Document 6bRrpX5k7p2MN42e96VBMD4Dg

/ ft? UC INTERNALCORNS PONDiNCI CHEMICALS DIVISION 7mMr. J. F. Erdmann Cmmfamf umNm Texas City Plant P. 0. BOX 8361, SOUTH CHARLESTON, W. VIRGINIA 25303 QrlqlmmHmt Dmpt. April 10, 1967 Research and Development Cw Dr. W. K. Asbeck, 511 Mr. R. G. Baier, 512 Dr. F. E. Bailey, 511 Mr. J. F. Burgess, 512 Dr. R. H. Harding, 511 Mr. L. P. McCartney, 511 Mr. D. E. Richardson, 515 Mr. R. H. Rehm, NY0-31 Mr. J. K. Rose, 511 CELLOSIZE Hydroxyethyl Cellulose WP-300: Texas City Plant RECEIVED A 13 1967 R. N. Wh--Ur Dear Jack Attached are the data you requested on blends of CELLOSIZE hydroxyethyl cellulose WP-300 used as suspending agents in Process Seven resin production. Table I gives volatiles, insolubles, ash, and glyoxal contents. Included also are viscosity data determined with the Hoeppler (single-point) and Haake (multi-point) viscometers. Flow curves for the 6 blends, plotted from the Haake data, are shown in Figures 1 through 6. The test procedure, using the Haake, measures solution viscosity at shear rate intervals over the range of 1.59 to 2 59 reciprocal, seconds (10 readings) and back to 1.59 reciprocal, seconds (9 readings). For CELLOSIZE HEC WP-300, four per cent solutions are used, which concentration will help to magnify any differences in flow properties between samples. CELLOSIZE HEC solutions are pseudoplastic. Even the low molecular weight grades (WP-09) will exhibit some pseudoplasticity if the solution concentration is high enough. The apparent viscosity of such solutions decreases as the shear rate increases. Some thixotropy may also be evidenced, and in this case, once sheared, a time interval is required for structure to re-build and for the original viscosity to be re-gained. ucc 041879 2- - In addition to molecular weight grade and solution concentration, the molecular weight distribution can also affect the flow properties (pseudoplasticity and thixotropy) of CELLQSIZE HEC solutions. Hence, the possibility that flow property measurements will give some idea of the molecular weight distribution of the WP-300's, which distribution could have some effect on the properties of the resins made with them. The method of reporting the HaaEe viscosity data in terms of A, B, and C values is described in Appendix A, and in Figure 1. I hope the flow-property data will be of some help in correlating results in your process. I believe the actual blend compositions may be more meaningful, and these are given in Table II. Conceivably, some minor constituent of a blend might not significantly affect solution flow properties, but might have some effect on resin particle size, or other process variables. se Attachments 2 Tables 6 Figures W, W. McGaughy ucc 041880 APPENDIX A Definition of A, B, and C Values as Determined with the Haake Rotovisco Viscometer The entire series of values determined in the Haake test is simplified by reporting three values (A, B, and C) as follows: A = Thixotropy-free viscosity, taken at 1.59 reciprocal seconds. This is the 19th (last) viscosity reading. Presumably, thixotropic structure has been predominately eliminated by the previous shear history. B = Pseudoplasticity Index, The 19th reading (low-shear viscosity) is divided by the 10th reading (high-shear viscosity) to provide a measure of the extent to which apparent viscosity drops with increasing shear. C = Thixotropy, per cent. The difference between the first and last readings (both taken at 1.59 reciprocal seconds) expressed as a per cent of the last reading. This number gives an indication of the extent to which structure is present in solutions. Pseudoplasticity and thixotropy usually increase as the molecular weight and molecular weight distribution of CELLOSIZE HEC increases. There are other variables (such as molar substitution level) tfiich can affect pseudoplasticity and/or thixotroy uec 041881 041832 TABLE I "CELLOSIZE" HYDR0XYETHYL CELLULOSE WP-300 BLENDS USED AT TEXAS CITY PLANT Blend No. Volatiles, % (when packaged) Hoeppler Viscosity, cps (20C, 2$, Dry Basis) Insolubles, % (l)Ash %, As Sod. Carbonate As Sod. Acetate Glyoxal, % Haake Viscosity Date (25C. 456 Solutions) A. Thixotropy-Free Viscosity at ^ 1.59 seconds" , cps B. Pseudoplastieity Index C. Thixotropy, % W-5039HH 4.7 310 0.01 2.7 4.17 0.31 6940 5.6 4.5 W-1037H 4.7 382 0.10 2.75 4.26 0.09 6767 4.1 0 W-1039H 4.7 378 0.03 2.7 4.17 0.14 W-1043H 4.9 337 0.03 2.3 3.57 0.13 6732 4.1 0.52 5742 3.6 1.1 (l) Ash is reported as sodium carbonate, is actually present as sodium acetate. W-1055H 4.4 391 0.04 2.1 3.26 0.12 7018 4.0 1.4 W-1065H 5.1 371 0.05 2.8 4.34 0.24 7337 5.3 1.3 TABLE II "CELLOSIZE" HYDROXYETHYL CELLULOSE WP-300 BLEND COMPOSITIONS Ji Ccofi O CO Blend Lots Grade Cps (1) 2% Amt.. % W-5039HH (310 cps) W-1023H W-1002E W-5000EE IP-40 WP-40 955 105 113 50 18 32 W-1037H (382 cps) W-1012J W-1032H W-1034H W-1038H QP-300 WP-300 WP-300 WP-300 731 173 248 514 4.3 10.7 36.3 48.7 W-1039H (378 cps) Same as W-1037H W-1043H (337 cps) W-1012J W-1032H W-1036H W-1040H W-1042H OP-300 WP-300 WP-300 WP-300 WP-300 731 173 306 523 349 3.6 8.9 49.4 25.4 12.7 W-1055H (391 cps) W-1052H W-IO46H W-IO48H WP-300 WP-300 WP-300 289 404 571 42.8 44.2 13.0 W-1065H (371 cps) W-1024H W-1034H W-1036H W-IO4OH W-1081L W-1082L W-1008K W-1012K (3)RRP WP-300 238 WP-300 WP-300 248 306 WP-300 OP-4400 QP-4400 523 4400 4800 WP-4400 5983 WP-4400 6894 mostly WRStQP-300 47.6 6.6 12.7 6.6 1.2 1.1 2.8 2.4 19.0 (1) All viscosities determined cn a dry sample basis. (2) Composition of blend W-5000EE (used in Blend W-5039HH) now unknown. (3) Returned product, but met specifications. Haake Date A B C% 6940 5.6 4.5 6767 4.1 0 6732 4.1 5742 3.64 0.52 1.1 7018 4.0 1.36 7337 5.25 1.30 o Ni-X *X1 SJ A o 0Oo<0 9w; g ** O1 <A z oS2 XIA X* * I'J o /00 S'^tFJr /P.ffc Seconal*' A O <J UCC 041385 041886 ti06 X"5// /}</c d' _/ ? O < uco 041887 riSC^O !>At-A,T s*^/6&<?-