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1. Lieutenants H. A. Aldrich and H. H. Nelson recently visited the Norfolk Navy Yard and at that time had occasion to observe tests of the paints 250-N and 251-N. At that tine it was noted that the formula on which these two products are based, had "seeded" badly. In view of this result, it does not seem that either of these materials could be adopted to practical use. The seeding is an indication that when the stain in applied there is not likely to be much binder left in the pigmentation. The formula used in 250-N contains Bakelite resin No. 254 which is not stable in the presence of large excesses of petroleum diluents.
2. At the time of this visit, Lieutenants Aldrich and Nelson spent some time on board the RANGER. The First Lieutenant of the RANGER stated that the flight deck stain was not entirely satisfactory. The requirements of an ideal stain for the flight deck are as follows:
It it essential to get penetration of a protective coating or other preservative material down deep into the pores of the wood. Surface protection alone is not sufficient, because when the planes land, the decks are heavily abraded by the arresting hooks and this exposes sizable areas of unprotected wood to the elements, followed shortly by decay. Much of the planking of the flight deck
was in the process of being torn up for replacement at the tine this visit. A proper coating or preservative would have obviated the necessity of replacing this decking. It is, of course, essential to maintain the non-skid properties of the coatings. The present stain seems to be satisfactory in this respect. In the formulation of any new flight deck stains this property should be kept in mind. The use of a greater ratio of pigment to vehicle and possibly a larger particle size inert might give better non-skid characteristics.
3. It may be found that it will be necessary to go to a two coat system to adequately preserve and protect the wood. It may be necessary to apply an oil containing a penetrating thinner which will penetrate down into the fibres of the wood to protect it from moisture penetration when the top coating is ruptured. Oleo-resinous materials tend to bridge and lie on the surface of the wood. An untreated oil might soak down into the cellular structure of the wood and might act as an effective protection. It might be profitable to investigate the possibility of gaining penetration by the use of surface active agents; there are a great many of these agents now available commercially and at reasonable prices. The surface-active agent could be used in one of three ways:
4. Surface-active agents are legion, and the selection of one agent for this particular work will require careful thought and considerable work. Some of the producers of surface-active agents are listed for convenience. A more complete list can be had by consulting the "Journal of Industrial and Engineering Chemistry" for January, 1941.
American Cyajnamid & Chemical Corporation,
Carbide & Carbon Chemicals Corporation,
Dewey & Alay Chemical Company,
National Oil Products, Incorporated,
Rohm & Haas Company, Inc.,
National Aniline & Chemical Company,
Monsanto Chemical Company,
5. It is requested that the deck stain problem be reopened and plans made for a new research project. The new project should be conducted in accordance with the above suggestions, funds for which are available under Project Order No. 234/43.
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Via Ron Smith:
National Archives & Records Administration, College Park
Record Group 19, General Correspondence
Transcribed by RESEARCHER @ LARGE. Formatting & Comments Copyright R@L.
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