摘要:
Novel curable resin compositions are disclosed containing an aromatic cyanate ester and an allyl ether of a bisphenol as a modifier. These compositions provide improved prepregs and composites. Additional modifiers including epoxy resins and bismaleimides may be included.
摘要:
1)Curable resins comprising a mixture of a) at least one bisimide of the general formula I in which B represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical containing at least two carbon atoms, b) at least one amino acid hydrazide of formula II in which D is a divalent group, and c) at least one alkenylphenol or ether thereof of formula III in which m = 0 or 1, E is a divalent radical and G represents a phenyl ring substituted by at least one alkenyl group and at least one hydroxy or alkoxy group.
摘要:
Diamine und Bismaleinimide der allgemeinen Formel I,
in der R 1 und R 2 ein H-Atom oder gemeinsam die Gruppe -OC-CH = CH-CO-, Y 1 und Y 2 unabhängig voneinander O oder S, und Het einen fünfgliedrigen Heterocyclus mit 2 oder 3 Heteroatomen bedeuten, sowie daraus hergestellte, gegebenenfalls nicht vollständig ausgehärtete, gegebenenfalls faserverstärkte Polyimide.
摘要:
Ethylenically-unsaturated ethers of alkenyl phenols are useful as reactive diluents for bismaleimides. Formulations comprising bismaleimides and the reactive diluents of this invention are particularly useful for producing heat and moisture resistant fiber-reinforced composites.
摘要:
Beschrieben werden polymerisierbare Zusammensetzungen enthaltend ein Gemisch aus A) einer Verbindung enthaltend wenigstens einen allyl-oder methallylsubstituierten Bicyclo[2.2.1]hept-5-en-2,3-dicarbonsäureimidrest, und B) einer Verbindung enthaltend wenigstens einen polymerisierbaren Rest der Formel I worin R Wasserstoff oder Methyl ist. Typische Beispiels für A) bzw. B) sind Bis-[4-(allylbicy- clo[2.2.1]hept-5-en-2,3-dicarboximidophenyl)]methan bzw. Acrylate oder Methacrylate von mehrwertigen Alkoholen. Die Mischungen können photopolymerisiert oder hitzegehärtet werden. Sie lassen sich zur Herstellung von Prepregs oder in Abbildungsverfahren einsetzen.
摘要:
Compositions containing an unsaturated bisimide component (A) and a diamine component (B) at the (A)/(B) molar ratio of 0.9-1.5 and (C) 0.01-4.0% by weight, based on the sum of (A) and (B), of at least one compound selected from radical polymerization inhibitors, carboxylic acids and acid anhydrides provide, upon heating, imide type prepolymer compositions which can be cured to provide products which are tough and have excellent adhesive strength to glass cloths and metals and heat resistance.
摘要:
Novel polyfunctional maleimide-based thermosettable resin compositions are provided which have improved processing capability and which comprise at least one polyfunctional maleimide compound and at least one alkenyl derivative of 2,2′-dihydroxybiphenyl.
摘要:
Polyimide oligomers include (1) linear, monofunctional crosslinking oligomers prepared by condensing a monoanhydride end cap with a diamine that includes alternating ether and "sulfone" (-SO 2 -, -S-, -CO-, -(CF 3 ) 2 C-, or -(CH 3 ) 2 C-) linkages connecting alternating aromatic radicals and with a dianhydride (or dianhydride mixture), particularly the unsaturated, aliphatic dianhydride commonly known as MCTC; (2) linear, mono- or difunctional crosslinking oligomers prepared by condensing an amine end cap with a diamine and a dianhydride; and (3) multidimensional, crosslinking oligomers having an aromatic hub and at least three radiating arms connected to the hub, each arm including a crosslinking end cap at its distal end and at least one imide linkage. Blends, prepregs, and composites can be prepared from the oligomers. Multidimensional oligomers can be prepared using etheranhydride intermediates or etheramine intermediates formed by reacting a suitable hub with nitrophthalic anhydride or aminophenol.
摘要:
Bismaleinimide der Formel I, worin R einen Rest der Formel II bedeutet, sowie Polyimide die aus diesen Bismaleinimiden, gegebenenfalls unter Zusatz eines aromatischen Diamins herstellbar sind. Die Polyimide sind gegebenenfalls mit Fasern verstärkt.