Document 3e7aED5gBqZDj4XOXNE7oYVwy

93 Lins Enamels BQ-103 Project P-1053 .00: Mr* John Marshall8 Wlla D-7014 Mr. '3* B Bullitt Lab* Mr* j. W, Xliff, to. Dr. P. B* Brans, Lab. ^ *4 IBffitWffi CflW Philadelphia Laboratory August 9? 1948 m m cmcotATK^TUflH T0 jimsBiilL L memo r an d u m r epo r t mo . m21X EfPECT OP BATCH VARIATION JN JlrlS'53 RO-103 .SBSIN OH BET TIMS OP 93 LIME MAUSIfl. It had been presumed for some time that various batches of RG-X03. i(High G.W.O. Formula } affected the drying characteris tics of fast air dry enamels. la order to determine this xperimentally several batches of RG-103 wore examined in the 93-005 if formula. It was concluded from this study that batch variation 11 has a marked effect on the drying (tack free time) of a fast airf dry enamel. It was also concluded that none of the resin proper| ties which are currently examined can be correlated to the varia;1 tion in dry time. It may be noted that there was no appreciable variation in dry time stability. It was also determined that there was no variation in 4>aefe free time. The resin batches used in this study were 36195 35053 and 33882% the standards for these are listed in Table I. Curves showing a comparison of the original drying time with batch vari ation as well as effect on drying time stability are attached to this-report. The experimental data may be found in Notebook No. 5046, pages 15-17 inclusive. PHILADELPHIA LABORATORY 101SUB X, TABLE I Batoh No. SPo G&istir i " r' *>' Standard 7*95 + 0*05 l-'h 36195 7.92 2.^ 35053 7.92 1% 33B82 7.90 Ofilor 4 + 0.5 4.5 4.5 4.2 Ylsooslts* Solids Aoid No X-Z- 50 & l!$ 19+3 t y 50.4 16.0 1/2 E-X A. 49.& 17.3 1/2 & >50.3v 17.3 DUP030003090 :iw mm DUP030003091 EUFFFL & E S S t*