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S. J. Gorman/L. F. Andrews, Wilm.. R.H.Zabel, Wilm. R.J. Lombardo, Wilm. W.F.Spengeman, Chestnut; Run J. A.Lamiet, Chestnut Run W.S.Struve/A.A.Brizzolara, Nwk. W. J. MeClure/R. A.Rageman, Newark H.Arnoul, Newark Jackson, Newark Vf Newark, New Jersey May 15, 19C8 P. D. GRAHAM Pigments - Wilmington CHECK LIST "KROLOR11 ORANGE - K0-789-D I. COMPOSITION KO-789-D is a new shade of "Krolor" based on the treatment of YE-734-D with approximately 22# SiOe/AlsOe and 1$ Emory 3554D/lgepal C0630. This type product is prepared from dis persions made with the plant colloid mill and homogenizer. Development of this type material was requested by Sales (RHZ - WSS "Krolor" Orange Y - YE-789-D, 5/4/67) on the basis of 5W lots 00200 and 01000 (the latter of which was homogenized). (See NC-67-il) s Sales requested the standardization of a product equal to lot 00200 (colloid-milled) and ultimately the production of material like SW-01000. We have on hand 1759 lbs. of lot 52134 and 2547 lbs. of lot 53079 which we would consider a more reasonable standard process."" II. PROPERTIES - PLASTICS Lots 52134 and 53079 have been evaluated by Research and Chestnut Run for use in the plastics trade. Both are superior to SW-00200 set up in the original request (NC-67-11)(See also NC-67-34). These products are lighter and yellower in masstone and stronger and yellower in tint than YE-777-D (SD-86729) and are superior in thermal stability and abrasion resistance. NC-67-34 covers the most recent evaluations, of K0-789-D production and shows a slight superiority of the homogenized lots versus simple colloid-milled materials. 0 7 7 CON i K0-789-D Check List -2- May 15, 1368 Lot K0-789-D, OlOOO (homogenized SW lot) was included in an evaluation in "Dalvor" fluoro carton resin (G-67-349-8/67) and found to be superior to conventional oranges in heat resistance and better in adhesion than calcium Staybelite treated l>ts KO-786-D and KO-787-D. KO-789-L, 52134, has been exposed in Vinyl in P-68808 (5/3/68). KO-789-D lots have been found to show a very high level of alkali resistance in asbestos tile (NC-67-34). Paint Characteristics Little paint work has been done on K0-789-D types such as lot 52134 or 53079 at Chestnut Hun. Research studies have shown these lots to be on the defensive in gloss versus conventional molybdates such as YE-421-D or YE-637-D in gloss. Exterior durability and. chemical resistance of the original SW lot 01000 is excellent (see Exposure Series #67417) being better than YE-637 and more intense. Hiding power is lower as is typical of all "Krolors"; tinting strength by Research tests is propor tional to toner contents, (typical gloss level data are given in Table I. Samples of this type material have been submitted to Bennett (Lot 52097, colloid-milled and 90098-1, homogenized). No report.on these has been received by the writer. Research has studied three approaches to improvement in gloss levels* a. Treatment with calcium Staybelite - as shown by Semi-Works lot '<1)0278....Research findings' on this lot are summarized in my letter (J. J. - J.A.L., YE-789-D, 00278, 2/19/67) and an evaluation of the lot was requested since softness of films seemed to be a problem. Chestnut Run has initiated this study as NC-67-36. A verbal report on 5/15/68 from E L. Cairns summarizes Chestnut Run1s findings as follows: Strength Pigment Utility 40# vs. YE-637 1-1/2 lbs. * 1 lb. YE-637 Prying Inhibits cure in baked systems (30J,acrylic) Moisture sensitive and solvent sensitive as a result* Air dry alkyd - OK - Cure Chemical Resistance - OK Weatheroraeter approximately equal to YE-637-D. Gloss equal to or v si ws vs. YE-637-D. P I is j ij j jf | j 1 I i i DUP050028336 K0-789-D Check List -3- May 15, 1968 b, Treatment with Zinc Staybelite Since Research found the calcium Staybelite to inhibit cure (this has since been checked by Chestnut Run) a study of zinc Staybelite-treated lots was made. These were found to behave normally in paint giving good gloss levels and plastic results. We do not have patent protection on this approach as yet, and have not manufactured any calcium or zinctreated lots in the plant* c. High Speed Pulverization or ''Vortao11 Milling of TJnextended"Toner ' " Studies have indicated that high speed pulveriza tion or "Vortac" milling will yield higher gloss levels at a small sacrifice in plastics stability. Typical data are as follows: WR 67-828 System - 30J Sand Grind 20v Gloss 'Film Hardness YE-637-D Std. 60-64 Normal 52134 Low speed pulverized 31 Normal 52134 High speed pulverized 50 Normal III, TOXICITY Possibly lower than YE-777-D and conventional molybdate orange because of higher amount of silica coating, IV. PATENT POSITION1 The basic patents covering ''Krolor" type pigments are applicable. Ihese include U.S. 2,885,366 and 3,370,971 as well as patent applications Serial No. 681,323. SUBMITTED BY: CJv l w s j a c 6o n RESEARCH ASSOCIATE APPROVED BY: ' W. S. STRUVE -- LABORATORY DIRECTOR dc DUP050028337 K0-789-D Check List -4- 1 May 15, 1968 TABLE I w r System Sample Gloss Levels 20'* Gloss Film Hardness 67-828 30J sand grind YE-637-D 60-64 OK 52134 (reg,speed pulv.) 31 OK 52134 (high speed pulvs.) 50 OK 68-23 30J sand grind YE-637-D 62 'OK 52134 40 OK 90$ 52134/10$ Ca Staybelite dry mix 64 SI soft 68-101 30J sand grind YE-637-D 63 OK 52134 47 OK 94$ 52134/6$ Ca Stayhelite dry mix 55 OK DUP050028338 K0-789-D Check List -5- TABLE II EXISTING STOCKS Lot No. 52097* 52134 52225* Lbs, on Hand 1971 1759 1863 .52814* 2451 53079 2547 90098-1 (mix of the above)* 1750 90294-1 (pulverization)* 521 90293-1 (Studies)* 586 Mayl5, 1968 Type Dispersion Colloid mill Homogenized Colloid and question able homogenization Colloid and question able homogenization Colloid and homogenized Part of 90098-1 re pulverized Part of 90098-1 repulverized *A11 are probably within normal shipping limits of 52134 or 53079 for use in plastics. DUP050028339