Document VjGoY2RN2mG6G6pv0ZnL0VLDp

R/leaW Bo/^5 PhomliQ Re^pa "INDEXED'VG'Mr 18'53 ' MSMCRAHPUM REPORT 10* M-?8 Mr. J. W., Ililfy Lafe.. Dr. F* Robinson, lab.) In Dr* B, l, Bor@hen,lufe} Tam Mr* K. 0. Ls3npsxt* Lab. Philadelphia laboratory October 4, l<?46 BEWBI TO MARSHALL LABORATORY LIBRARY s Acetyl&ted phenolic ?m Ins have been submitted, by Dr. Sorensen for evaluation la floor paints. They sere to fee eval uated against pant&erithitol,chlorinated ,rubber formulas, the pre-war Porch and Deck enamel, the war time Interior, Floor Enam el and Acid and Alkali paints. As Gonolualoas i Enamels vers made up using a pigmentation similar to that of the prewar Porch and Deck Dark Stone. The vehicles were made with linseed oil acids and phenolic gums by Dr. Sorenson using the acetic acid process. Gums used were para-tertiary, butyl,. phenol* and high and low molecular weight straight phenol formaldehyde. These'Mins make good floor enamels which are superior in alkali resistance to peataerithitol alkvd enamels and are equal to acid and alkali paints made with VC-7738 a CMO phenolic varn ish, , They are tack-free in 6 to 8 hours which is somewhat longer than the 3 to k hours required by the pentaerlthltol enamels being used in the new "00Xi'0Xa Interior Floor enamel. Application properties, film properties and the can sta bility are satisfactory. The cost of an acetylated linseed oil resin will probably be loss than that of VC-7738* the chinawood oil phenolic so a sub stitution for VC-7738 ih the acid and allsali line should be consid ered when production facilities are available. Details t \ Enamels mm made using a pigmentation of enamel lithepone, TIPure R-110 and ailex in ih ratio 47*15*38 respectively and-at a. pigment, volume of 29$. Driers were 0.01$ cobalt and 0.5$ lead on the oil. Skinning inhibitor, VI-7552 at 1-1/2$ based on -lift 111 ' :r:i .'l ,r' the resin solids was used. To prove*at settling and flcodinp, :.3ji soya leolthln o r the pigment is deluded in tha composite t43 Procsss1* pebble mill grind* Pent&erythritol resists wheu formulated as floor paints have potential enough to dry through In 3-1/2 hours, Howaver, this is more than Is need In most cases and the aeetylated phenolic for mulas have tack and hard dry potential sufficient for & satisfactory floor paint* They are ready for light traffic when they are tackfree, that is. In 6 to S hours. These resins have a tendency to promote settling and flood ing, However, .3$ soya lecithin la a *45 Process* grind assists la the dispersion so much that after a four month storage* an enamel made this mj has not settled to form either mud or a cate. This same product is satisfactory for flooding and shows slight brushaarks in thin films, The enamels are not gamy and do not sag as much as Porch and Deck'enamel. This same sample after 4 months storage has not skinned or bodied.* n , *. gloss* It is a characteristic of these resins to impart a high * A sample of .para-tertiary butyl phenol enamel has been given out as a field test to ?. 0. Ewart* He has brushed this out a his basement floor and reports that it ls drytoWalk on in. less than 9-1& hours, and has good brushing properties, but floods. (Since this test, flooding was improved as described above) Another seaaple was given to Dr. K, E. Hopkins for his screened porch. This porch has a cement floor and is. exposed to the weather. Unfortunately a couple hours after ih enamel was applied it began to rain and the rain drops were probably broken up into mist .by the. screens but were . not kept out. The enamel has developed minute craters which are eoneeatrated in areas .most exposed to the weather,, probably as a result of the rain sine similar .craters were formed by droplets of water on panels in the lab. .Poor adliesion waa notlced on the step leading from the kitchen. The room, .in the houee most likely to. be waxed 1 the . kltchaa and this step.' Since adhesion oath step leading Into the parlor and on the porch floor was: good. It is ass umed that wax. was responsible in the areas where poor adhesion was encountered, .Poor . adhesion over waxed surfaces was obtained in the laboratory with the control floor envois' as' well as this .oa@:*; < :I A table of results is attached and .details of formulation say be obtained from laboratory Notebooks Ho. 29?4 and 3027', HCWT-nto! 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