UniversitÉ De Haute-Alsace

Elkem Silicones France Sas

Ahmad Ibrahim

Xavier Allonas

Jean-Marc Frances

Christian Maliverney

Perrine Theil

Guillaume Pibre

Céline Croutxé-Barghorn

Matthieu Retailleau

The present invention concerns type II photoinitiators for the free-radical crosslinking of silicone compositions, in particular acrylic silicone compositions. The present invention concerns a silicone composition C1 that can be crosslinked by exposure to radiation with a wavelength of between 300 and 450 nm, comprising: &#x2014;at least one organopolysiloxane A comprising at least one methacrylate group bonded to a silicon atom, at least one organohydrogenopolysiloxane H comprising at least two, and preferably at least three hydrogen atoms each bonded to different silicon atoms, and&#x2014;at least one free-radical photoinitiator P. The present invention also concerns the provision of a silicone composition that can be polymerized or crosslinked by free-radical process comprising a type II photoinitiator system suitable for crosslinking silicone compositions, in particular by exposure to radiation, and absorbing light radiation with a wavelength greater than 300 nm.

Free-radical photoinitiators and uses of same in silicone compositions

A system and method for forming a silicone composition C that is crosslinkable by exposure to radiation with a wavelength between 200 nm and 450 nm, having:

Type II photoinitiator system and method for forming crosslinking silicone compositions

The present invention relates to a silicone composition C that is crosslinkable by exposure to radiation with a wavelength between 200 nm and 450 nm, comprising:

Type II photoinitiator system and method for crosslinking silicone compositions

Some embodiments relate to a dual cure polymerization system combining aza-Michael addition polymerization and photopolymerization. Some embodiments also relate to a dual cure polymerization system for preparing interpenetrating polymer networks. Some other embodiments relate to compositions and articles obtainable by a process of the invention and uses thereof.

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Mulhouse, France

Ahmad Ibrahim