Patent ID: 8030437
Filing Date: 2011-10-04
Classification: B29C,B29K,C08L

Abstract:
1. A method including: tackifying a preform structure with a first prepolymer component comprising a first monomeric blend of an end-capping component, at least one dianhydride, and at least one diamine or a reaction product of the first monomeric blend; contacting the tackified preform structure by a technique selected from resin infusion (RI) and resin transfer molding (RTM) with a second prepolymer component being different from the first prepolymer component, wherein the second prepolymer component includes a second monomeric blend of an end-capping component, at least one dianhydride or derivative thereof, and at least one diamine, or a reaction product of the second monomeric blend, wherein a polyimide resin system is comprised of the first prepolymer component and the second prepolymer component; and curing the polyimide resin system under suitable conditions such that the first and second prepolymer components mix and react to provide a polyimide composite structure; wherein the first monomeric blend includes: norbornene 2,3-dicarboxylic acid (NE); 3,4,3′,4′-benzophenonetetracarboxylic dianhydride (BTDA); 4,4′-(1,3-phenylene-bis(1-methylethlidene) bisaniline (Bis-M); and 1,3-phenylenediamine (mPDA) or a combination of 3,3′4,4′-biphenyl-tetracarboxylic dianhydride (BPDA) and paraphenylene diamine (pPDA).