Primerless for Polycarbonate
Chemistry: GR-653LP-P is a methylpolysiloxane
Water white solution
Thermal - Per one of the schedules below in a forced air oven.
85°C - 5 hours
100°C - 2-3 hours
125°C - 45 minutes
135°C - 20-30 minutes
100 percent using crosshatch scotch tape adhesion after one hour
Abrasion Resistance: Excellent to "0000" steel wool (mild pressure).
Packaging: Five gallon, UN1A1 polyethylene drums with
Storage: GR-653LP-P is sensitive to conditions under which it is stored.
When stored at 40&#deg;F and below, it
will be stable for more than six months.
GR-653LP-P presently used to coat polycarbonate without the use
of a primer.
Lenses - safety, opthalmic, sunglass
Visors - safety
Also - gauge faces, appliance and computer parts
The GR-653LP-P is applied for dip, flow, spin or spray coating.
The percent solids, viscosity and solvents will be varied
according to the geometry of the part's surface, area, length of
run, film thickness desired, etc. Generally, dip coating is done
at 30 to 35 percent solids at one to eight inches per minute
withdrawal rate, spin coating 25 to 30 percent solids and spray
coating at 18 to 23 percent solids. Final film thickness will vary
between four and eight microns. Contact the Glass Resin Technical
Manager at (419) 873-2091 for specific recommendations.
50 percent or less.
The material should be continuously cycled through filters if
possible or if not, filtered immediately before application. One
to five micron cotton or P.E. wrapped cartridge filters are
commonly used. Filter housings are 316 or 304 stainless steel or
Materials or Construction:
304 or 316 stainless steel for pumps, filters and tanks with
polyethylene or polypropylene for tanks and lines.
A typical dip coat system consists of a solution tank,
recirculating pump, reservoir,
filter, chiller and hydraulic table with variable speeds for
changing dip rates. The tank, mounted on the hydraulic table,
overflows on all four sides so there is no drying of the
hardcoat in the tank. The GR-653LP-P
returns a constant 50 to 55&#deg;F
temperature. The GR-653LP-P is then pumped through the filters and
into the tank again, generally through a manifold o the bottom of
the tank which provides precise circulation eliminating dead
Completely cured GR-653LP-P is resistant to most solvents.
The GR-653LP-P will, however, be attacked by strong bases and
solutions containing HF.
Please call for a list of custom coaters who can apply
GR-653LP-P coating for prototyping, preproduction or small and
large production runs. For smaller volumes, using a custom coater
is much more cost effective than setting up a coating operation.
A list of suppliers who can supply either individual items or a
turnkey operation is available.
If you don't find what you're looking for,
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