| | | | | | | | | | | | | | | | |
|
|
| Sunscreen Technologies |
| Balanced UV Protection |
| The UV Balance Concept was developed in order to ensure protection from both UVB and UVA Rays. This concept suggests for every 3 units of UVB protection, there is also 1 unit of UVA protection. Kobo has developed both UV Balance Powders and Dispersions that are the right combination of particle to achieve a 3:1 ratio. |
| Balanced UV Protection Flyer
Using TiO2 and ZnO for Balanced UV Protection presentation |
| View List of Recommended UV Balance Products and Download MSDSs & Specs |
| Non-Nano TiO2 and ZnO |
| Kobo Products offers a new range of Titanium Dioxide and Zinc Oxide, where the particles contain at least one dimension greater than 100nm and show a substantial amount of particles over 100nm when measured by generally accepted methods including TEM and/or Light Scattering. These Non-Nano TiO2 and ZnO are available coated with either organic or inoganic surface treatments. |
| Non-Nano TiO2 & ZnO Flyer |
| View List of Recommended Non-Nano TiO2 & ZnO Products and Download MSDSs & Specs |
| Attenuation Grade TiO2 & ZnO (Powder Form) |
| TiO2 |
| Attenuation grade
TiO2 often
has a size of less than 100 nm.
Surface coated TiO2 with a
primary particle size of 15 nm and 35 nm are widely used for UV protection nowadays. TiO2 with a primary particle size of 10 nm is the latest development in TiO2 technology. They can be ground into finer particle and give higher UVB protection and better transparency. Attenuation grade TiO2 treated with crosspolymer treatment are now available for an easier dispersion in a wide variety of carriers. |
| View List of Recommended Attenuation Grade TiO2and Download MDSDs & Specs |
| ZnO |
| Because of the relatively lower reflective index, ZnO of a large size can be used in a formula without causing significant whitening. Nonetheless, ZnO of smaller size will give a better transparency, more UVB protection and, in general, more UVA protection when ZnO powder is used directly in a formula. |
| View List of Recommended Attenuation Grade ZnO and Download MSDSs & Specs |
| High Solids® and High SpeedTM Dispersions |
| Kobo Dispersion Technologies |
| Attenuation grades of Titanium Dioxide or Zinc Oxide are dispersed to achieve the highest possible percent solids and then milled to a specific particle size. These Dispersions provide high transparency and SPF or yield an optimal efficacy against both UVA and/or UVB. |
| TiO2 Attenuation Grade Dispersions |
|
As a sunscreen agent, attenuation grade titanium dioxide with much smaller
primary particle sizes than pigmentary grade
TiO2 must be used
to minimize skin whitening. These very small primary particles tend to aggregate more than
ten fold and powders supplied frequently contain aggregates over one micron.
Therefore, proper grinding is necessary.
With optimal grinding conditions, smaller primary particle (10-15nm) size
TiO2
always provides better transparency and UVB protection while
TiO2 of a larger primary
particle (35nm) size will give a better UVA protection. Therefore, the selection of
TiO2 will be based on the
SPF and PFA values intended for the finished formula, as well as use level. Surface activity of attenuation grade TiO2, either its photo-catalytic activity or chemical activity towards other ingredients like vitamin C and Avobenzone in the formula, must be considered. Larger size TiO2 has a smaller surface area and also can be readily coated, making the particle very stable. Surface treating micronized TiO2 has been show to make it less reactive. Kobo offers High SpeedTM Dispersions, fluid and ultrafine dispersions for higher UV protection and easier use. Attenuation Grade TiO2 Dispersions Flyer |
| View List of Recommended Attenuation Grade TiO2 Dispersions and Download MSDSs & Specs |
| ZnO Attenuation Grade Dispersions |
| Zinc Oxide is used in cosmetics primarily as a skin protectant and for UV attenuation. They are grades
of different primary particle sizes available between 25 and 120 nanometers. The degree of
aggregation is a function of the primary particle size and manufacturing process, similar to the case with
TiO2.
When properly ground, the ZnO with smaller primary particle will give better transparency and better
attenuation of both UVA and UVB. However, due to its low refractive index, the whitening of ZnO is less
of a concern, especially when the use level is under four percent. In in-vitro studies, larger size
ZnO was found to score a higher critical wavelength than finer ZnO but gives lower PFA when
tested in-vivo. This is a great concern in the USA where a PFA testing method has yet to be
officially adopted.
Attenuation Grade ZnO Dispersions Flyer |
| View List of Recommended Attenuation Grade ZnO Dispersions and Download Specs & MSDSs |
| Volatile Non-D5 Dispersions |
| Due to current trend to move away from volatile cyclic silicone products,
Kobo has developed both TiO2
and ZnO Dispersions in various Volatile Non-D5 carriers.
These Volatile Non-D5 Dispersions have properties that are better than or equivalent to D5 Dispersions Attenuation Grade Volatile Non-D5 TiO2 & ZnO Dispersions Flyer |
| View List of Recommended Volatile Non-D5 Dispersions and Download MSDSs & Specs |