Constant UV protection with NANOBYK® UV absorber

NANOBYK® UV absorbers based on cerium oxide or zinc oxide remain stable and provide long-lasting protection.

 

Surfaces that are exposed to direct sunlight are damaged by UV radiation. Organic compounds such as dyes, pigments, binders, or polymers are destroyed.

Conventional UV absorbers do not offer any long-term solution to this problem, as they degrade over time with the effect of the sunlight and lose their efficiency. Inorganic NANOBYK® UV absorbers, by contrast, remain stable and provide long-lasting protection.

BYK supplies NANOBYK® UV absorbers as READY-TO-USE dispersions and thus provides each user with simple and safe access to nanotechnology.

Nanoparticles Non-volatile matter
(%)		 Nano­particle content
(%)		 Liquid carrier Particle size D50
(nm)		 Recommended for Applications
Aqueous systems Solvent-borne systems
NANOBYK-3810 Cerium oxide 23 18 Water 10 X Architectural coatings (wood care)
NANOBYK-3812 Cerium oxide 47 30 Aromatic-free white spirits 10 X Architectural coatings (wood care)
NANOBYK-3820 Zinc oxide 45 40 Water 20 X Architectural and furniture coatings, wood stains
NANOBYK-3821 Zinc oxide 44 40 Meth­oxy­pro­pyl­ace­tate 20 X Solvent-borne wood, furnituer and industrial coatings
NANOBYK-3840 Zinc oxide 44 40 Water 40 X Architectural and furniture coatings, wood stains
NANOBYK-3841 Zinc oxide 44 40 Meth­oxy­pro­pyl­ace­tate 40 X Solvent-borne wood, furniture and industrial coatings
NANOBYK-3842 Zinc oxide 44 40 Aromatic-free white spirits 40 X Architectural coatings (wood care)
NANOBYK-3860 Zinc oxide 55 50 Water 60 X Architectural coatings (wood care)

Typical usage level: 2-6% additive (as supplied) based upon resin solids.

Optimal dosage of UV absorbers depends on coatings thickness.

Thin films require higher dosages whereas for thicker films lower dosages are sufficient.

All UV absorbers can be used in combination with radical scavengers (HALS).