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Advanced Polymer Solutions  has fine-tuned a unique process
of chemical grafting which allows manufacturers to permanently
add or improve the performance of a material while retaining its
existing characteristics. This process involves substrate
activation, and the attachment and polymerization of monomers
that contribute the desired properties onto the backbone of the
substrate using safe, effective organic chemicals. Because a
covalent bond is formed, the molecularly bonded formulation is
permanent and cannot be leached, even under severe conditions

Grafted Properties
Human hair, skin and teeth
Slow release, increased comfort to skin, hydrophilicity,
hydrophobicity, fungicidal / bactericidal properties, etc.

All materials used will conform to all OSHA, EPA and if required
FDA standards


The Mechanism of Chemical Grafting
APS substrate activators have the unique capacity of removing
active hydrogens from substrates and initiating the growth of
polymer chains at that site. By removing these hydrogens, an
electron is removed forming a free radical. This free radical site
needs an electron to stabilize its state and will share the electron
with the present monomers forming the chemical bond. Following
represents the four step reaction of APS' chemical grafting
process using M to represent a metal substrate (carbon steel,
stainless steel, copper, bronze, brass, etc.):

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 special formulation
ingredient so that all reactive components are exhausted.

Our Specialized Services
Each project is treated on an individual basis by formulating the
desired coating, additive or adhesive according to specific
requirements. Because of its easy adaptation to a wide variety of
applications, chemical grafting has been utilized in virtually every
industry including automotive, aerospace, industrial machinery,
consumer products, medical, packaging, and many others. In
order to obtain the chemically bonded product, new formulation
are applied to the submitted substrate and tested according to the
recommended procedures dictated by industry standards and
manufacturer's requests. Once 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.
Applications

Coatings
Used to improve the functional properties of a substrate on its
surface. Conventional coatings adhere to materials by simple
mechanical forces which can be easily broken causing peeling
or delamination. Such is not the case with chemical grafting
since the attachment of the coating is accomplished by forming
a covalent bond between the substrate and the monomers via
the substrate activator. The chemical reaction that takes place
provides subsurface penetration in addition to the chemical
bond. As a result, much thinner coatings can be obtained while
providing longer life and superior performance of the material.
Typical coating methods can be used i.e. dip, spray, roll. The
chemical grafting formulation comes in contact with the surface
of the substrate by any of these methods, The chemical
grafting reaction occurs instantaneously upon contact with the
material. The desired thickness and preferred application
method will determine the viscosity of the formulation. Most
formulations are water based. The coatings can be air dried,
however, heat (oven, IR, UV, etc.) may be used to accelerate
the drying time. Most formulations will dry in seconds to
minutes.

Additives
In certain instances, the manufacturer wishes to compound the
modification into the raw material in bulk form. Sometimes it is
desirable for the substrate activator and monomer system to
be incorporated into the matrix of the substrate. The
formulation is to be blended with the pellets or resin and will be
adjusted to the manufacturers' extruding or molding process.
Typically an add-on of approximately 1-5% is needed. In this
case, the chemical grafting reaction takes place when heat is
introduced during the extruding or molding process. Besides
the introduced modification, there is no effect on the material
or the existing processing parameters.

Adhesives
Sometimes two or more layers of various materials are
laminated together to achieve desired characteristics. A
generic adhesive used for all purpose applications may fail
especially when temperature changes occur. Again, these
conventional adhesives hold their substrates together by
mechanical means. In addition, failure of the bond will occur
during temperature fluctuations due to differences in
coefficients of thermal expansion. The adhesives developed by
APS use difunctional monomers and attach themselves to the
substrates by a helical bond. This helix allows the resultant
bond to move with the differences in the expansion and
contraction rates of the substrates. Even substrates that are
typically difficult to bond are activated and attached by this
means.
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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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