CREATING TOMORROWS SOLUTIONS
PYROGENIC SILICA I COSMETICS
HDK
Personal Care and Cosmetics Factbook
WELCOME TO THE WACKER FAMILY
OF PERSONAL CARE AND COSMETICS
PRODUCTS
HDK
is a registered trademark of
Wacker Chemie AG.
WACKER has been producing and
refning its brand of HDK
pyrogenic
silica for over 40 years. Our integrated
manufacturing protocols, statistical
process control and highly efficient
reactor dynamics produce excep-
tionally pure grades of inorganic,
pyrogenic silica. These grades are
especially well-suited for personal
care and cosmetics applications.
Fascinatingly Versatile
Although HDK
pyrogenic silica is an
established and highly successful product,
WACKER continues to push forward with
its R&D to seek new potential solutions
to further boost product performance
and quality. The exclusive selection of
both hydrophobic and hydrophilic HDK
grades ofers highly versatile and com-
prehensive solutions for a wide range
of personal care and cosmetic appli-
cations.
APPLICATION FIELDS OF HDK
IN PERSONAL CARE AND COSMETICS
HDK
in Personal Care and Cosmetics
Lipstick/lip gloss Up to 2 % by weight
Hair care products (bleach, dyes, shampoo) Up to 4 % by weight
Creams and ointments Up to 4 % by weight
Aerosol antiperspirants Up to 8 % by weight
Pressed powders (make-up) Up to 10 % by weight
Gels Up to 7 % by weight
Nail varnish/lacquer Up to 4 % by weight
Tooth pastes (gels) Up to 10 % by weight
Foundations Up to 6 % by weight
Creams/sun care Up to 6 % by weight
THE BASIC PYROGENIC SILICA REACTION
PROCESS PURITY OF THE HIGHEST CLASS
4
Isolated primary particles do not exist as individual units outside the fame
Particle diameter 5 50 nm 100 500 nm >> 1 m
1,200 1,500 C
SiCl4 + 2H2 + O2
SiO2 + 4HCl
SiO
2
SiO
2
SiO
2
SiO
2 Air
HDK
pyrogenic silica formation in a fame
Reactor Molecules Protoparticles Primary particles Aggregates Agglomerates
HDK
is produced at multiple sites by
an integrated, efcient and environ-
mentally compatible process that saves
energy and raw materials.
Hydrophilic HDK
with a Large
Surface Area
The production parameters are re-
sponsible for the excellent properties of
hydrophilic, pure and odorless HDK
.
Pyrogenic silica is formed by hydrolysis
at over 1,000 C. This is achieved by
introducing chlorosilanes into an oxyhy-
drogen fame, producing SiO
2
primary
particles about 550 nanometers (10
9
m)
in size. In the fame, the primary particles
fuse together permanently to form large
units, or aggregates (1001,000 nm in
size). That is to say, individual primary
particles only exist in the reaction zone
itself.
On cooling, the aggregates mechanically
entangle to form agglomerates, known
as tertiary structures. The aggregates
have sizes in the range of microns. HDK
has a very high specifc surface area
(BET) because of the small diameters of
its primary building blocks. The primary
particles that are fused together in the
aggregates fnally arrange themselves
into agglomerates. This inherently large
surface area-to-mass ratio causes
intense interparticulate interactions,
which are the result of attractive disper-
sion and dipolar forces. And that is
precisely the reason for the outstanding
properties of HDK
.
HDK
PYROGENIC SILICA
PRODUCT RANGE
5
Standard Grades
Specific Surface Area Hydrophilic HDK
Hydrophobic HDK
[m
2
/g] Undensed Densed Dimethylsiloxy Trimethylsiloxy Polydimethylsiloxy
~ 50 HDK
D05
~ 100 HDK
C10 HDK
C10P
~ 130 HDK
S13 HDK
S13P HDK
H13L
~ 150 HDK
V15 HDK
V15P HDK
H15 HDK
H17
~ 200 HDK
N20,
HDK
N20ST,
HDK
N20 Pharma
HDK
N20P HDK
H20 HDK
H20RM,
HDK
H2000
HDK
H18
~ 300 HDK
T30 HDK
T30P HDK
H30 HDK
H30RM
~ 400 HDK
T40 HDK
T40P
INCI Names of HDK
Products According to PCPC (former CTFA):
INCI Names HDK
Grades
Silica HDK
N20 HDK
T30
Silica dimethyl silylate HDK
H15 HDK
H20 HDK
H30 HDK
H18
Silica silylate HDK
H2000
Within the complete HDK
product port-
folio, selective grades correspond to
personal care and cosmetic application
requirements.
HDK
EXCELLENT AS A PERFORMANCE
MODIFIER FOR OPTIMUM QUALITY
Thixotropy
HDK
helps a liquid to reduce viscosity
under the influence of shear and to
recover viscosity when the shear is
removed
Thickening
HDK
helps increase the viscosity of
a liquid by its addition
Free-fow
HDK
helps in the movement of dry
powders / particles by reducing the
cohesion of particles
Anti-sag
HDK
helps a liquid or semisolid paste
to remain where applied and to resist
flow and levelling
Anti-settling
HDK
helps a liquid to have all of its
components remain in suspension and
not to striate or settle non-uniformly
during shipment and storage
Flow and leveling
HDK
helps a liquid when applied to a
surface to spread uniformly across the
available space
Filler/diluent
HDK
helps as an inert ingredient in
a formulation while expanding the
space available for active ingredients
Lubricant
HDK
helps as a spacer to improve
release properties and/or to separate
materials during processing
Binder
HDK
helps maintain the structural
strength of materials compacted
during manufacturing
Glidant
HDK
helps enhance the uniform flow
and mixing of materials
Sorbent
HDK
helps as a moisture scavenger
to maintain and improve free flowability
of the materials to which it is added
6
Specialty Uses Standard Uses
HDK
CERTIFIED QUALITY
GRAS
Pyrogenic hydrophilic silica is generally
regarded as safe material according
to FDA 182.90.
ReACH compliance status
Herewith we confrm that HDK
is in
compliance with the EC Regulation
1907/2006 (REACH).
HDK
was successfully registered in
the silicon dioxide substance group
according to the REACH regulation on
the registration, evaluation, authoriza-
tion and restriction processes for chemi-
cal substances. This was announced
by the European Chemicals Agency
ECHA in mid-March 2009.
Compliance Cosmetic Directive
HDK
complies with Regulation 1223/
2009 (recast of the Cosmetic Directive
76/768/EC and all its amendments).
The product neither contains any of
the restricted compounds included in
Annex III as per recipe nor are any CMR
cat. 1 or 2 compounds intentionally
introduced.
COLIPA
Herewith we confrm that we registered
for HDK
H20 all uses listed on COLIPAs
use mapping.
Food
Hydrophilic HDK
grades may be used
as direct food additives in accordance
with EU-Directive 95/2/EC.
Kosher
HDK
N20, HDK
T30, HDK
H15,
HDK
H20, HDK
H18 grades are
Kosher certified for use in Kosher
milk and meat products.
Halal
Hereby it is certifed that hydrophilic
HDK
which is approved for direct and
indirect food contact according to the
relevant Directives such as the German
BfR Recommendation LII Fillers, the
European Directive 2002/72/EC and
the US Code of Federal Regulations
(e. g. 173.340, 182.1711 and others)
meets the criteria of Halal.
HDK
is a fully synthetic product that
does not contain any Haram sub-
stances.
7
CONSISTENCY AND PURITY
Typical analytical data of HDK
Trace element impurities
element Measured levels
(mg/kg)
element Measured levels
(mg/kg)
Ag < 2 K < 2
Al < 2 Mg < 2
As < 2 Mn < 2
Ba < 2 Mo < 2
Bi < 2 Na < 2
Ca < 2 Ni < 2
Cd < 2 Pb < 2
Co < 2 Sn < 2
Cr < 2 Sr < 2
Cu < 2 Ti < 2
Fe < 2 Zn < 2
Ge < 2 Zr < 2
Hg < 1
Total < 20
Inorganic impurities
element Measured levels
(mg/kg)
Cl < 100
Standard tests:
BET surface area
Sieve residue
pH in a 4 % aqueous dispersion
Typical general properties:
Tap density: approx. 40 grams/liter
Loss on drying
(2 hours at 105 C): < 1.5 %
SiO
2
content: > 99.8 %
Analytical methods for elements:
Flame AES and ICP
< indicates the detection limit
has been reached The fgures are only intended as a guide and should not be used in preparing specifcations.
PERFORMANCE PROPERTIES AND
CHARACTERISTICS
HDK
pyrogenic silica has a wide
variety of uses in cosmetics and
personal care products. From
lipstick to shampoo, HDK
pyro-
genic silica can greatly help
improve the versatility and per-
formance of your products.
efects
HDK
has wide uses in cosmetics
and personal care products for its
variety of specific properties.
Rheology control
HDK
increases viscosity and imparts
thixotropy. As a gelling agent, HDK
modifes the viscosity of oils, waxes
and emulsions.
Sedimentation and separation
HDK
delays or prevents settling
of pigments and powders
(in suspensions).
In creams, lotions, lipstick and
foundation products, HDK
improves
stability and structure.
HDK
stabilizes formulations by
reducing sensitivity to temperature,
electrolytes and pH.
Free-fow and anticaking additive
HDK
improves the free-flow of
powders.
Applications
Color Cosmetics
In foundations, eyeliners und mascara,
HDK
regulates consistency,
controls viscosity and prevents the
agglomeration of color pigments.
Powders
HDK
enhances the free flow of
powders.
Nail lacquers
HDK
assures uniform distribution
of pigments, reduces sedimentation
and allows rheology control.
Lipsticks
HDK
acts as a thickener and
improves the consistency of lipsticks.
HDK
facilitates the uniform distribu-
tion of pigments and enhances thermal
stability.
Antiperspirants
HDK
stabilizes suspensions, prevents
the agglomeration of active ingredients
and ensures their uniform distribution;
it increases the viscosity of creams and
sticks; either hydrophilic or hydrophobic
HDK
can be used.
8
PACKAGING
Pallets with Paper Bags
HDK
is available in multilayer valved
paper bags which contain 10 kg of
product. The bags are delivered on
pallets which are shrink-wrapped with
a polyethylene foil to protect the HDK
against moisture. This allows the
product to be stored without any
moisture uptake. If the shrink foil is
damaged or single bags are removed,
care must be taken to protect the
remaining bags/individual bags against
moisture by either wrapping in plastic
or other appropriate measures.
Palletized and shrink-wrapped for
good product protection, storage
and handling
Three-ply paper for added strength
Bags are disposable
Big bags
The big bag solution is available for most
HDK
grades, a woven polypropylene
bag containing 150200 kg of product,
depending on the respective bulk density
of the product. Big bags are delivered
on a pallet shrink-wrapped with a poly-
ethylene flm to protect against moisture.
9
EXPERTISE AND SERVICE NETWORK
ON FIVE CONTINENTS
All figures are based on fiscal 2012.
Sales and production sites, plus 20 technical
centers, ensure you a local presence worldwide.
WACKER is one of the worlds leading
and most research-intensive chemical
companies, with total sales of 4.63 billion.
Products range from silicones, binders
and polymer additives for diverse industrial
sectors to bio-engineered pharmaceutical
actives and hyperpure silicon for
semiconductor and solar applications. As
a technology leader focusing on sustain-
ability, WACKER promotes products and
ideas that offer a high value-added
potential to ensure that current and future
generations enjoy a better quality of life
based on energy effciency and protection
of the climate and environment. Spanning
the globe with five business divisions,
operating 24 production sites, WACKER is
currently active in over 100 countries. The
Group maintains subsidiaries and sales
offces in 29 countries across Europe, the
Americas and Asia including a solidly
established presence in China. With a
workforce of 16,300, WACKER sees itself
as a reliable innovation partner that
develops trailblazing solutions for, and in
collaboration with, its customers. WACKER
also helps them boost their own success.
Our technical centers employ local
specialists who assist customers world-
wide in the development of products
tailored to regional demands, supporting
them during every stage of their complex
production processes, if required.
WACKER e-solutions are online services
provided via our customer portal and as
integrated process solutions. Our
customers and business partners thus
beneft from comprehensive information
and reliable service to enable projects
and orders to be handled fast, reliably
and highly effciently.
Visit us anywhere, anytime around the
world at: www.wacker.com
double_A4_e_200313.indd 1-2 20.03.13 14:28
EXPERTISE AND SERVICE NETWORK
ON FIVE CONTINENTS
All figures are based on fiscal 2012.
Sales and production sites, plus 20 technical
centers, ensure you a local presence worldwide.
WACKER is one of the worlds leading
and most research-intensive chemical
companies, with total sales of 4.63 billion.
Products range from silicones, binders
and polymer additives for diverse industrial
sectors to bio-engineered pharmaceutical
actives and hyperpure silicon for
semiconductor and solar applications. As
a technology leader focusing on sustain-
ability, WACKER promotes products and
ideas that offer a high value-added
potential to ensure that current and future
generations enjoy a better quality of life
based on energy effciency and protection
of the climate and environment. Spanning
the globe with five business divisions,
operating 24 production sites, WACKER is
currently active in over 100 countries. The
Group maintains subsidiaries and sales
offces in 29 countries across Europe, the
Americas and Asia including a solidly
established presence in China. With a
workforce of 16,300, WACKER sees itself
as a reliable innovation partner that
develops trailblazing solutions for, and in
collaboration with, its customers. WACKER
also helps them boost their own success.
Our technical centers employ local
specialists who assist customers world-
wide in the development of products
tailored to regional demands, supporting
them during every stage of their complex
production processes, if required.
WACKER e-solutions are online services
provided via our customer portal and as
integrated process solutions. Our
customers and business partners thus
beneft from comprehensive information
and reliable service to enable projects
and orders to be handled fast, reliably
and highly effciently.
Visit us anywhere, anytime around the
world at: www.wacker.com
double_A4_e_200313.indd 1-2 20.03.13 14:28
Wacker Chemie AG
Hanns-Seidel-Platz 4
81737 Mnchen, Germany
Tel. +49 89 6279-1741
info@wacker.com
www.wacker.com
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The data presented in this brochure are in accordance with the present state of our knowledge, but do not absolve the user from carefully checking all supplies immediately upon receipt.
We reserve the right to alter product constants with the scope of technical progress or new developments. The information given in this brochure should be checked by preliminary trials
because of conditions during processing over which we have no control, especially where other companies raw materials are also being used. The information provided by us does not absolve
the user from the obligation of investigating the possibility of infringement of third parties rights and, if necessary, clarifying the position. Recommendations for use do not constitute a warranty,
either express or implied, of the ftness or suitability of the product for a particular purpose.
