Visibly transparent UV sunblock compositions and cosmetic produc

Details Visibly transparent UV sunblock compositions and cosmetic produc Visibly transparent UV sunblock compositions and cosmetic produc

1993-04-06

1996-07-02

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

424 60, 424 63, 424 64, 514847, A61K 740, A61K 742, A61K 748

Patent

active

055319858

ABSTRACT:
Cosmetically acceptable physical sunscreens which remain visibly transparent upon the skin while remaining capable of absorbing substantial UV radiation. A first embodiment is directed to the use of a dispersion of micronized particles of zinc oxide having a very low trace metal content. A second embodiment utilizes substantially larger crystals of substantially pure zinc oxide, measuring between about 1-100 microns in diameter, formed by a process, such as chemical vapor deposition, which produces symmetrical, substantially optically perfect crystals with a relatively smooth outer surface and which are substantially free of internal fractures and imperfections. Visibly transparent glass particles having a diameter of between about 0.01-100 .mu. may also be-utilized as the UV absorbing agent. A further embodiment utilizes visibly transparent plastic spheres measuring between about 0.01-100 microns in diameter and having incorporated therein at least one UV absorbing additive for adjusting the bandgap energy of such spheres to the border between the visible and the ultraviolet wavelength ranges. The particulate materials described above are preferably dispersed into an emulsion to facilitate their application onto the surface of the user's skin. The invention further comprises cosmetic formulations having incorporated therein the particulate sunblock agents described above.

REFERENCES:
patent: 2175213 (1939-10-01), Parsons
patent: 3226297 (1965-12-01), Thuresson et al.
patent: 3425844 (1969-02-01), Flinn et al.
patent: 3441579 (1969-04-01), Isowa
patent: 3574822 (1971-04-01), Shepherd et al.
patent: 4172122 (1979-10-01), Kubik et al.
patent: 4247411 (1981-01-01), Vanlerberghe et al.
patent: 4349536 (1982-09-01), Hausler
patent: 4486405 (1984-12-01), Klein
patent: 4804531 (1989-02-01), Grollier
patent: 4822600 (1989-04-01), Wortzman
patent: 4828825 (1989-05-01), Weber et al.
patent: 4861651 (1989-08-01), Goldenhersh
patent: 4882143 (1989-11-01), Kadokura et al.
patent: 4917882 (1990-04-01), Strobridge
patent: 4925653 (1990-05-01), Grollier et al.
patent: 4935246 (1990-06-01), Ahrens
patent: 5000937 (1991-03-01), Grollier et al.
patent: 5028417 (1991-07-01), Bhat et al.
patent: 5032390 (1991-06-01), Iwaya et al.
patent: 5223250 (1993-06-01), Mitchell et al.
patent: 5270055 (1993-12-01), Moest
The Merck Index, 1976, 9812.
Cosmetics Science and Technology, 1957, pp. 197, 203, 204, 1095, 1101 and 1102.
Hurwitz, The Sun and Sunscreen Protection: Recommendations for Children, Dermatol. Surg. Oncol., 14:6, pp. 657 (Jun. 1988).
Pathak, Sunscreens and Their Use in the Preventive Treatment of Sunlight-Induced Skin Damage, Dermat. Surg. Oncol., 13:7, p. 739 (Jul. 1987).
Pathak, Sunscreens: Topical and Systemic Approaches For Protection of Human Skin Against Harmful Effects of Solar Radiation, J. Amer. Acad. Dermatol., 7, p. 285 ((1982).
Taylor et al., Photoaging/Photodamage and Photoprotection, J. Amer. Acad. Dermatol., 22:1, p. 1 (1990).
Optical Plastics: Properties and Tolerances, The Photonics Design and Applications Handbook, p. H-209 (1985).
Abramoff, Ultraviolet Stabilizers, Modern Plastics Encyclopedia (1976-1977) pp. 222, 224, 227, 708 and 709.
Plexiglas.RTM. Design & Fabrication Data, PL-1p, Rohm & Haas Company (1983).
Plexiglas.RTM. Design & Fabrication Data, PL-612d, Rohm & Haas Company (1979).
Dromgoogle, Sunscreening Agent Intolerance: Contact and Photocontact Sensitization and Contact Uritcaria, J. Amer. Acad. Dermatol., 22, p. 1068 (1990).
Eberspacher, Properties of ZnO Films Deposited Onto INP By Spray Pyrolysis, Thin Solid Films, 136, p. 1 (1986).
Brown, Zinc-Oxide: Properties and Applications, pub. by International Lead and Zinc Research Organization, Inc., pp. 11-12 (1976.
Alnsworth, Move to Natural Cosmetics Challenges Ingredient Suppliers, Chemical & Engineering News (Nov. 26, 1990).
Sayre, et al. Physical Sunscreens, J. Soc. Cosmet. Chem., 41, pp. 103-109 (Mar./Apr. 1990).
Grady, Zinc Oxide in Face Powder, J. Soc. Cosmet. Chem., pp. 17-20, (Jul. 1947).
Optical Properties, Zinc Oxide Rediscovered, pp. 21-26 (1957).
Chandra et al., Optical and Electrical Properties of Zinc Oxide Single Crystals, Indian Journal of Applied Physics, pp. 6-9 (1965).
Baum et al., Zinc Oxide: A Weathering Stabilizer For Plastics, Pub. by International Lead Zinc Research Organization, Inc., (Jun., 1984).

Affiliated with

Also associated with

Rating

Visibly transparent UV sunblock compositions and cosmetic produc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Visibly transparent UV sunblock compositions and cosmetic produc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Visibly transparent UV sunblock compositions and cosmetic produc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1504466