BENTONE HYDROCLAY™
Incorporation methods
Introduction
BENTONE HYDROCLAY™ products are specialized
rheology modifiers for the aqueous phase. In order to
reach an optimal performance, proper incorporation
is crucial. The following incorporation methods will
provide best practices and insights to achieve utmost
reproducibility and formulation versatility.
Incorporation as a pure powder
When adding BENTONE HYDROCLAY™ as a pure
powder it is essential to ensure thorough mixing.
Incorporation in a glycol premix
Incorporating BENTONE HYDROCLAY™ into a formulation using the glycol premix method, is by far the most popular and easiest choice.
Personal Care Formulary
(Performance and Sensorial Modifiers for Sun Care)
Introduction
Sunscreen systems are often exposed to extreme conditions, yet must consistently deliver the active ingredient to provide uniform protection.
Elementis offers ingredients
and formulations that allow customers to
go beyond just UV protection and solve
their formulating challenges.
Benefits of BENTONE GEL®, BENTONE® LUXE & BENTONE HYDROCLAY™
Products of the BENTONE GEL® series form extremely stable W/O emulsions with the ability to create a variety of textures.
Emulsifying gels of the BENTONE®
LUXE series can additionally create cold
processable water-in-oil systems with
very high oil content, ideal for reaching
highest SPF performance.
Improved Application
When an emulsion is applied to the skin, it will ideally create a uniform layer covering the skin surface as shown below.
After application, many emulsions begin
to pool in valleys, leaving an uneven
film on the skin surface.
BENTONE HYDROCLAY ™
(
the effect of pH and Salt )
Introduction
All smectite clays create a network due to a balance of charges on and around the clay platelet. This creates an equilibrium between electrostatic repulsion and van der Waals attraction forces.
Ingredients that can alter the
charge density and distribution on smectite clays can
affect the network and either strengthen or weaken it and
ultimately potentially destroy it.
Influence of pH
The synergy
of hectorite and hydroxethylcellulose in BENTONE
HYDROCLAY™ 900 also helps to overcome challenges
in a wider range of pH systems.
Influence of Salt
Salt can affect the charge balance around clay platelets,
affecting the clay network. Figure 4 shows the influence
of salt concentrations from 0-5% on the viscosity of
dispersions of the BENTONE HYDROCLAY™ series in
water.