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Thursday, 01 October 2020
Raw materials & technologies, Technologies, UV/EB Coatings

Automotive industry sees a very clear light in the development tunnel

Wednesday, 28 August 2013

UV-clear coats can now be regarded as starting formulations to adapt the mechanical and adhesion properties to the existing automotive coating systems on the market. A novel crosslinking additive is the reason.

Dr. Marc Entenmann, IPA is well known in the coatings world. He won already the European Coatings AWARD 2011

Dr. Marc Entenmann, IPA is well known in the coatings world. He won already the European Coatings AWARD 2011

Novel crosslinking additive for chemical resistant UV-curable clearcoats

Allyl-functionalized triazines, especially "Taicros" were used as crosslinking additives in novel UV-curing clear coats. Dr Marc Entenmann, Fraunhofer IPA, Germany evidenced that this is a key component in the radiation curing formulations.

It has a positive effect on important properties like

  • acid- and alkaline resistance,
  • adhesion,
  • hardness
  • and scratch-resistance.

The UV-curing clear coats were protected by the addition of hindered amine light stabilizers (HALS), as well as UV-absorbers and applied on state of the art OEM systems, consisting of e-coat, primer surfacer and base coat layers.
UV- developments in Metal, Plastic and Automotive

During the last years UV-curing has gained more and more access to metal and plastic substrates.

The session number 3 in Basel on Tuesday afternoon, 15 October 2013 at the RadTech conference covers a wide and interesting range of applications in these fields. Besides Dr Marc Entenmann at 16.10 h, new formulations will be presented for direct-to-metal as well as for plastic substrates and automotive systems.

Resins and crosslinkers with different types of chemical structure and new approaches for initiating systems will be discussed. The last presentation shows how modern analytical methods can be used to characterize and systematically influence the properties of UV-curing coatings.

Further UV programme about adhesion, photoinitiating systems and developments in coatings

The short contact time of the UV cured products at room temperature leads to challenges in the development of optimal adhesion to substrates. The presentations of the session 2 "Adhesion and adhesives" deal with new developments for adhesives as well as improvements in achieving adhesion to difficult substrates.

New approaches of photoinitiating systems, deep and basic studies of photopolymerization reaction or breakthrough chemistries will be discussed in the "Advances in Photochemistry and Polymerization"- sessions (nr 1 and 4)

Several ways to improve the final coatings properties, including especially the water resistance, through the use of specific components and the optimization of the physico-chemical properties of the coating will be described and discussed in Session Nr 6 and 12 "Developments in Formulations & Coatings I and II"

Absolute new ideas around additives and oligers as well as latest equipment standards

Presentations of the "Innovation Session-New Chemistries" deal with new components, oligomers or additives that help UV technology to grow, day by day, and to continue to be an environmental friendly technology.

The relationship between the UV energy delivered to coating and its effect on the curing process will also be covered during RadTech conference. Another important factor is delivering a stable, reliable process and presentations will cover this aspect from the UV lamp system and external monitoring systems - and will be discussed in the session on "Developments in UV Curing Equipment and Process Control"

The session "Innovations – New Applications" builds the bridge between chemistry and technology to open a variety of new UV applications – already capturing the market or developing the future.

EB curing and graphic arts make the circle of curing light developments perfect

A versatile, low-Cost EB lab unit will be presented by Ian Bland, Comet, Switzerland in Session Nr 5 "EB processing"

The use of energy curable inks, coatings and laminating adhesives in the graphic arts is still growing. Especially flexible food packaging applications, where conventional applications dominate, is the growth potential high. The latest developments here are covered in the session "Graphic arts"

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