Dispersions

Details Dispersions Dispersions

C - Chemistry, Metallurgy

01

G

134/45

C01G 23/047 (2006.01) C01G 23/053 (2006.01) C08K 9/02 (2006.01) C09C 1/36 (2006.01)

Patent

CA 1308330

ABSTRACT OF THE DISCLOSURE Dispersions of titanium dioxide in various media have been known but there has been an increasing demand for the use of titanium dioxide as an absorber for UV light whilst remaining substantially transparent to visible light. Hitherto it has not been practical to prepare a high solids content oil dispersion of such material having an extremely high maximum extinction co- efficient in the ultra violet range of wavelengths. Such a dispersion has now been developed in an oil of particles of titanium dioxide having an average size from 0.01 to 0.15 micron and an organic dispersing agent in which dispersion the amount of said particles are such that the dispersion has a solid content greater than 40% by weight. The dispersion has a maximum extinction co-efficient in the ultra violet range of wavelengths of at least 40 litres per gram per cm.

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