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Letter to Alain Forest, Cont'd Page 2
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<br />UV and Thermal Stabilization
<br />When supplied as product code HD 6601.29, the resin is stabilized with a very robust
<br />antioxidant additive package to protect the resin in storage and during the injection molding process
<br />at recommended temperatures. Additionally, the resin is stabilized with UV inhibitors to protect the
<br />finished product from degradation when exposed to solar radiation. The current formulation is rated
<br />to offer a minimum performance of UV-15, representing a standard industry protocol that is
<br />translated as "retention of 50% (min) of original tensile elongation after continuous exposure to
<br />15,000 hours of simulated UV radiation". For this test standard ExxonMobil uses Xenon Weather-0-
<br />Meter with irradiation setting of 0.35 Watts per square meter and UV bulb emitting at 340 nm wave
<br />length.
<br />The additive formulation of HD 6601.29 is considered proprietary to ExxonMobil and we are
<br />therefore not at liberty to disclose any specific information about the additives used. ExxonMobil has
<br />ongoing research and development relationships with leading suppliers of UV additive chemistry and
<br />we believe to be at the leading edge of stabilization additives for polyolefins.
<br />Note that Imperial Oil uses a hot melt compounding process to add their additive package to
<br />the HD 6601.29 product.
<br />Other Rego nition
<br />HD 6601 has been tested by the Underwriters Laboratories and is recognized under QMFZ2
<br />for flammability class 94 Horizontal Burning. You may reference www.ul.com for verification under
<br />file number El 17534 listed for ExxonMobil Chemical Canada.
<br />I trust this meets with your requirements. If additional information is required, please do not
<br />hesitate t6 contact me.
<br />Sincerely,
<br />Ron Cooke
<br />Research Associate
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