Document ZnQ6Vp1OL2MRMLbbLOgGVL93O

"SpliSPiasy Protein-Free Emulsion Points Mr. J. V. Xliff, Lab. Mr. Stuart Graves, Lab. Mffl IQ MftBSHftLL 1um\m | C r~ I Philadelphia Laboratory January 30, 1946 1E10HAKDUM REPORT #M-248 liiaiiCI COPY WJH"mmjATio " BMULSIQB-EYPR MXEf3 A* \0'5< Refs (l) "Continuous Film Producing Emulsion Paints" by F. B. St.Isg, Paint & Varnish Production Manager - Sept. 1945. C 2) notebook #2981, Pg. 72-80. In the above paper the author states that present day emulsion type paints are deficient In two major respects! (.1)their failure to lay down a satisfactory film, and (2) the specialised equipment and number of ingredients necessary for their manufacture. In a few paragraphs the author treats the other various problems involved In emulsion paint formulation with a marked tendency to over-simplification, Eh subject covered includes protective colloids, emulsifying agents, optimum pigmentation, and optimum oil or resin. The four typical paints described are of the borderline G/W type, for which the author claims superior wet erosion resist ance. They* contain no protein (except for Type I, which contains a small amount of casein) and are similar in composition to the E-1279 products. For these typical formulation the following . claims ar made* (1) washable films after overnight dry, (2) no paint odor, (3) stability of emulsion even after thinning, (4) emulsion stability to the freeze test, (5) a nn-putrfiabi pro tective colloid, (65 effective sealing of porous surfaces, (7) no flaking with successive coats, and (8) brush cleaned easily. When formulated as closely a possible from the materi al indicated, these paint have been found to posses generally unsatisfactory brushing properties, varying from fair to the impos sible. And furthermore. It appears that the hiding power of these paints (except for Type 3) Is Inferior to our standard Speed-Easy. The best of these four paints has a wet erosion resistance approx imately equal to that of our split phase Speed-Easy after three weeks dry. gyp X Emulsion very unstable when reduced to brushing viscos ity ; breaks down with brushing, Ha a strong sweetish odor of turkey red oil. Unreduced emulsion still stable after three weeks.. Eype IX This was the best of the four paints. Fair brush and lap., Dries In 24 hours,,. Very flat finish. Yellowing of film noticeable after three weeks.* et erosion resistance'2$*> stroke .after three 1. Reduces with soja difficulty, tending to form clumps with addition of water, These clumps an difficult to diapers, but mm. to remain fairly sell stabilised one dispersion is effected. Unreduced emulsion still stable after three Meeks. Type III Forms a very unstable emulsion apparently of the /C type, for it cannot be reduced with water. In contrast to the other three paints, this type is very thlnj having a viscosity similar to or thodox oil paints. The other three types form pastes with viscosi ties similar to that of the Speed-Easy paste. Brushing properties for Type III are poor, even when slightly reduced with mineral spirits. The color is a rather dirty tan instead of white. Has a very strong paint odor. Forms a glos sy film, but the film dries very slowly, being still tacky after 72 hours and soft after three weeks. Brush is very difficult to clean. Type XV fair brush, poor leveling and poor lap. Film yellows bad ly after three weeks. Very flat finish. Brush cleans very easily. Good emulsion stability and easily reduced. Drying time about four days. Bather poor hiding. Type 1 Pigments used: DS-15427 (TiOo - LQCR) and -4 Resin/Oil: 0-43 k H-19 Driers: FD-1450 k VD-5087 Emulsifying agents j S-522 & Casein (1-2770) . Other matetialss Methyl Cellulose, EaOE solution and water. gyp ix Pigments used: -5# & -53 1 fiesin/Oil : G-43 k H-19 ' Driers % VD-1450 & ?D-50S? Emulsifying agents: H-522, H87, Starch, and Polyethylene glycol (Mol. t. 300) Other materials: JaQH solution and' water. Type III Pigments used; -54, -28 k -55 Besin/Oll : G-43, 1-572, H-241 k I-255 Driers: YD-1450 k VD-5087 Emulsifying agents; H-522, H-87 and Polyethylea glycol $Jtol.Ht.3< Other Materials: Methyl Cellulose, laOH solution, and water. DUP030002921 9 gype XV Pigments used: 83-15*27 (Sig - LOOK) and -4 Resin/Oil : CMJ, H-259 fc 0-12 Briers: VD-1*50 & VD-50B7 Emulsifying agent: H-522 Other materials: HaOH solution. N*B. Although this last formula contains no eater it was found necessary to incorporate a small amount of eater into the past to effect thorough mixing. PHILADELPHIA LABORATORY PPR:IKB P. F. ROSBAGH DUP030002922