Bayer Aktiengesellschaft

Strabag Bau-ag

Lothar Preis

Rudolf Schmidt

Wulf Von Bonin

Ulrich Von Gizycki

Johannes Blahak

Martin Weiser

Bernhard Kotulla

Rolf Dhein

Gerhard D Wolf

Henning Giesecke

Manfred Schreckenberg

Harold Ebneth

Eberhard Born

Rolf Forster

Jurgen Faltin

Jurgen Hoffmann

Manfred Dahm

Hans Magg

Hans Muller

Robert Becker

Gerd Goldmann

Dieter Jehle

Hans Haas

Kurt Rompf

Josef Esser

Lightweight composite material which contains reinforcing fibres in a thermoset matrix and has been obtained by providing voluminous three-dimensional structures of reinforcing fibres more than 50 mm long, which are in the form of a knitted fabric or loop fabric with a hollow space content of at least 50 vol. %, with a thermosetting resin such that the lightweight composite material contains hollow spaces.

Lightweight composite material with a thermoset matrix

A process for the production of profiles from composite fibrous materials, wherein the strands of fibrous materials continuously impregnated with liquid reaction resins are wrapped or braided immediately after impregnation or in a prehardening zone with drawn and/or preoriented and/or textured organic fibres or monofils or mixtures of organic and inorganic fibres or monofils and are hardened in a following hardening zone.

Profiles of composite fibrous materials

Interpenetrating polymer networks prepared from 60 to 99.9% by weight, of a thermoplast and 0.1 to 40% by weight of a thermosetting resin which comprises:

Thermosetting cyanate resin and the use thereof for the production of

A lightweight construction with sandwich elements consisting of core and covering surfaces may be produced in that high-strength hollow profiles are fixed to a molded frame at a spacing from each other, the remaining space around the hollow profiles is filled with a pressure-resistant casting compound which supports the profiles, and the top layers which determine the bending resistance of the elements are applied thereto. In this manner multidimensionally curved covering surfaces of unlimited size, such as the bodies of boats, can be economically produced.

Lightweight constructions of increased strength and dimensional stability

Polyurethane-based matrix materials are made by reacting a phenol which is at least bifunctional with an aromatic isocyanate which is at least difunctional in the presence of 1-40 wt. % soft segment former. The soft segment former is a compound containing long chain aliphatic groups having at least six carbon atoms in the aliphatic group, an isocyanate-reactive group and a molecular weight of from 800 to 10,000. From 90 to 130 equivalent percent of isocyanate groups (based on the total of isocyanate-reactive groups present in the phenol and soft segment former) are employed. These matrix materials are particularly useful in the production of composite materials and as adhesives.

Matrix materials and a process for their preparation

This invention relates to a thermosetting resin of either (a) at least one polycyanate and (b) at least one polyester polyol or of (c) a prepolymer of (a) and (b) and to the use thereof for the production of composite materials and of interpenetrating polymer networks (IPNs).

A fabric reinforced composite having increased bond strength between impregnating resin and polyaramide reinforcing fabric and method for making the composite including using metal coated polyaramide fabric as the reinforcing material. The metal is deposited by a non-electrical method.

Reinforced composite comprising resin impregnated metallized polyaramide

The sucker rod system in a deep well sucker rod pump consists of a plurality of unidirectionally reinforced composite fiber rods extending substantially parallel but not in contact with each other, the cross-sectional area of which rods is less than 1 cm.sup.2. This enables the advantageous material properties to be utilized to a high degree. The sucker rod system can be assembled on site. The individual composite fiber rods can be monitored when they are in the working position.

Sucker rods

Elastomers reinforced with fibrous composite materials and having improved properties are obtained if the strengthening means used are composite materials based on reinforcing fibres and reactive resins which are coated with adhesion promoters based on polyisocyanates.

Reinforcing agents for elastomers, the production of reinforced

An anchorage for a rod of fibrous composite material includes sleeve having a bore receptive of a rod, the bore being profiled substantially perpendicularly to the axis of the received rod and an element for widening the received end of the rod. The cross section of the bore is substantially similar to the cross section of the rod to be received, substantially constant along the length of the bore and greater than the non-widened cross section of the rod. A sealing compound completely fills the space between the rod, the widening element and the sleeve.

Anchoring element for fibrous composite materials

By using a packer which is pushed as far over an anchor as the intended length of the moulding, the cavity in a borehole in the region of the bond can be completely filled with a reactive resin. Overhead work is possible even with slowly reacting resins. By using a catalyst on the packer, the reactive resin injected into the borehole behind the packer can be made to harden very rapidly.

Anchoring of tension members

Carbon filaments and fibres and sheets manufactured from them which have excellent properties of adherence to plastics without loss of tensile strength are obtained when the carbon filaments and fibres are provided with a metal coating by a current-less process.

Metallized carbon fibres and composite materials containing these fibres

By fitting cores in unidirectionally reinforced composite fibre material articles, it is possible to utilize their high tensile strength in the fibre direction far more because they can be anchored better without special outlay. The cross-section of the cores have to change in the fibre direction and it is important that the fibres run in a clinging fashion on the core and that it is completely embedded therein. The composite fibre material articles provided with cores can be produced continuously. The central region of a glass fibre bundle widens in an impregnation bath, the core inlay is introduced into this region and the fibres are then pressed against the core.

Composite fibre material articles with inlays and a method of producing

The outer skin of armored earthwork constructions is attached to bands and the traction is transmitted to the ground by friction. The bands are made of a corrosion resistant, high strength weave or netting of reinforced organic, glass or carbon fibres or fibre mixtures and are preferably impregnated with liquid reaction resins such as epoxide, polyurethane or isocyanate resins. It is advantageous to impregnate the bands and then to harden them only after they have been laid.

Growing community of inventors

Bergisch-Gladbach, Germany

Lothar Preis