Covestro (netherlands) B.v.

Sabic Global Technologies B.v.

Saudi Basic Industries Corporation

Mark Pepels

Johan Franz Gradus Antonius Jansen

Maria Soliman

Kangtai Ren

Paulus Antonius Maria Steeman

Johannes Peter Antonius Martens

Huimin Cao

Xiaosong Wu

Adrianus Cornelis Bastiaan Bogaerds

Robert Duchateau

Guido Joseph Elisabeth Hensen

Renate Tandler

Described and claimed herein are radiation curable compositions for coating an optical fiber, particularly primary coating compositions, wherein the composition possesses specified liquid glass transition temperatures, and/or viscosity ratios between, e.g., 25° C. and 85° C. Such compositions possess preferably high amounts of a reactive oligomer component with a backbone not derived from polypropylene glycol, preferably reactive oligomers with select diisocyanate constituents, one or more reactive diluent monomers, a photoinitiator, and optionally, one or more additives. Such compositions also are preferably sufficiently viscous at room temperature to ensure optimum optical fiber coating processability. Also described are methods of coating the radiation curable compositions elsewhere described, and the fiber optic coatings resulting therefrom.

Radiation curable compositions for coating optical fiber and the coatings produced therefrom

The present invention is directed to water-swellable, radiation curable compositions suitable for use in coating water-blocking fibers, such as optical fibers. The present invention is further directed to fibers, including optical fibers, which are coated with water-swellable exterior coatings that are configured to buckle and detach from the associated fiber to facilitate superior performance in longitudinal water-blocking testing. Also claimed and described are methods of applying such water-swellable coatings to optical fiber coatings. Further claimed and described are buffered bundles of fibers including at least one optical fiber that is coated with a water-swellable, radiation curable coating to ensure superior longitudinal water blocking performance.

Water-blocking systems including fibers coated with liquid radiation curable SAP compositions

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Echt, Netherlands

Mark Pepels