Abstract: A thermoplastic powder slurry for making fiber reinforced composite structure prepregs having tack, drape and easy handleability is disclosed. A slurry of thermoplastic resin powder suspended in a solution of distilled water, a water-soluble polymer, a wetting agent, a biocide, a plasticizer and an antifoamer, which is used to impregnate suitable reinforcing fibers, either continuous or woven, makes a prepreg having tack, drape and easy handleability. The slurry may also include a viscosity reducer. The disclosed slurry can also be drawn into an adhesive tape or film.

Abstract: An aqueous composition for treating fibers for use in the resin transfer/injection molding of high density continuous fiber preforms which comprises about 0.005 to 0.05 php wetting agent, about 0.05 to 0.25 php binder, about 0.10 to 1.00 php polymer, about 0.005 to 0.05 php plasticizer and about 0.05 to 0.25 php water soluble oil, balance water, wherein the term "php" is intended to mean parts per 100 parts water (w/w). This composition, when applied to fibers, allows high fiber tension to be applied during preform fabrication without causing damage due to mechanical abrasion of the fibers. The composition also promotes resin to fiber adhesion and speeds the flow of resin through the dense preform during resin injection/transfer molding.

Abstract: A combination mechanically retained and adhesively bonded attachment structure and method for a guy wire, cable, rod, tube or like member is described which comprises an elongate fitting of preselected external shape having a plurality of axially spaced coaxial bores of respective preselected diameters, the smallest selected to loosely receive the member to be attached, the annular spaces defined between the fitting and member being packed with a finely divided particulate abrasive material and filled with a curable resin to form an adhesive bond between the abrasive material, fitting and member and to define abrasive interfaces between the abrasive material and fitting and between the abrasive material and member.

Abstract: A paint or other protective coating removal arrangement involving the use of reciprocal motion ultrasonic frequency mechanical energy applied to the coating by a variety of tool and abrasive substrate members in the company of surface preparation agents such as coolant, heating, softening, and/or abrasive agents. The invention is particularly applicable and disclosed in terms of protective coating removal from aircraft, such as is often necessary for replacement or in the reutilization of aircraft with different identification markings. The coating removal arrangement is environmentally and human operator safe in comparison with presently used coating removal arrangements such as abrasive blasting and chemical solvent removal.

Abstract: A paint or other protective coating removal method involving the use of reciprocal motion ultrasonic frequency mechanical energy applied to the coating by a variety of tool and abrasive substrate members in the company of surface preparation agents such as coolant, heating, softening, and/or abrasive agents. The invention is particularly applicable and disclosed in terms of, protective coating removal from aircraft such as is often necessary for replacement or in the reutilization of aircraft with different identification markings. The coating removal method is environmentally and human operator safe in comparison with presently used coating removal methods such as abrasive blasting and chemical solvent removal.

Abstract: A polymeric composition comprised of a mixture of an acetylene-terminated polymer and an hydroxy-substituted, polynuclear, aromatic derivative as a cure retarding additive.

Abstract: A composition of matter comprising an acetylene-terminated polyimide oligomer and a cure rate inhibitor selected from the group consisting of hydroquinone, maleic acid, glutaric acid, dibetanapthyl para-phenylene diamine. The composition has a retarded cure rate, thereby facilitating the fabrication of void-free molded objects and composites.

Abstract: A primer, particularly for aluminum and aluminum alloys, that is free of alkaline materials and consists essentially of an aqueous solution of a water soluble condensation product of (1) phenol, resorcinol or a mixture of phenol and resorcinol and (2) formaldehyde.

Abstract: A composition of matter comprising an acetylene-terminated polyimide oligomer and trinitriloacetonitrile. The composition has a retarded cure rate, thereby facilitating the fabrication of void-free molded objects and composites.

Abstract: A composite prepreg material comprising a carboxy-terminated polybutadiene, an epoxy novolak resin, a carboxylic acid accelerator and an epoxy catalyst. When reinforced with well known reinforcing fibers or filaments, the material is eminently suitable for use in the fabrication of structural composites.

Abstract: Particulate additives for increasing the modulus of thermoplastic matrix materials used in making fiber reinforced composites is disclosed. Finely divided filler materials, such as silica, titania and silicon carbide, having particle sizes about 1 to 5 microns, is added to thermoplastic resin powder to increase the modulus properties, especially in compression, of the resulting matrix without materially changing any of the otherwise advantageous properties of the thermoplastic material.