Resin industry prime

The various types of resin have been discussed above. However, the listings for these materials have been categorised to indicate their prime usage in the industry and have been assigned according to the manufacturers classification ... 

The xylenes are very high-lonnage industrial chemicals and are raw materials or intermediate materials for numerous synthetic fibers, resins, and plastics. See also Xylene Polymers. A large amount of p-xylene goes into polyester fiber production, while substantial quantities of d-xylene are consumed by the manufacture of phthalic anhydride. The prime source of xylenes are petroleum refinery reformate streams in conjunction with benzene and toluene extraction. The xylenes occur mixed in these streams. 

Electrodeposition (EE ) has proved to he a most attractive process for industrial coating, in particular for the priming of automobile bodies. Epoxy resins play a leading role in this field, nearly 6 % of all epoxy resins sold for coatings being used in ED systems. 

The coating industry has met these problems with blends of alkyds and heat-reactive amino resins. With such vehicles, adequate performance can be achieved through baking cycles of 30—40 min at temperatures of 250—300°F. In general, where initial color and color retention are the prime requisites, nondrying alkyds are most widely used. 

Virgin—a resin that is in the original state as it was first packaged by the resin supplier. While it may be a prime or off-spec resin, it has not been reprocessed in any way. It is the industrial equivalent of a consumer buying something brand new in the box. Many applicahons require the use of virgin resin (Figure 3.19). 

Resin modifications can occur in the original production facility where the resin was first polymerized, but they can also be modified at a later date at a different facility. Some modifications can even be performed on the factory floor, just prior to, or during, the processing of the resin into production parts. However, the most common method of modification is via compounding. There is an entire industry built around this process. Compounders typically buy generic prime resin from a distributor, and then modify it with various additives— usually to create a specific amount of material for a specific customer order. 

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