Advanced Polymer Systems, Inc.

Other

Helen C Leong

Martin A Katz

David L Berliner

Sergio Nacht

Chung-Heng Cheng

Ann Delk

Anne Delk

This invention is a process for absorbing ultraviolet radiation in the atmosphere by dispersing melanin, its analogs, or derivatives into the atmosphere. By appropriate choice of melanin composition, size of melanin dispersoids, and their concentration, the melanin will absorb some quantity of ultraviolet radiation and thereby lessen its overall effect on the critters who would normally absorb such radiation.

Process for absorbing ultraviolet radiation using dispersed melanin

Intersticed materials, including woven and nonwoven fabrics, open-cellular materials and the like, are impregnated with functional substances by incorporating the substances in microscopic porous particles in which the pores form an interconnected network open to the particles in the interstices of the materials. The functional substances thus impart useful properties to the material in a controlled release manner.

Fabric impregnated with functional substances for controlled release

Articles for use in contact with animal tissue, such as surgical and first aid supplies, health care products and personal hygiene products, are dusted with microspheres for lubricating purposes or for the application of diffusible adjuvants. In the latter case, the microspheres are porous, with a continuous network of pores open to the exterior of the particles, permitting outward diffusion of the adjuvants at a controlled rate depending on pore size. The adjuvants include such substances as biologically active substances, deodorants, flavors, fragrances, and liquid lubricants.

Clinical and personal care articles enhanced by lubricants and adjuvants

Melanin compositions include a melanin pigment incorporated within polymeric particles, usually within an internal pore network defined by a polymeric particle matrix. The melanin compositions may be produced by in situ oxidation of melanin precursors within the pore network, or by absorption of a melanin pigment in a suitable vehicle or carrier. The melanin compositions are found to display enhanced absorbance of ultraviolet radiation and better cosmetic attributes when compared to melanin pigments which are not incorporated in such a polymeric particle matrix.

Synthetic melanin aggregates

Melanin compositions include a melanin pigment incorporated within an internal pore network defined by a polymeric particle matrix. The melanin compositions may be produced by in situ oxidation of melanin precursors within the pore network, or by absorption of a melanin pigment dispersed in a suitable vehicle or carrier. The melanin compositions are found to display enhanced absorbance of ultraviolet radiation when compared to melanin pigments which are not incorporated in such a polymeric particle matrix.

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Atherton, CA, United States of America

Helen C Leong