Document pmqjnq552M2OEwqEYG98LyQKd

MCIOWD Wim/.'lP.-CtA- *'' 5./1 1...--. : TO / FROM,,..2.r--i'...............TG -............ SHILL C HELICAL CORPORA?: DEWSR PLAKT MEMOKASPUM OF PISCUSSIOR Mr. R. M. Cole SHELL DEVELOPMENT CO. REC'D EB 2? 1955 "T Fry. .sw Subject: DKHVER MAHUFACTURE OF EPOfl ADHESIVE VI Dates of Discussion: TO HANOLE: /- CU mi ^rr January Ic _2Ql and 21, ft3 BY: Date Written: February 10, 1955 Participants: Denver Plant P. R. Bolenbaker J. Ferentchak J. H. Knaus C. C. McKenna (part time) B. 3fe.6terton J. E. Means J. A. Streich S. Zevln New York Head Office H. E. Geissler Eiaeryville E. W. DeJong PLAINTIFF'S EXHIBIT A meeting was held between Denver, Pen York and Emeryville repre sentatives to discuss manufacturing procedures for Epon Adhesive VI with regard to difficulties encountered at Denver in preparing an adhesive of comparable viscosity to that produced at Emeryville. These discussions were occasioned by Jferketing's request for a pilot batch of adhesive for a potential 25,000 lb order. Vhile this adhesive could be produced at the Emeryville pilot plant, its production at Denver was preferable since the 25>OOU lb order might be a precursor for larger future orders that could not be filled at Emeryville. It was decided, with concurrence of Hoad Office Manufacture, that the pilot batch should be made by a new blending procedure developed at the Denver Laboratory rather than by the standard Emeryville procedure. From data that were reported on Denver laboratory and plant batches, it appeared that an adhesive thus prepared would prove to be a more saleable material than that prepared by the Ericryville nethod utilizing Denver Plant equipment even though the 1 M cp viscosity limitation eight be exceeded. lam 029016 f ABS-018222 MtKOIlAHDUK OF Dli - vj MS - .1 Denver Manufacture of Eoon .Adhesive VI 2 This conclusion war. subsequent!;- borne cut by results of this pilot batch. Preliminary data indicated the adhesive was below the 1 M cp viscosity. From observations during the preparation of this batch; it appeared that the difference in adhesive viscosity resulted pri marily from differences in mixing intensity between Denver and fineryvllle equipment. According to the fineryvllle representative, Mr. DeJong, the action of the Denver unit appeared much milder than that of the fineryvllle machine. Lack of equipment for presolution of the Vinylite AYAF in AGE had in the past caused differences in operating procedure between Denver and Emeryville. For this batch an AYAF'-AGE solution was premixed using a 35 gallon, agitated, steam-heated, stainless steel kettle. However, the AYAF-AGE premix was added prior to the addition of asbestos rather than afterward as is done at Emeryville. The technique appeared to result in a less viscous, unfilled adhesive, better suited for dispersing the asbestos with the milder action of the Denver machine. In the discussion prior to preparation of the pilot batch,past experience with both laboratory and plant blending was examined to as certain where essential differences lay between the Denver and fineryvllle operation. Data presented on the effect of batch composition and of mix ing sequence are noted in the attached tabulation. It may be 3een that Denver batches havejnet the USAF specification on tensile strength. They have not met the 1 M cp tentative maximum viscosity limit. Bnsryville plant batches have normally given an adhesive viscosity less than 1 R cp. Denver laboratory batches prepared in exactly the same manner have ex ceeded 2 M cp. Early Denver plant batches using a different mixing se quence because of equipment limitations have also exceeded a 2 fi cp vis cosity. The viscosity of early Emeryville laboratory betches was not known because viscosity requirements had not been established at that time. From a review of factors affecting these restilts, it appeared that the ingredients used by Denver and Emeryville were generally compara ble in all cases. Minor variations in composition were not found to have as significant an effect on viscosity as they did on tensile strength. Considerable difference was noted in the degree and type of agitation obtained with the Denver plant and laboratory mixers as compared to the fineryvllle units. Although quantitative factors were lacking, it was shown that the Denver Plant unit was equipped for much greater energy input per unit of volume than it was using. The kneading action of the sigma blades did not appear to be as effective as the fineryville unit. The possible effect of increased speed va3 discussed without arriving at any conclusion. Microscopic examination '.ms reported to not be sufficient LAM 029017 ABS-018223 MOPRABDOM OF DlflCUSSIOR Denver l-S&nufacture of Epon Adhesive VI 2 to establish any difference in the degree of dispersion between Denver and I&neryvilAe batches. The Denver laboratory mixing was reported to correlate with the plant mixing although after observing the preparation of batches in the plant and in the laboratory, there remained some difference of opinion In this regard. In view of the limited Information on the mixing characteristics of all three machines, it was concluded that an investiga tion into the effect of mixing would be merited. Some consideration was also discussed regarding potential appli cations for this material. Since uncertainty still exists on 'che nature of complaints about the high viscosity Adhesive VI, some question was raised regarding the effect of marginal increases in viscosity over 1 M cp. This appeared Important because recent data indicated a progressive increase in viscosity vith aging. It was also observed that there appeared to be some separation of the AYAF-AGE solution and some discoloration of the dye during storage. It is expected that, these discussions and observations made dur ing the mixing of this batch will lead to a better understanding of the factors affecting the product viscosity, and will contribute to design considerations for the Houston Resin Development Unit. JB^aam cc: Participants jgb/tgm EML OEM Tech File 866-a Attachmenta J. E. Means LAM 029018 ABS-018224 TABUS I DE?VSR LABORATORY TEST RESULTS Properties of EPOS Adhesive VI Produced By Old Denver Plant Mixing Procedure Batch lb.* 4 5 6 9 P-3 P-4 Viscosity, M cp at 77*F and 2 RPW 2.56 2.16 2.80 m 2.79 2.85 Tensile Siear Strength, PSI R. T. *180 F 3634 3535 3605 3297 m * 1971 2666 1657 2453 Vi Produced by Etoeryville Mixing Procedure Batch Bo. P-5 P-7* P-28 P-29 P-17 P-23 P-30 P-63 P-45 Viscosity, M ep at 77"F and 2 RPM 2.21 1.79 2.53 2.68 1.11 2.59 0.60 Avg= 1.80 2.06 Tensile Shear, PSI R. T. +180aF mm -- m 3515 - 3363 - a - 1725 m 1100 - m Remarks Baeryville asbestos & AYAF used. Mixing extended to 9 hours. AGS Increased to 15$w. 0.1$ EaC added. 2^$ HgO added. Two runs - asbestos sifted in. Undyed. * P-numbers refer to laboratory pilot batches - others cure plant batches. LAM 029019 ABS'018225 TABLE I (Coxrt'd.) Revised Denver Mixing Procedure (Asbestos added to unfilled 71) Batch go. ^58 F^65* 5-1 P-73* P-73b P-72 Viscosity, M cp at 77*? Tensile Shear, FBI and 2 RFM__________ RT 180"? -70 F __________Remarks 1.15 U010 2575 3035 Asbestos added in 10 to 30 min; mixing continued 15 to Uo minutes 1.20 4165 2225 2935 0.79 1.26 1.86 l.M Mixed 15 min. after asbestos in. Mixing of preceding batch continued for 2 hr after asbestos addition. Mixed 1 hr after as bestos in. LAM 029020 ABS-013226 TABLE II BPOH Adhesive VI Change In Viscosity with Time Bneryville Plant Production: Batch Ha. ____ 9/15/54 Viseosity f MMCFS 2 RFM 10 RBI 2604-126-1 2604-126-2 2604-126-3 2604-126-4 2604-126-5 0.864 0.992 0.960 0.992 0.992 0.301 0.358 0.358 0.346 0.358 1/18/55_________ Viscosity, JEPS 2 RFM 10 RPM 1.248 1.344 1.312 1.312 1.344 0.454 0.499 0.544 0.487 0.493 Denver Laboratory Production: Batch Bo. P-9a P-7 P-l4 P-l6 P-18 P-21 P-22 Viscosity (M op @ 77F and 2 RFM) at Time After Mixing 1 day 6 days 5-6 Months 1.22 1.60 2.56 1.79 - 2.62 1.40 1.33 2.36 1.27 1.24 2.08 1.49 1.89 2.11 1.28 1.40 2.24 1.67 1.43 2.24 Lam 029021 ABS-018227