Bayer MaterialScience has announced development of new radiation-curing polyurethane dispersions free of solvents for maintaining a long-term polished look in devices like cell phones, MP3 players and laptop housings. The company wishes to repeat the success of such coatings in wood and furniture markets. Accordingly, the company has unveiled Bayhydrol® UV XP 2689, which creates highly crosslinked molecular structures through curing by UV radiation leading to exceptional resistance to hydrolysis and cosmetics. As per the company, the coatings are not only hard but also scratch and abrasion resistance.
Bayhydrol® UV XP 2689 PU dispersions perfectly suit applications like clear coats to plastics for leveling out any surface roughness of the basecoat, thereby ensuring a very gleaming new-like finish. In addition, they can be used as one-coat systems to produce an opaque metallic effect. With the second new binder, Bayhydrol® UV XP 2736, coatings can be formulated for application to plastic film, fabric and other flexible substrates, where they offer excellent adhesion and mechanical resistance. In particular, XP 2736 can also be used in combination with other UV-curing dispersions to increase the flexibility and elasticity of the resultant coating.