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If you manufacture a product which
contains polycarbonate and are
looking to increase the flame
resistance properties of your
product  in order to give you a
competitive edge then you need to
contact Advanced Polymer Solutions
regarding our patented
Chemical
Grafting.
We will develop a customized  
formulation based upon your
chemical resistance specifications.
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UL Testing - Flame Resistance Polycarbonate

Flammability Specifications


UL 94 Flammability Classification Tests for Plastic Materials

UL 94 is the standard applied by the American Underwriters Laboratories for the testing of the flammability and fire
safety of plastic materials used in devices and appliances. The UL 94 HB (Horizontal Burning) tests the burning of a
horizontal plastic specimen and the most demanding UL 94V (Vertical Burning) tests the burning of a vertical plastic
specimen. Precise details of the equipment, conditions and test systems to be used can be found in the UL 94
standard.
he length of the test specimen is 5" (127 mm) and width 0.5" (12.7 mm). The test sheet cannot be more than 0.5
(12.7 mm) thick. Lines are marked on the sheet at the 1" and 4" locations. The sheet is fixed horizontally at one end
and tilted 45 degrees in the direction of the width, as shown in the diagram. The burner used is adjusted so that it
forms a 1" long blue flame. The flame is directed at an angle of 45 degrees to the front edge of the plastic sheet so
that about 1/4 of the test specimen’s front edge is in the flame. The flame is applied for 30 seconds, after which it is
removed. If the test specimen burns to the 1" line before 30 seconds have passed, the flame is removed immediately.
The test is carried out on three test sheets.
flame resistance polycarbonate
Once we develop and throughly test the formulation it will become your property which can be patented under your
name. When reproducible results are secured, the formulation is adapted to large-scale production at the
manufacturer's location. To provide ongoing support, APS can
manufacture the final formulation in the desired
quantities and supply the manufacturer with a pre-mixed, ready to use coating, additive or adhesive.
Flame resistance polycarbonate formulation can be added to the resin or developed as a coating.
Chemical grafting can increase the flame resistance polycarbonate based upon your specifications.
With Ph.D. polymer chemists and a team of well trained scientists, APS is able to provide clients with expert solutions
with synthetic polymers and plastic products. Third party companies routinely use APT scientists and facilities for
out-sourced research projects.
Application Methods

Most commonly used application methods:

Coatings
Coatings are applied on the surface of substrates to
improve the functional properties and durability.
Conventional coatings need extensive surface
preparation for adhesion and need to build up
thickness for performance. Such is not the case with
APS' coating formulations. Most APS coatings can
be applied in one step with no or minimal surface
preparation. In addition, due to the chemistry of
APS' chemical grafting process, thinner coatings
can be used to achieve a higher degree of property
performance. Delamination will not occur due to the
chemical bond formed between the coating and the
substrate with some subsurface penetration
occuring through the use of molecularly small and
lightweight monomers.

Typical coating methods can be used such as dip,
spray, roll, flow coat, etc. APS coatings can be
formulated to be air dried, however, in the interest of
time, heat or some energy source (i.e., UV or
infrared lights) can be used.

Additives
APS can develop additives to incorporate into the
raw material/resin prior to extruding or molding. In
this case, the new properties will penetrate the
matrix of the material. APS chemists will adjust the
formulation to conform to the processing parameters
used by the manufacturer. Due to the molecular
bond formed by APS' process, the new properties
will not migrate and leach from the material over
time, even under severe conditions.

Laminates (Adhesives)
APS chemists have extensive experience in bonding
the same or different substrates together. Materials
that are difficult to adhere to are effectively bonded
with APS' process. Again, no or minimal surface
chemical attachment of one substrate to the other.
Consequently, substrate failure will occur before
adhesion failure. In addition, if two substrates with
different coefficients of thermal expansion are
bonded, an APS developed adhesive's bonding
action will not be affected. Such is not the case with
conventional adhesives which cannot withstand the
varying expansion and contraction of different
substrates.

Application of all APS chemical grafting formulations
can applied at ambient temperatures and normal
atmospheric conditions
The Mechanism of Chemical Grafting

Advanced Polymer Solutions substrate activators
have the unique capacity of removing active
hydrogens from substrates and initiating the growth
of polymer chains at the site. By removing these
hydrogens an electron is removed forming a free
radical. This free radical site needs an electron to
stabilize its site and will share the electron with the
present monomers forming the chemical bond. The
following represents the four step chemical grafting
process:

1)        Activation: free radical formation
substrate activator
MOH_________  MC*


2)        Chemical Bonding of monomers:
MO
(CH2 — CH)n
x        x = functional group that changes with
each monomer and determines the property


3)        Formation of small polymer side chains: n =
controlled
chain length of monomers (same or varied)


4)        The reaction is then terminated with a
specific formulation ingredient so that all reactive
components are
exhausted.

Our monomers can be added to the resin or
developed as a
coating.
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APS facility
Advanced Polymer Solutions New York
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Advanced Polymer Solutions
99 Seaview Boulevard,
Port Washington, NY 11050
(516) 621-5800 ‎
Email:info@advancedpolymersolutions.com
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Discover how your company can benefit from Chemical Grafting. Let our
Product Solution Specialists
suggest cost effective product enhancements.
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Product Solutions: Tell us about the problem you are experiencing with your material and/or process and we will
                          respond with solutions for your evaluation. Our typical response time is less then 48 hours.
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