Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Other

Pirelli Cavi E Sistemi S.p.a.

J&ouml;rg Bauer

Monika Bauer

Christian Dreyer

Norbert Keil

Crispin Zawadzki

J&uuml;rgen Schneider

Huihai Yao

Hartmut Kr&uuml;ger

Peter Kurzmann

Heinrich Flegel

Christoph Uhlig

Jens Neumann-Rodekrich

Michael Herrmann

Peter Becher

Michael Hirthhammer

The invention describes a fast curable system for the preparation of amine modified thermosettings containing triazine groups, the system comprising at least one polyfuctional organic monomeric or prepolymerized cyanate and at least one primary or secondary amine, wherein the amount of amine is selected such that the molar ratio of cyanate radicals to amine radicals is from 95:5 to 50:50, and optionally additional additives, characterized in that the amine is present in a form having a blocked or decreased reactivity which can be reactivated without reacting it with a chemical participant of reaction. Further, it is directed to amine modified thermosetting materials containing triazine groups as well as to a method for preparing same.

Quick-setting mixtures and kits with polyfunctional cyanates and amines, the thermosets produced therefrom and methods for the production thereof

An adhesive system for forming reversible adhesive bonds includes at least one polymeric adhesive component comprising at least one of polyurethanes, polyureas, or epoxy resins and at least one additional component that includes a functional group that can be activated by the introduction of energy, such that a chemical reaction with the adhesive component takes place involving a partial breakdown of the adhesive component. Reversible bonding of articles and controlled parting of an adhesive bond between articles can be achieved with the adhesive system.

Adhesive system for form reversible glued joints

The present invention relates in general to optical waveguide devices, which preferably are planar, e.g., optical arrayed waveguide gratings (AWGs), multiplexers/demultiplexers, optical add/drop multiplexers and the like. More particularly, the present invention provides integrated optical waveguide devices having central wavelengths (or channel wavelengths) which are temperature insensitive in that they do not or do almost not shift upon temperature variations in the environment. Such devices are also called athermalized or athermal devices. Preferably, most or all parts of such devices including waveguides, cladding material and the substrate itself consist of organic polymeric materials. The devices of the invention substantially remedy the problems encountered with the limitations and disadvantages of common devices as known in the prior art.

Temperature insensitive optical waveguide device

The present invention is directed to wave guide systems or structures or parts thereof, characterized in that they consist of or comprise a resin composed of at least one polycyanate copolymer, obtainable by copolymerization of at least one specific difunctional cyanate with at least one monocyanate of the formula N&equiv;&mdash;C&mdash;O&mdash;R, wherein R is a straight or branched non-aromatic hydrocarbon radical or a non-aromatic hydrocarbon radical comprising a cyclic structure, the radical having the formula C(R&prime;) &mdash;CFR&Prime; wherein each R&prime; is, independently from the other, hydrogen or fluorine or an optionally substituted, preferably fluorinated alkyl or alkenyl group, and each of R&Prime; may independently be defined as R&prime; or may have an arylic structure.

Waveguide systems or structures or parts thereof, containing polycyanate copolymers prepared from polyfunctional cyanates and fluorinated monocyanates

Growing community of inventors

Senzig, Germany

Jörg Bauer

Growing community of inventors

Senzig, Germany

J&ouml;rg Bauer

Jörg Bauer