Dispersions

Details Dispersions Dispersions

1992-09-30

1994-11-22

Lovering, Richard D.

Compositions

Inorganic luminescent compositions

Tungsten containing

106425, 106426, 252314, 252588, 424 59, B01J 1300, A61K 742, C09C 104, G02B 523

Patent

active

053666607

ABSTRACT:
An oil dispersion which is substantially transparent to visible light comprises an oil, particles of zinc oxide having an average size of from 0.005 to 0.15 micron and an organic dispersing agent. The solids content of the dispersion is at least 30 weight percent, its extinction coefficients at 308 nm (E(308)) and 360 nm (E(360)) wavelengths are both at least 9 liters per gram per centimeter and the ratio E(360):E(308) is in the range 0.75:1 to 1.5:1.
A method of preparing the dispersion is also described in which the ingredients are milled together in the presence of a particulate grinding medium until the required particle size and optical properties are obtained.
The dispersions are useful in sun-screening preparations and especially those products designed to provide a balanced protection from UVA and UVB radiation.

REFERENCES:
patent: Re27818 (1973-11-01), Werner
patent: 2296636 (1942-09-01), Hanahan
patent: 2387534 (1945-10-01), Seidel
patent: 2671758 (1954-03-01), Vinograd et al.
patent: 2885366 (1959-05-01), Iler
patent: 3298959 (1967-01-01), Marks et al.
patent: 3409560 (1968-11-01), Faust et al.
patent: 3410708 (1968-11-01), McGinnis
patent: 3437502 (1969-04-01), Werner
patent: 3579310 (1971-05-01), Lewis et al.
patent: 3591398 (1971-06-01), Angerman
patent: 3676342 (1972-07-01), Gathman et al.
patent: 3728443 (1973-04-01), Berisford et al.
patent: 3907581 (1975-09-01), Willcox
patent: 3923968 (1975-12-01), Basque et al.
patent: 3928057 (1975-12-01), Decolibus
patent: 3954496 (1976-05-01), Batzar
patent: 3960589 (1976-06-01), Morrison et al.
patent: 4075031 (1978-02-01), Allen
patent: 4199370 (1980-04-01), Brand
patent: 4923518 (1990-05-01), Brand et al.
"Paints for the skin coloring", Hirosawa, Akio et al., Chemical Abstracts, vol. 87, p. 300, 1977.

Affiliated with

Also associated with

Rating

Dispersions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dispersions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1989408