Document dYVvo27Zd3GJeEKvbJeYeyyXB

CHEMICALS AND PLASTICS d to Dr-; T_ /AT 'k'&fcP TO (NAME) i rtMPANV I.mlATION Mr. C. E. Bowman TEXAS CITY PLANT oat* P, O* tox 471, TCXAt CITY, TEXAS 775 March 1, 1968 KECEIVBD MR 6 1968 K-N. VWtr ' OPV TO Mr. J. H. Barrett euajacT Mr. W. H. Bauer - 525 Dr. J. J. Brezinski - 511 Mr. 0- T. Carlisle Mr. A. J. Costantln - 312 Mr. F. A. De Melio - 312 Mr. J. H. Field Mr. J. L. Hockersmith Mr. F. L. Johnson/Mr.W.D.Bush Mr.' D. E. Richardson/Mr.K.L.Meisner Mr. R. N. Wheeler - 51^ "" Mr. W. E. Whitehurst - 511 Total Pore Volume vs Dryblending Time The attached data includes the total pore volume and dryblending times of three ethylene modified QSAN-7 autoclave samples and one competitive PVC counterpart, Geon 102EPF1. These dryblending times were determined using the UCC standard test method WC-324-A. Two plasticizers were used in the dryblending --Flexol 10-10, the standard plasticizer, and a more viscous plasticizer, Flexol 13-13, which is frequently used in high tem perature wire coating compounds. The total pore volume of these samples, as determined by the mercury extrusion porosimeter, was furnished by Dr. J. J. Brezinski of the South Charleston Development Laboratory. The data suggests that a difference of 0.05 cc/gram, total pore volume as shown between Geon 102EPF1 and the best QSAN-7 dryblend resin in this series, D21-3-27, is significant. A dryblend difference of 7.3 minutes was obtained between the two samples using Flexol 13-13- The effect of total pore volume is also shown between QSAN-7 samples D21-3 -27 and D20-6-32 and between samples D24-6-34 and D20-6-32. Pore volume dif ferences between these samples are approximately 0.04 cc/gram. Although none of the UCC resins evaluated in this series are considered competitive for critical dryblending applications (Flexol 13-13), the data would Indicate that a total pore volume of approximately 0.37 cc/gram Mr. C. E. Bowman -2 March 1, 1968 must be achieved to produce an acceptable resin for such critical dry blending applications. While ethylene modified QSAN-7 from autoclave run D21-3-2? approaches the desired pore volume, autoclave to autoclave variability, and subsequent resin blending, would lead to the conclusion that the total pore volume of Process-7 resin is relatively poor. The desired high level of porosity must be achieved uniformly each autoclave batch and protected in subsequent downstream processing steps. Please advise of additional work desired. JWF/ab J. W. Fields UCC 041867 # TABLE I Resin Type QSAH-T QSAN-T QSAN-T GEON Autoclave UCC Dryblend Run No. w/Flexol 10-10 D24-1-34 7.0 at 84C D20-6-32 7.0 at 84C D21-3-27 6.0 at 87C 102EPF1 5.1 at 86C UCC Dryblend w/Flexol 13-13 W.N.D.* 24.5 at 88C 16.7 at 87*C 9.4 at 86C Total Pore Volume cc/fcram 0.24a 0.28a 0.322 0.374 *Would not dry ucc 041868