Transparent non-vitreous ceramic particulate

Details Transparent non-vitreous ceramic particulate Transparent non-vitreous ceramic particulate

B - Operations, Transporting

32

B

240/150, 57/18,

B32B 5/16 (2006.01) B01J 2/08 (2006.01) C01B 13/32 (2006.01) C01B 33/16 (2006.01) C01G 23/047 (2006.01) C01G 25/02 (2006.01) C04B 35/00 (2006.01) C04B 35/46 (2006.01) C04B 35/48 (2006.01) C04B 35/624 (2006.01) C09C 1/00 (2006.01) E01F 9/04 (2006.01)

Patent

CA 1269216

TRANSPARENT NON-VITREOUS CERAMIC PARTICULATE Abstract of the Disclosure Solid, transparent, non-vitreous, ceramic particles useful as lens elements in retroreflective pavement markings characterized by having: A. at least one metal oxide phase; and B. an average minimum dimension of more than 125 micrometers. These particles are formed by various sol gel techniques, one example of which is the chemical gelation of titania sols by first mixing with glacial acetic acid, then with ammonium acetate, followed by formation of microspheres in 2-ethylhexanol. Microspheres of this ceramic composition can have relatively large diameters (e.g. over 200-1000 micrometers) making them quite useful as retroreflective lens elements in pavement marking sheet materials.

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