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Rubber Coatings

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.

Rubber Adhesives

Sometimes two or more layers of Rubber or 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 rubber. Even substrates that are typically difficult to bond are
activated and attached by this means.
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
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 - Rubber

Oil/fuel resistance, chemical resistance, lubricity,
UV/Ozone resistance, wear resistance, temperture
resistance, adhesion to  other materials, etc

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,
adhesive.

The Mechanism of Chemical Grafting Rubber

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.
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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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