反应详情

A comparison thermal solvent dispersion 4-hydroxy-(2'-ethylhexyl) benzoate (TS-1), a liquid at room temperature, is prepared by similar means. An aqueous solution of 10% (w/w) aqueous DA-9 (6 g), 8.3% aqueous gelatin (about 54 g), and water (74.9 g) is combined with 15 g TS-1, stirred, passed through a colloid mill 5 times, chill set, and stored in the cold until it is used for melt preparation. This colloid milled dispersion is designated a TS-1 CM dispersion. A solid particle thermal solvent dispersion of 4-hydroxy-nonyl benzoate (TS-2; Pfaltz and Bauer; melting point 90°-93° C.) is prepared similarly. About 12 g of TS-2 was dissolved in 24 g of ethyl acetate and mixed with an aqueous gelatin solution comprising 4.8 g of 10% (w/w) aqueous DA-9, 43.3 g of 8.3% (w/w) aqueous gelatin, and 35.9 g of water to give a crude dispersion. This dispersion is passed through a colloid mill 5 times, chill set, noodled, washed to remove ethyl acetate, remelted, chill set, and stored in the cold until used for melt preparation. This colloid milled dispersion is designated TS-2 (CM). Another solid particle thermal solvent dispersion of TS-2 is prepared by roller milling methods. About 18 g of TS-2 is combined with 36 g of 10% aqueous DA-9 , 66 g of water, and about 100 mL of 1.8-2.1 mm-diameter zirconia milling media and placed in a sealed glass jar. This jar is placed on a roller mill for about 123 hours, and a fine particle sized aqueous dispersion is obtained. This dispersion is passed through a cloth filter. About 110 g of this filtrate is combined with about 55.3 g of 8.3% (w/w) aqueous gelatin and 1.9 g of water at about 40° C., stirred, chill set, and stored in the cold until it is used for melt preparation. This roller milled dispersion is designated TS-2 RM.

1. temperaturechill set
2. customis used for melt preparation
3. additionmixed with an aqueous gelatin solution
4. customto give a crude dispersion
5. temperaturechill set
6. washwashed
7. customto remove ethyl acetate
8. temperaturechill set
9. customuntil used for melt preparation
10. customis obtained
11. filtrationfilter
12. customis combined with about 55.3 g of 8.3% (w/w) aqueous gelatin and 1.9 g of water at about 40° C.
13. stirringstirred
14. temperaturechill set
15. customis used for melt preparation
16. customThis roller milled dispersion