Bayer Aktiengesellschaft

Harold Ebneth

Gerhard D Wolf

Henning Giesecke

Rudolf Merten

Kirkor Sirinyan

Hans G Fitzky

Hans-Georg Fitzky

Uwe Claussen

Lothar Preis

Wolfgang Oberkirch

Wulf Von Bonin

Hans Sattlegger

Siegfried Klipfel

A mild and simple process of activating substrate surfaces for the purpose of currentless metallization comprises using organometallic compounds of elements of the groups 1B and 8 of the Periodic System of Elements whose organic moiety has at least one functional group over and above the groups required for binding the metal are used for activation.

Process for activating substrate surfaces for electroless metallization

The present invention relates to intumescent polysiloxane molding compositions containing expandable graphite compounds and, if appropriate, additionally nitrogen-containing phosphates.

Intumescent polysiloxane molding compositions

A simple and mild method of activating substrate surfaces for currentless metallization involves activating by means of organometallic compounds of elements of the 1st and 8th sub-Groups of the Periodic Table of Elements in which the organic moiety consists of oligomeric, prepolymeric or polymeric compounds containing double bonds.

Organopalladium-II-complex compounds

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

Metallized, particularly nickel-coated, knitted net fabrics are suitable for protecting the eyes against microwave radiation with very little adverse effect upon the field of vision, particularly when the mesh width of the knitted net fabrics amounts to &lt;0.25 .lambda., preferably &lt;0.1 .lambda., .lambda. being the wavelength of the radiation to be screened off at the upper frequency limit.

Use of metallized knitted net fabrics for protection against microwave

The firmly adhesive metallization, in particular partial metallization, of the surface of semiconductors is possible, without pickling, by carrying out the activation with organometallic compounds of metals of the I and VIII Secondary Groups of the Periodic Table of Elements, then reducing in a conventional manner and metallization without current.

Surface metallized semiconductors

A carbon fibre or aramid fibre fabric in a matrix of thermoset plastic is coated first with a thin layer of nickel, then with a highly conductive second layer, and on the outside once more with nickel. If the metals are deposited under wet-chemical currentless conditions, the flexible fabric will be electrically highly conductive. The composite material is particularly suitable for lightning and NEMP protection.

Lightning protection composite material

Process for activating substrate surfaces for currentless metallization

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

The firmly adhesive metallization, in particular partial metallization, of the surface of semiconductors is possible, without pickling, by carrying out the activation with organometallic compounds of metals of the IB and VIIIB Groups of the Periodic Table of Elements, then reducing in a conventional manner and metallizing without current.

Process for the production of metallized semiconductors

A composite material comprising a polymer matrix containing metallized sheet-form textiles and/or metallized particles, and in addition additives for increasing the ohmic, electrical and/or magnetic losses which are uniformly present in the polymer and/or on the sheet-form textiles and/or particles, has a high shielding effect against electromagnetic radiation both in the short-range field and also in the long-range field over a wide frequency range.

Composite material for shielding against electromagnetic radiation

Metallized sheet-form textiles of synthetic polymers or natural fibres to which a metal layer has been applied by wet-chemical currentless deposition are particularly suitable for screening electromagnetic waves in the range from 10 MHz to 1000 GHz. Since the textile properties are substantially unaffected by the metallization, the sheet-form textiles are particularly suitable for use in the medical and communications fields. A multiple-layer construction with insulating intermediate layers and surface linings may be useful, for example in the screening of relatively low frequencies.

Metallized sheet form textile microwave screening material, and the

Metallized sheet-form textile materials of synthetic polymers or natural fibres, to which a metal layer has been applied by currentless wet-chemical deposition, are particularly suitable for use as reflectors for electromagnetic waves in the range from 10 MHz to 1000 GHz. In the case of stretched metallized fabrics, the reflecting radiation is partly polarized which can facilitate or improve the recognition of an object by radar beams. By periodically stretching and relaxing the fabric, it is even possible to modulate the reflected microwaves.

Metallized sheet form textile material and method of making same

This invention relates to a process for increasing the abrasion and water resistance of metallized cloth by applying a coating containing free isocyanate groups and, optionally by an additional coating which process renders the textile materials suitable for use in the production of objects which can be detected by radar.

Growing community of inventors

Leverkusen, Germany

Harold Ebneth