>>Dernières Actu

 PnP a été retenue pour participer au Projet Européen : AEROMUCO avec EADS 

 Dr K.ZAHOUILY est été nommé depuis 2011 Expert Européen à REA ( Research Executive Agency ) à Bruxelles. 

 PnP Participe au Projet Orail II ( pour l'insuline Orale) PnP est membre depuis 2009 D' Oseo Excellence " parmi les 2000 entrepreneurs qui vont de l'avant" 

 Dr K.ZAHOUILY a été a été promu par le Ministre de la défense EN 2010 " chevalier de l´Ordre national du Mérite" La médaille lui a été remise par le Professeur Jean-Marie LEHN Prix Nobel de Chimie.

>> Reportages
Emission Un projet, Une équipe diffusé sur la chaine M6.
UV Curing , Matériaux Photopolymères
société de chimie innovante...
Hybride PDF Print E-mail

Hybrid One of the most important potential applications of the resins PHOTOCURABLE is the protection area of three-dimensional objects of large size by high wear, such as vanish finishing automotive bodywork. It's a market that is far superior to all current UV-curing applications. Compared to thermosetting vanishes based on solvent that require cooking to 130° C for 20 minutes, the UV vanishes have the advantage of issuing far fewer volatile organic compounds (no solvent) and greenhouse gases (low energy consumption during the ultra-fast curing at room temperature). Furthermore, their mechanical properties (scratch resistance and abrasion) are superior to those currently employed thermosetting vanish.

So far two main factors have prevented the development of UV technology in this industry:

  •  insufficient holding of UV vanishes to photoaging, a problem that we have recently solved (see below); 

  • the absence of hardening of the resin in the UV shadow of three-dimensional objects of complex form, which creates corrosion points.

To resolve this problem, Prof. Dr. C. Decker and Dr K. ZAHOUILY developed in 2000 in collaboration with BASF and DuPont, hybrid resins that harden by both UV irradiation and a short heating to 130° C. These "dual-cure" implement the photopolymerization of acrylic resins and multifunctional crosslinking by thermal polycondensation of isocyanate and alcohol groups. Two types of dual cure systems were investigated:

  •  an acrylic oligomer téléchélique carrying hydroxyl functions associated with a triisocyanate (DuPont);

  •  an acrylic oligomer téléchélique carrying isocyanate functions associated with a triol (BASF).

Thus, the photopolymerization is growing rapidly in both systems, the thermal curing in shadow areas is more effective in the first type of resin. In this way, it succeeds to ensure effective protection and sustainable development of the whole structure tridimensionnal treated.

It should be noted that the same type of resin dual-cure "has been successfully used for crosslinking in depth pigmented lacquers and paints of thick (200 m), it was not possible to achieve with Classical UV resin. However, the polycondensation of isocyanate and alcohol groups occurs slowly already at room temperature, which reduces the life of the formulation and requires to operate according to the Two-mode.

In addition, this rich deep expertise Photon & Polymers, is currently developing formulations Inkjet efficient dual-cure with excellent adhesion and better resistance to abrasion on the support so far hardly used for inkjet applications.