Document aBx3EymNQbnR7a7KqkN5yZVra

c r o s s imm: trade Sales . -23. wTiPur@ R-1CD W-54 ttfiCal15 R-25 Rslea.se letter #1266 SC8 Up. J,' W. Illffj, Laboratory Mr, 0* EL B. MerkX* * Dr:. Paul Robinson* " Mr. B. G. Fitzgerald,, * Mr, B. L, Mansi0 , # C - ) 1 '.Philadelphia tobor&tory July 5,1950 MORAMDUM REPORT IIP. M-314 TO MARSHALL UB0MT08Y L1BM8Y fr mmmm o f *z <* p ig me h t s IMTR0DUGTX0I8 1, this report rovers the results obtained with nZn type pigments as .replacement 'for W-28 and -54 in various trade Sales Products, .2. The following lots of pigments were testeds- a) D3-20717 ,b) 03-20748 Lot Ho. 0-3203 KM-3779 (100$ t type) b 0-2870 KW-3776 {25$ Z type) 3, These pigments were tested in both laboratory and full scale plant production and were evaluated to the following types' of products;. SUMMARY; Du Pont-Alkyd Primer Sealer " rf T. & G. Flat G. C, Semi-Gloss Interior Semi-Gloss Gloss Ovalite Undercoater T?Ducon Undercoator RDulm5 Mil White Gloss b Hi Hiding Mill-Whit . G, G. Dado Enamel #8 Med, Green 639-734 621-702 69-361 - 670-760 633-762 479-767 66-079 53-48.3 58-5384 58-23708 Based on the evidence thus far accumulated from this evaluations it'appears that the nZn type -28 pigment, is quite comparable to control -23 and can b used in the above products* except the two nDuluxff Mill Whites 58-488 .and 58-5884. In these mill whites the "Z* pigment substitution show poorer gloss re tention after on month and it is felt that longer testing would be advisable before making a final decision. The us of type 1-54 ^TiCal*8 to T. .& C. Flat' 612-702 has given definitely lower hiding for some undetermined reason. This problem is receiving further study. mim.* p 2 *" The above experiments were cut to standard viscosity and based on the laboratory experiments the tsZn type pigment sub-' stifcutions were quit comparable to controls in wt./g&l., total solids and general physical properties including brushing,, drying, flow, color, gloss sagging and., build. MJiding This evaluation has definitely shown the the 25$ Z 8t type MTiCaltT to be inferior in hiding to control (IT-54) when used as the sole hiding pigment in such formulas as T, & G* Fiat. When used in small quantities in combination with 100$ nZa type (W~2$) in Mill White formulas the difference is negligible or when used in such products as 0, 0. Dado Enamels 0 Med. Green the poorer hiding also disappears because of the very dark color. In the case- of 100$ rsZw (W-23) type substitution the hiding was comparable to control in all products. , (e) Package and Drying Stability Two months shelf and one month elevated temperature (12GP) storage of the laboratory experiments has shown the "ZM type pigments to equal and in some.cases even better the perfor mance of current controls in this respect. However, we noticed that the plant batch of C, C, Dado Enamel ;fS Hed. Green showed tendency toward hard settling in five week's shelf storage, but it is our understanding that similar difficultly has been encountered with current W-54 pro duction of this product which the plant is attempting to overcome, M, Color and Gloss Retention On month A*3,1,1. Gloss readings have also shown the "Zr? pigments to be comparable to current controls in gloss reten tion except in the case of the "Duluxf? Mill Whites which show the substitutions to be inferior,. Exposure Series So, 1X393 has been prepared to evaluate for color and gloss retention in ID and YL exposure to substantiate these initial indications, le) Results of Full Scale Production Batches Full scale plant batches (1200 gals.) were made of each of the above products and no difficulty was encountered during manufacture, These batches are identified as follows % ! ' DUP030003200 I 5 <r Exp. Request No. Code 3 * Product 1656 1657 165$ 1660 1661 1662 1663 1664 1665 1666 P~56~R~70223 P~5$-E~70221 P~56~R~70219 P-621-R-70215 P-69-R-70213 P~66~R~7'021X P-479-R-70209 P-67O..R-7O207 P-633-R-70205 P-6S9-R-70203 772320 772319 772330 77692$ 776927 772321 776914 776913 776929 764083 "Dulux* Hi Hiding MU Whit Gloss 'Oulux*1 Hill White Gloss C. C. Dado Enamel #8 Med. Green du Pont T & C Plat Whit 0. c. Semi-Gloss Whit "Bueott Undercoater Qvalite Undercoater Interior Semi-Gloss Whit Interior Gloss White Alin'd Primer Sealer These batches met the. usual control tests and hare been released for regular stock. A check of. these batches versus the laboratory experiments has shows them to compare quit favorable in initial properties to the laboratory experiments. Pour quarts from each bafcchhave been set aside for future evaluations. (f). Tabulated data of this evaluation is recorded in Book Ho. 51$9. PHILADELPHIA LABORATORY BLKsEMB DUP030003201