Document J3812KwjZwXgDOa8pg8m0qjrZ

t 1$4 TENNECOINTER-OFFICE MEMO CHEMICALS, INC. to J.W. Poarch at Burlington From E. Young AT Burlington subjfct Sodium Acetate Buffer Study date August 14, 1975 copy to W.C. Champion L. W, Kanzler ./File As was requested, a bottle polymerization run was made, buffering the re action mixture with sodium acetate. The following formulation was used: Bottles 1 and 2: 40 gms 2% solution of gelatin "A" 40 gms 2% solution of gelatin "Bf 70 gms demineralized water 0.1 gms L2O2 68 gms VCM 0.44 gms TCE 12 gms MVAc The gelatin solutions, water and L2O2 were mixed and frozen. The VCM was then added after which a chilled mixture of the MVAc and TCE were added. Bottles 2 and 3: The same formulation as above except 0.136 gms of sodium acetate was added to the water gelatin, 1*2^2 ra^x prior to freezing. All four bottles produced bottle resin. H The pH of the mother liquor after polymerization was measured. The results are in Table I. The buffered system is an average of approximately 0.7 pH units higher than the unbuffered system. Even considering previous data for unbuffered ,IA"/"B" systems, the pH is still sufficiently higher. Screen Analyses Screen analysis data is recorded on Table II. The buffered system shows no significant difference in partical size distribution from the Unbuffered sys tem. Based upon the bottle polymerization study, it appears that a buffered system will yield good resin, however, the writer would have much more confidence in the conclusion if bench scale equipment had been available for this study. Attachments (2) EY/jst COLORITE 009966 TABLE I PH OF MOTHER LIQUOR Unbuffered: Buffered System: Previous Unbuffered Runs: Bottle 1 2 Bottle 3 4 li 3.45. 3.64 H 4.25 ; 4.19 pB 3.78 3.65 4.01 3.95 E. Young 8/14/75 COLORITE 009967 TABLE XI SCREEN ANALYSIS Bottles on 35 on 60 on 80 t>n 100 >n 140 on 200 Thru 12 3 464 18 24 18 48 38 48 64 72 64 72 so : 68 98 98 96 224 E, Young 8/14/75 COLORITE 009968