Stress test of vinyl plasticizers shows
Σ-. -«^îrtta», · u ».it
less polystyrene crazing with Eastman Polymeric Plasticizer NP-10 Crazing and staining of polystyrene surfaces in contact with compounded polyvinyl chloride can be virtually eliminated by using Eastman Polymeric Plasticizer NP-10. In the test illustrated above carefully molded and cured polystyrene strips were subjected to external stress on an elliptical clamp. To magnify the effect on polystyrene resulting from its contact with plasticized vinyl compound, various plasticizers were poured directly on the strips and allowed to remain for 24 hours, or until fracture occurred. The photograph shows the results and pointedly illustrates the relative inertness of Eastman Polymeric Plasticizer NP-10 on polystyrene surfaces.
Eastman
CHEMICAL
Polymeric Plasticizer NP-10 exhibits permanence characteristics equal or superior to those of high-molecularweight plasticizers, yet, being itself a compound of moderate molecular weight, blends in easily and rapidly. It is highly resistant to hydrolysis. Its loss from vinyl films to hydrocarbons, soapy water and activated charcoal is extremely low. It is odorless, tasteless, colorless, non-toxic and provides good low-temperature flexibility. Eastman Polymeric Plasticizer NP-10 is an ideal primary plasticizer for vinyl applications such as refrigerator door gaskets, automotive trim... or 'wherever maximum permanence is essential.
P R O D U C T S , I N C . , K I N G S P O R T , TENNESSEE, subsidiary of Eastman Kodak Company
S A L E S O F F I C E S : E a s t m a n C h e m i c a l P r o d u c t s , I n c . » Kingsport, Tennessee; New York City; Framingham, Massachusetts; Cincinnati; Cleveland; Chicago»; Houston; St. Louis. W e s t C o a s t : Λ Α / Ι Ι β ο η M e y e r C o · · San Francisco; Los Angeles; Portland; Salt Lake City; Seattle. M A R C H
3 1,
1958
C&EN
113
