Document YDkm43DM1aO5vOxkgN3MeXD3y

0 0 p 1 GCt J. E. Booge, tflim. A. Siegel, Newark J* H Cooper, * F. F. Ehriob, * WaUW, 8SX -Taeemr APRIL 9, 1951 DR. J. N. TOLLY NEWARK mMmmjmjmm lie sunmsrlse herewith a brief review of the art relating to the combination of A1 phthalooyanine# with poly ohloro CFO* O.S. 2,192,704 - Da Pont This shows co-acid pasting of metal phthalooyanines to obtain jet masstonea. CPC plus about 5% Al-PC is the pre ferred conbination. One example shows the combination of poly ohloro CPO with 5% of Al-PC to give a jet XT but bluer shade. Claim 1 specifies dissolving the Mature in an acid solvent and precipitating by diluting with water. D.S. 2,276,860 - General Aniline Thie is the basic patent for high chlorination of CPC and shows a variety of chlorinating conditions including the AlCl^-HaCl eutectic melt. There is a definite dis closure of the conversion of one metal PC to another metal PC when a halogen salt of the second metal is used as tbs halogenetion carrier. A1 is mentioned as a mstal which will function in this way. U.3. 2,377,685 - Du Pont Thia covers the SgEXU chlorination procedure* The beet catalyst is said to be FeGU but usable catalysts include CuCl2 Znd2# A1&3* W&z d SWa^. It is our conclusion, in the light of this art, that it would be very difficult to obtain patent coverage on the method of obtaining jet XT CPC greens by chlorinating In the presence of a large emcees of AlGU thereby introducing seme A1 into the aelecUle. Bath the use of H Pc to give jet MT end the introduction of AL during a ohlorination reaction are shown. The only thing not shown is that tile A1 can be introduced in the S^GU chlorination process. It seems doubtful if this would be an acceptable basis for a patent. AJSilg bl A. J. STHATTOS CHEHICAL DIVISION