Silicones for Prosthetics (PDF | 856 KB) - Wacker Chemie

hEALThcArE I PrOSThETIcS
SILIcOnES fOr
PrOSThETIcS
crEATIng TOMOrrOW‘S SOLuTIOnS

AS fAScInATIngLy vErSATILE
AS ThE huMAn bOdy
Silicone Elastomers from
WAckEr – Performance
next to the Skin
The human body is a wonderful work
of art and highly complex piece of
engineering. When it is necessary to
provide support or artificial replacements
for particular physical functions
in the human body, or to promote
healing, WACKER silicones convince
with a customized range of products
and services.
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All products in the medical silicone sector
have one thing in common – they come
into intimate contact with the human
body, where they enhance quality of life
by providing support in terms of functionality
and aesthetics. That is why the
materials must satisfy such rigorous demands.
WACKER silicone rubbers meet
this challenge with high compatibility and
excellent reliability.
Our product program is impressive due
to its remarkable scope of applications.
Individual service and personalized
consultancy also play an important role
at WACKER.

ELASTOSIL ® –
for Manufacturing
Mammary Prostheses
Step 1
• The mammary prosthesis consists of a
thin shell (e.g. PUR) filled with silicone gel
Step 4
• The shape of the prosthesis is set using a
negative mold
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Step 2
• The use of thermoplastic shell material
makes it possible to shape prostheses
individually
• The shell is comparable to a bag with
a feeding channel
Step 5
• ELASTOSIL ® gel begins curing at room
temperature
• The process can be accelerated by heat
input (approx. 70° C - 130° C)
Step 3
• The shell is filled with ELASTOSIL ® gel
Step 6
• The prosthesis is then demolded and
packed

Silicone rubbers,
customized for
Prosthetic Applications
Reliable Performance in the
Prosthetic Industry
Our silicones are used in many prosthetic
applications, ranging from the manufacture
of functional prostheses for fingers, hands
and partial-foot prostheses to the production
of orthoses, epitheses and external
breast prostheses, to liners and face
masks, tailored to fit the wearer perfectly.
WACKER offers tailored solutions for the
medical industry’s special requirements.
Our product ranges comprise ready-touse
grades. Not only can their hardness
be varied, but their consistency adjusted
from spreadable to fluid. We have also developed
customized solutions for special
applications.
ELASTOSIL ® RTV-2 Silicone Rubber Grades for Prosthetics
RTV-2 Systems Make
the Difference
Various silicone-rubber systems are used,
depending on the specific prosthetic application.
The addition-curing grades are
formulated as two-component systems:
A and B. The platinum catalyst is separated
from the crosslinker. After components
A and B have been mixed, the mixture
cures to an elastomer.
The main difference between RTV-2 silicones
and other standard silicone types
(such as LSR or HTV) is a lower processing
viscosity, which results in very good
pourability. The vulcanizate hardnesses
range from very soft (Shore 00) to hard
(Shore A), and can be widely varied.
The pot lives and curing times of our
ELASTOSIL ® grades can be adapted,
making these grades suitable for standard
manufacturing processes. They can
be applied in a number of ways such as
molding, brushing or dipping. After mixing,
RTV-2 silicone rubbers start curing at
room temperature; this process can be
accelerated by increasing the temperature
(e.g. 70° C - 130° C).
Blending Viscosity Viscosity Final Final Tensile Elongation Tear resistance
ratio Component A Component B hardness hardness strength at break ASTM D 624 B
Shore A Shore 00 ISO 37 ISO 37
ISO 868 ASTM 2240
Designation A : B [mPa·s] [mPa·s] [N / mm²] [%] [N / mm]
ELASTOSIL ® P 7600 1:1 4,000 2,000 < 0 26 1.0 600 1.5
ELASTOSIL ® P 7613 1:1 12,000 12,000 15 - 2.1 400 3.2
ELASTOSIL ® P 7670 1:1 1,800 1,800 7 55 1.8 600 2.1
ELASTOSIL ® P 7671 1:1 1,800 1,800 < 0 18 0.5 400 1.5
ELASTOSIL ® P 7676 1:1 1,500 1,500 < 0 15 0.6 500 1.0
ELASTOSIL ® P 7684 / 40 1:1 2,000 3,000 < 0 40 2.0 600 6.0
ELASTOSIL ® P 7684 / 60 1:1 2,000 3,000 12 60 3.0 600 13.0
ELASTOSIL ® P 7683 / 25 1:1 1,400 4,000 < 0 25 1.0 500 2.0
ELASTOSIL ® P 7683 / 47 1:1 1,600 1,600 7 47 2.4 470 7.0
ELASTOSIL ® P 7915 1:1 kneadable kneadable 17 70 1.2 550 5.0
ELASTOSIL ® P 7950 1:1 kneadable kneadable 50 - 2.4 250 7.0
ELASTOSIL ® PK 16 1:1 3,500 4,000 < 0 18 1.0 850 3.0
These figures are intended as a guide and should not be used in preparing specifications.
ELASTOSIL ® is a registered trademark of WAckEr chemie Ag
hand prosthesis
Liner for leg prosthesis
Mixing the components
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Silicone gels for
External Mammary
Prosthetics
External Mammary Prostheses Made
of Soft Silicone Gels
The products used in external mammary
prosthetics must meet very specialized
demands. We have therefore developed
our RTV-2 silicone gels in close cooperation
with manufacturers.
The results are impressive: ELASTOSIL ®
silicone gels can be adjusted to any desired
softness, color and resilience. They
offer all advantages of RTV-2 silicone
grades. Silicone gels are superior to other
materials because they provide a natural
feel and look. We also offer silicone gels
for “lightweight” prostheses to reduce
the weight of the silicone for the wearer.
These gels are less dense and therefore
their inherent weight is reduced.
The Advantages of ELASTOSIL ® P
• Low viscosity
• Easy to meter, thanks to its non-critical
mixing behavior
• Homogenization quality during mixing can
be easily monitored because the components
are differently colored
• Adheres perfectly to polyurethane film
• Provides a natural look and feel
ELASTOSIL ® RTV-2 Silicone Gels for External Mammary Prostheses
Blending Viscosity Viscosity Pot life
Gel time Penetration, hollow cone
ratio Component A Component B at 23° C at 70° C 62.5 g for 5 sec.
Designation A : B [mPa·s] [mPa·s] [h] [min] [1 / 10 mm]
ELASTOSIL ® P 7616-160 1:1 350 1,400 > 6 22 160*
ELASTOSIL ® P 7616-195 1:1 350 1,200 > 4 12 195*
ELASTOSIL ® P 7618 1:1 50 300 > 6 15 220
ELASTOSIL ® P 7619 2:1 100 1,250 > 6 22 200
ELASTOSIL ® P 7628 1:1 8,000 8,000 0,5 3 192; density (0.62 g / cm³)
ELASTOSIL ® P 7630 1:1 8,000 8,000 0,5 3 220; density (0.62 g / cm³)
ELASTOSIL ® P 7633 1:1 6,500 6,500 > 2 > 60 240; density (0.67 g / cm³)
ELASTOSIL ® P 7636 1:1 8,000 8,000 4 10 258; density (0.76 g / cm³)
* hollow cone of 25 g, 5 sec.
These figures are intended as a guide and should not be used in preparing specifications.
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Wacker Chemie AG
Hanns-Seidel-Platz 4
81737 Munich, Germany
Tel. + 49 89 6279-0
info@wacker.com
www.wacker.com/silpuran
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 on receipt.
We reserve the right to alter product constants within the scope of technical progress or new developments. The recommendations made 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 fi tness or suitability of the product for a particular purpose.
6365f e /10.12 supersedes 6365f e /11.11