Document 5kw65DwMwb78Nb1xj7jwdBaqN

Croso Refarena e: Bow CheBiOSX Oc* EOWicid House Paint Mildew Inhibitor GO- Mr. J. W. niff, Lab. Mr. H, W, Ether, Lab. Mr., Stuart Grams, Lab. in d ex bt de'2$*$$ Philadelphia Laboratory July 30, 1946 MEMORANDUM REPORT M-68 DOW CQBCEHTRAfl BCLDEW BEIBIfOR. POE HOUSE PAjjifigigg tm WT Fd OBOfulKM Dow Concentrate is a solution of Dowicld #6 in a ketone solvent. It is suggested as ah alternative method f handling Dowield in order to avoid the hazard of a tosie dust. The pres- at report covers the Incorporation of this material into outside White house paint for determination of stability and initial prop erty. She effectiveness in preventing mildew ..and the possible ef fect on durability are being determined in exposure series 9188. Dow Concentrate has been incorporated in. a white house paint corresponding to the;expected postwar composition with 35$ pigment volume and the vehicle 7S/25rswoIi/lO114 bodied linseed oil. Rapid bodying to a puffy paste occurs when 10$ of the ooncentrat i 5$'D^wicide: #6i-:i s used :ibn thb-total weight of the paint, Th"consiltehoy and' stability are,.satisfactory at concentrations of 6$'Cf 1$ Of th# concentrate-(3$ and 1$ of Dowi- elde #6} i Since the disired concentration - of Dowioid #6 is about 3$, it appears that Dow Concentrate could be used-in the manufacture of paint; * ' There la no important effect on the initial properties of the paint. ". 1 *K y The question whether it Would be desirable to use Dow Concentrate involves the desirability of using other solvents than ketone for house paint., Appsrsnblf, afsolution in mineral .spirits is not stable at high concentrations. However, powioid #6 is soluble in linseed oil, and It might be possible to obtain a solution in linseed oil rather than in a volatile solvent. This might be discussed with the Dow Company in case it becomes desirable to incorporate Dowlcid in .house 'paint* Notebook Reference: .3081, pages 72-83*,' PHILADELPHIA LABORATORY dL,^ d~"*L/,'A WILLIAM lo SXHGLETp VJfSlMSH