Document NeMZnaz24DeXXVQpznOakrQgV

I-I&4 (&0M) INTER- OFFICE MEMO TENNECO CHEMICALS , INC. \ To H.B. Carr At Burlington From F.W. Kanzler At Burlington Subject Plate-Out in 3805-D-Black Record Resin (All-Disc) date February 15, copy to R.J. Eckman B. Gawason ^/File As part of the effort to explain the plate-out observed in the subject compound, the following is a summary of the work done and the results of the tests performed in the Burlington An alytical Laboratory: 1. Use of Recovered Monomer The type 384 lots listed in Table I show that lots 64106263 had 1,000 pounds of recovered monomer charged with only one (1) out of fourteen (14) batches charged with virgin monomer. Lots 641068-69 recovered monomer level was at 2,000 pounds with seven (7) out of eighteen (18) batches containing virgin monomer only. The first four (4) lots manufactured in 1972 were charged with 1,000 and 2,000 pounds for twenty-three (23) batches while thirteen (13) batches had a charge of virgin monomer only. Lots 642005 through 642008 had a charge of 1,000 pounds for a total of twenty (20) batches and fourteen (14) batches with virgin monomer. Lot 642009 consisted of nine (9) batches with all the batches charged with 1,000 pounds of recovered monomer. 2. Use of Ninol Ninol is added to the type 384 resin routinely at a level of 1:8000 parts of resin. To better interpret the effect of Ninol on the finished compound, Resin Plant Production sug gested the use of compounds prepared with resins treated as listed in Table II. The pressouts were set up as follows: a. 3805-D-Black compound, pressed from dry blend. b. 3805-D-Black compound, pressed from roll milled sheet c. Type 384 resin with carbon black only, pressed from dry blend (same test as run in the Compound Plant). d. Type 384 resin with double the amount of carboy black added in c.. 3. Miscroscopic Analysis To best investigate the physical appearance of the type 384 resin treated as outlined in Table II, microscopic analysis was used. In addition, the pressed sheets were subjected to the same analysis in an attempt to characterize the imperfec tions and deposits appearing on the surface. j The above outlined investigations and analyses give rise to the following conclusions: COLORITE 016623 Page 2 To 1. - Use of Recovered Monomer Table I (attached) and the summary In 1, demonstrate that no unusual amounts of recovered monomer were added. The change in the RVCM/RVAcM ratio is based on the gas chromatographic analysis results obtained from the master mix tank analysis. This analysis also reflects on the RTCE level changes. No formula tion changes were made throughout the period of the lots listed. The virgin VCM origin for the last three (3) months (November and December, 1971 and January, 1972) was about thirty (30) tank cars of acetylene process monomer and approximately twenty-five (25) tank cars of oxychlorination process monomer per month. In addition, physical testing data obtained showed no unusual variations for the lotslisted with the excep tion of lot 642001 (higher screens thru 200) and 642005 (low on screens +80). A change in the resin based on monomer is therefore rather remote and can be ruled out. To 2. - Use of Ninol The pressouts of the various compounds prepared yielded the following results: a. 3805-D-Black Dry Blend (Pressed from Dry Blend) The compound of this pressout was prepared without prior heat history and was mixed in the Ronson Blender. The compounds of the four (4) samples (Ta ble II) were pressed under the conditions normally used in the Compound Plant Quality Control Labora tory, The surface inspection showed no surface im perfections previously observed (blue areas). The area of the original location of the compound pow der was easily distinguishable, however, by the nonmigration of what is suspected to be carbon black. This is manifested by a brown tint in that area. b. 3805-D-Black Dry Blehd (Pressed from Roll Milled Sheet) The compounds were prepared the same as In a. (above). After roll milling and pressout, the surface of the samples showed surface imperfections which were caused by the surface imperfections from the roll milled stock. The rectangular outline of the milled stock is very prominent. No other surface imperfections-were noted in the areas of resin flow, c. Type 584 Resin Mixed with Carbon Black Only This test was developed by Compound Plant Quality Control as a quick check for possible plate-out caused by the,resin. Sample A (Table II) showed none of the surface characteristics observed in the samples pre pared) and pressed in the Compound Plant. Flow lines are attributable to poor admixing of the resin with COLORITE 016624 Page g \ the carbon black. Sample B (Table II) showed sur face imperfections caused by carbon black. Sample C (Table II) showed some imperfections on the top of the pressout while the bottom was very difficult to release from the bottom plate. A very dull sur face can be seen by the naked eye and is probably due to the large agglomerates in the resin. (See Microscopic Analysis below). Sample D (Table II) showed the best surface and it is suspected that the excess of Wind acted as a lubricant. d. Type J>8k Resin Mixed with Double the Amount of Car bon Black Added in c. Samples A through D were prepared with double the amount of carbon black. This was done because in pressout samples of plant compound submitted by the Compound Plant, microscopic examination showed deep black areas with a white crystal structure on the surface. To see if this may be caused by the carbon black, the amount of carbon black was doubled. Aside from carbon black flow lines, no unusual sur face abnormalities were observed. To 5. - Microscopic Analysis With the exception of sample D (Table II), all other sam ples air-dried from slurry showed a relatively large amount of agglomerates when examined under the microscope This was particularly pronounced in sample C. These ag glomerates are suspected to be contributing to the dull surface described in To 2.,c. (above). Indeed the sur face showed, when inspected under the microscope, poor admixed resin particles. All surface deposits observed in all the pressouts were treated with cold and hot water as well as cold methocel. In no case were these surface deposits removed by this treatment. It is safe to assume therefore, that the plate-outs observed were not caused by the Ninol. The small amounts of deposits were not sufficient to be used for postive identification in this laboratory. Attachments (2). FWK/jt P.W. Kanzler COLORITE 0X6625 \ Lot Number 641062 Date 11/7/71 RVCM Lbs. 6oo 64106? 641068 11/7/71 6oo 12/8/71 l6bo 641069 12/9/71 1600 642001 1/4/72 600 642002 ^42003 1/6/72 1/7/72 6oo 1100 642004 1/7/72 1100 1500 642005 1/15/72 600 642006 1/15/72 600 642007 1/16/72 550 642008 1/16/72 600 550 642009 2/5/72 650 TABLE I RVAcM Lbs. 400 400 400 400 400 400 900 900 500 400 400 450 4oo 450 350 RTCE Lbs. 7 7 16 16 4 4 16 16 24 9 9 8 4 9 8 21 Number of Batches Run With Recovery Virgin Only 71 610 2 15 945 54 54 914 58 72 9 COLORXTE 016626 \ Sample Designation A B C D TABLE II Additive Emcol CC-9 Level of Addition Additive:Resin Origin 1:8000 Stripper No Additives None Stripper Ninol 1:8000 Blend Tank Ninol 5:8000 Blend Tank NOTE: The resins used were from batches ued in lot 642009. COLORITE 016627