprising at least one hydroxy group bonded to a silicon atom thereof;
- (B) a triallyl isocyanurate, or an acrylic ester of an ethoxyphenylated siloxane compound of the general formula:
- ##STR10## in which R is H, CH.sub.3 or C.sub.2 H.sub.5 ;
- and (C) an imidazole compound.
6 more elements
Dependencies are inferred from the claim text.