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r r om : BLUE LINE TECHNl G IES 530 671 5208 01/ 203 18:10 , 289 P-002/005 � •ra ` ,,,;�; ..•.:.�.......� � � � r!, ;�iil:,t l� li li r� 11 t ; I ..... �...� .,,,.. i III. t I• t C H N O L o a I E 8 Chemical Resistance Analysis Summary; In this study it was our objective to look at the materials used in most of the fittings we act in the potrolourn market cwTendy. It was obeorved that there are some significant problems with most of the entry fittings used in the petroleum fittings market. Two problems are most significant. It was determined in our study that Natural and Nitrile Rubber elastomers generally have good chemical and water resistance but poor resistance to the deteriorating effects of ozone and aromatic hydrocarbons, Nitrile rubber is heavily used in this application and this ozone issue is the reason we Soo such widespread failure in boots constructed of this type of material, We looked at both the effects of inunorsion tests as well as ozone exposure and found that there really aren't any Nitrile rubber formulations that demonstrate a good resistance to ozone or hydrocarbons. The second major issue is the effects of water on Estano 58300 olastomer. Though each different olastomor demonstrates differing properties, the general effect is a poor resistance to water especially when the temperature is raised to 100 degrees F. In general we found that polyurethanes were the best choice for this application duo to there roslstance to chemicals, water, ozone, and hydrocarbona, but in the case of Estano the potential effects of water• were significant as demonstrated in our support material, It was Important in doing this evaluation that we look closely at the major causes of the failures we have seen and at the overall general physical property changes that occurred to those various materials when exposed to a variety of different fuels and conditions, In general if we observed a significant physical property change in the material after exposure then we concluded that the material was likely to suffer degradation as a result of loug term exposure to water, fuels, and ozone, Nitrilo, Alcryn, and Bstane all demonstrated weaknesses in some areas. It is also Important to point out that physical property loss seems to be accelerated once there begins to be some change caused in the material, making it difficult to pinpoint the exact causes, Our recommendation is that we use Pollethane for all Hluelins fittings, Ilia is the only product family that demonstrated strong rosistwice to physical property change after oxposure to orals and water as well as having the ozone and hydrocarbon resistance inheront in most of the urethane family of elastomors, Although the data we compiled on the Pellethane 2102was excellent, Dow Chemical recommends that we use their latest Pellethane technology (2355-75) as It has additionally improved upon its water and Mel resistance properties, It has also proven this point in our in house tasting, Blueline Technologies Confidential 6/5/02