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Application Fields
XBH STRUKSILON 8026 is used as a
silicone surfactant for the production of polyurethane shoe
sole systems as well as other microcellular foams. It is
especially recommended for shoe sole formulations based on
polyester and blends of polyether/polyester polyols. XBH
STRUKSILON 8026 was specifically developed to offer excellent
performance in high as well as low density systems.
Additionally, XBH
STRUKSILON 8026 can be successfully applied in pour-in-place
systems, PUR spray formulations and in a variety of continuous
laminated boardstock formulations.
Chemical and
Physical Properties
According to its
chemical structure XBH STRUKSILON 8026 is a polyether modified
polydimethyl siloxane resistant to hydrolysis.
XBH STRUKSILON 8026 is a clear,
colourless to slightly yellow liquid of middle viscosity, has
strong surfactant properties and is miscible with water at
room temperature.
General Chemical
Structure
Typical Properties
Viscosity at 25°C mm2/s 350
Density at 25°C kg/m3
1,071
Flash Point (DIN/ISO
2562)
°C
>
100
Refractive Index at 25°C
1,454
Technical Properties
XBH STRUKSILON
8026 was specifically designed to be used in shoe sole and other
microcellular systems. It is mainly recommended for polyester
and polyester/polyether blend based formulations.
XBH STRUKSILON
8026 offers an excellent regular and fine cell structure and a
good skin formation. Even in low density foams skin defects and
voids on or slightly under the surface can be avoided. Very low
shrinkage will be observed even at short demould times using low
density formulations.
Due to this
outstanding performance XBH STRUKSILON 8026 is recommended as a
wide density range silicone surfactant for all polyester polyol
based shoe sole applications in formulations from 0,34 g/cm³
to 0,58 g/cm³.
Performance Test
Results:
Test objective:
The test was
carried out as a comparison test of XBH Struksilon 8026 and two
reference materials. The comparison material A is a silicone
surfactant mainly recommended for high density shoe sole
systems. Comparison B is a surfactant mainly recommended for low
density shoe soles.
The major task
was to compare the influence of the surfactant on the cell
structure, the skin formation and the general processing of the
systems.
Higher density:
The test for
higher density was carried out in a standard polyester polyol
based system. Demould densities of 0,56 g/cm³
were obtained.
General results:
All three surfactants showed an excellent skin formation, a fine
cell structure and excellent processing.
Lower density:
For the
production of the lower density foams a standard shoe sole
system with a demould density of 0,36 g/cm³
was chosen.
Test formulation:
polyester polyol linear, adipic acid based, OH-value =
56 mg KOH/g 83,23
monoethyleneglycol 13,9
triethylenediamine 33,3%
triethylenediamine in MEG 2,05
water H2O 0,55
silicone silicone surfactant 0,27 100,00
parts
prepolymer 20% NCO 132 parts
free rise density:
0,21 g/cm³
demould
density: 0,38 g/cm³
Processing:
prepolymer temperature: 60°C
polyol
temperature:
55°C
mould temperature: 50°C
demould
time: 3,5 min
The tests were
carried out using a standard low pressure mixing device.
With all three materials a demould time of 3,5 min was
reached.
Skin formation:
The comparative
silicone surfactant A mainly recommended for higher densities
showed voids and
skin defects in the majority of the produced samples.
For XBH STRUKSILON 8026 no skin defects were observed.
Dimensional
stability:
None of the samples showed a shrinkage of more than 2%.
Cell
structure:
SAXOL STRUKSILON
8026
Comparison
B Comparison A
 
XBH STRUKSILON
8026 exhibits an excellent fine cell structure. Comparison B
offers an almost identical cell structure, while comparison A
shows coarse and irregular cells
Results
XBH STRUKSILON 8026 is an excellent wide density range
silicone surfactant for shoe sole systems. The product allows
to make shoe soles characterised by excellent cell structure,
very good physical properties as well as improved processing
in both, high and low density shoe sole systems.
Recommended Dosage
Usually, XBH
STRUKSILON 8026 is applied in quantities of 0.1 to 1.0 php
(parts on 100 parts polyol). We recommend to adjust the
optimum dosage to the corresponding formula. However, a
concentration of 2 php should not be exceeded.
Product Safety and
Handling
XBH STRUKSILON 8026 is not a
hazardous material for the purposes of hazardous materials
regulation.
Further information
regarding safety, toxicology, special properties of the
product, transport and storage are given in the safety data
sheet.
Packaging, Storage
and Transport
Storage
stability 12 months in closed original containers if
transported and stored at temperatures between 1 and 30°C.
Packaging 200 kg drums 1000 kg containers
(IBC)
This information is
based on our present knowledge and experience. The values
given are not intended to prepare specifications. Our
technical advice and recommendations whether verbal, in
writing or by way of trials do not absolve the customer, on
account of the many outside influences which may affect the
product use and application, from their own testing and
trials. A legally binding assurance based on information
contained herein regarding particular properties or the
suitability for definite customer applications cannot be
assumed. The customer bears the responsibility for the
observation of possible patent and trademark rights in
addition to relevant laws and regulations relating to the
products.
If you don't find what you're looking for,
Contact Us.
We may have a suitable product that's not listed, or we may be
able to develop a material to fit your specific needs.
Tel : (02)2217-3442 / Fax : (02)2704-4070
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