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Glass and Ceramic 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.

Glass and Ceramic 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 glass. 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  -  Glass/Ceramic

Ink adhesion, scratch resistance, shatter resistance,
permanent color, conductivity, hydrophobic
properties, etc

Our Specialized Services

Each project is treated on an individual basis by
formulating the desired coating, added to ink or
used as an 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 Glass/Ceramic

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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Applications:

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glass
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Inks

Substrate activators can be added to ink producing superior adhesion to both
glass and ceramic, in addition desirable properties such as scratch resistance
and wear resistance can be incorporated into the formulation.
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