Basf Aktiengesellschaft

Lockheed Martin Corporation

Cytec Technology Corporation

Linas N Repecka

Jack D Boyd

Ronald P Schmidt

Ross A Benson

Larry R Bersuch

Harry R Miller

Steve Mortimer

Guo Feng Xu

Steve Peake

A method provides for full or partial infusion of resin into three-dimensional, woven textile preforms. Resin film is placed at selected locations adjacent the preform, and the resin film may be separated from other areas of the preform using separator sheets or other materials. The preform is heated and may be vacuum-bagged to apply pressure, or may be rolled or fed through a die. The heat and pressure cause the resin to infuse into the selected areas of the preform adjacent the resin films. The amount of resin in the partial infusion is the same as is necessary to fully infuse the preform, but the resin remains localized in the selected areas until heated again at cure to cause the resin to flow throughout the preform. The method may also be used to fully infuse the preform with resin by providing sufficient temperature and time at that temperature during the initial infusion.

Methods of hot-melt impregnation of 3-D, woven, textile preforms

Methods of hot-melt resin impregnation of 3-D, woven, textile preforms

Manufacture of void-free laminates and use thereof

Heat-curable resin systems containing at least one liquid monomer and one solid component, and which have superior tack and drape, may be prepared by slurry mixing a slurry compatible solid into at least one liquid monomer such that the finished resin system contains the solid as a discontinuous phase having a particle size of less than about 20 .mu.m.

Slurry-mixed heat-curable resin systems having superior tack and drape

Bismaleimide resin systems containing low viscosity epoxy resins and a swellable or soluble thermoplastic when utilized to impregnate intermediate modulus carbon fiber are capable of preparing quasiisotropic composites, which, when cured, exhibit compression strengths after impact of greater than 47-50 ksi after an impact of 1500 in-lb/in.

Extremely tough thermosetting bismaleimide resin systems

Bismaleimide-containing resin systems suitable for preparing structural adhesives and prepregs having superior tack and drape are disclosed. These resin systems, which have improved uniformity and superior resistance to microcracking, contain finely dispersed bismaleimide particles, and are produced by slurry mixing bismaleimide component(s) with one or more liquid comonomers.

Slurry mixing of bismaleimide resins

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Lakewood, CA, United States of America

Linas N Repecka