Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1983-01-24
1984-08-28
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525113, 525114, 525117, 525142, 525186, 526262, 528322, C08L 3904
Patent
active
044684975
ABSTRACT:
A novel bis-imide matrix resin system especially useful for high temperature, high performance, graphite fiber composites is disclosed. Microcracking of composites is reduced and transverse strength is increased by the addition to the resin system of 1 to 15 percent of compatible elastomers, such as polyether sulfones, bis-phenol linear homopolymeric epoxies or polyacrylic esters. The resin system comprises 50 to 95 percent by weight of ethylenically unsaturated bis-imides, preferably a low melting mixture of a major portion of maleimides of aromatic amines with a minor portion of maleimides of an aliphatic amine and 5 percent to 35 percent by weight of a diunsaturated low-temperature cross-linking agent such as divinyl benzene which gels the bis-imide at low temperatures. Room temperature tackiness, heat resistance and cross-link density are improved by the presence of 1 to 10 percent of a trifunctional curing agent.
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Beckley Don A.
Street Sidney W.
Anderson Harold D.
Hitco
Jacobs Marvin E.
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