News:

• 24-Apr-13 13:49

  Novel light stabilisers for waterborne UV curable coatings

  UV-curable coatings require direct UV light to initiatemonomers and oligomers. It is converted from a liquid into a solid film. Speciality about the UV curing coatingsis its speed in production and faster in drying. However, most polymers are susceptible to degradation by UV and visiblelight. It requires light stabilisers to enhance the durability from sunlight degradation. To understand more about light stabilisers, they can be divided into two groups: UV absorbers(UVA) and the Hinder Amine Light Stabilizers (HALS). UVA’s function is absorbing UV light and transforming it into heat and the HALS is best known for capturing free radicals to prevent material degradation.

• 09-Apr-13 11:26

  Light Stabilizers for High UV Cut-off and Durable Optical Adhesive

  Optical pressure sensitive adhesive is widely used in optoelectronics industry, for example flat panel display, automobile, window film, etc. Therefore, optical pressure sensitive adhesive not only requires high transparency and adhesion but also needs great UV cut-off ability to prevent polymer materials being damaged by UV light from external sunlight or internal light source. In order to enhance UV cut-off capability, it is necessary to add appropriate light stabilizers into optical adhesive. Some key points have to be taken into consideration when choosing light stabilizers: (1) wide UV cut-off range (2) no migration in optical adhesive (3) transparency, haze, and adhesion of optical adhesive will not be affected. According to the items mentioned above, we choose Eversorb® 109 as key factor to design an experiment, and the results were published in Industrial Materials No. 408., To confirm the data accuracy, we use S-W test of Statistics to check sample transparency values are under normal distribution or not in this article. When all the transparency values are under normal distribution, we proceed followed by the QUV accelerated aging test. QUV test result indicated that the sample with 20 um of dry film thickness remains excellent UV cut-off ability after exposure 1000 hours under 340 nm wavelength of UV lamp, 0.89 W/m2 of exposure energy, and 60℃ of chamber temperature. It means that Eversorb® 109 substantially increase the light stability of optical pressure sensitive adhesive.

• 01-Mar-13 14:22

  Novel light stabilisers for waterborne epoxy coatings

  Environmentally friendly coatings are the trend for future development. Everlight has developed several unique products specifically for coatings. Eversorb EP-5 is a new application to prevent waterborne epoxy from UV light degradation. Coating manufacturers still need to run their own experiments to demonstrate that coatings systems are compatible.

• 06-Nov-12 14:58

  Novel light stabilisers for waterborne epoxy coatings

  Epoxy materials are used frequently in industrial coatings. Despite the advantages of these properties there is one major drawback with using epoxy materials. Discoloration1 may occur over a relatively short period of time when epoxies are exposed to ultra voilet (UV) light. Eversorb EP4, a blend of UV absorber and HALS, is developed specifically for solventborne epoxy coats.

• 25-Jul-12 10:56

  Applications of Novel Light Stabilizers for Waterborne Epoxy Coatings

  Epoxy materials are used frequently in industrial coatings. Despite the advantages of these properties there is one major drawback with using epoxy materials. Discoloration may occur over a relatively short period of time when epoxies are exposed to Ultra Voilet (UV) light radiation from indoor lightening, or natural sunlight. The clear coat containing UV absorbers and light stabilizers is commonly applied to the surface for protection. EVERSORB EP4, a blend of UV absorber and HALS, is developed specifically for solvent borne epoxy coats.