Uv-protective compositions and their use

Patent metadata

Field	Value
Publication number	US-2020155428-A1
Application number	US-202016749046-A
Country	US
Kind code	A1
Filing date	Jan 22, 2020
Priority date	Mar 24, 2015
Publication date	May 21, 2020
Grant date	—

Abstract

Disclosed are compositions comprising inorganic UV-absorbing agents and the use of such compositions, in particular for protecting a subject or the surface of an inanimate object against a harmful effect of ultraviolet radiation.

First claim

1 . A UV-protective composition which comprises particles of at least one inorganic UV-absorbing agent selected from the group consisting of (i) barium titanate (BaTiO 3 ) and (ii) bismuth vanadate (BiVO 4 ), and which optionally comprises particles of an additional inorganic UV-absorbing agent selected from the group consisting of (iii) bismuth oxide (Bi2O 3 ) and (iv) doped zinc oxide (ZnO).

2 . The UV-protective composition according to claim 1 , wherein said at least one inorganic UV-absorbing agent is present in the composition as nanoparticles having at least one dimension of up to about 100 nm and said additional inorganic UV-absorbing agent, if included, is present in the composition as nanoparticles having at least one dimension of up to about 100 nm.

3 . The UV-protective composition according to claim 1 or claim 2 , wherein at least 50%, at least 90%, at least 95%, at least 97.5% or at least 99% of the number or of the volume of nanoparticles of the inorganic UV-absorbing agent(s) and/or of the additional inorganic UV-absorbing agent(s), if included, present in the composition have each independently at least one dimension of up to about 100 nm.

4 . The UV-protective composition of claim 3 , wherein at least 90% of the number or the volume of nanoparticles of the inorganic UV-absorbing agent(s) and/or of the additional inorganic UV-absorbing agent(s), if included, present in the composition have each independently at least one dimension of up to about 100 nm.

5 . The UV-protective composition of claim 4 , wherein at least 95% of the number or the volume of nanoparticles of the inorganic UV-absorbing agent(s) and/or of the additional inorganic UV-absorbing agent(s), if included, present in the composition have each independently at least one dimension of up to about 100 nm.

6 . The UV-protective composition of claim 5 , wherein at least 97.5% of the number or the volume of nanoparticles of the inorganic UV-absorbing agent(s) and/or of the additional inorganic UV-absorbing agent(s), if included, present in the composition have each independently at least one dimension of up to about 100 nm.

7 . The UV-protective composition of claim 6 , wherein at least 99% of the number or the volume of nanoparticles of the inorganic UV-absorbing agent(s) and/or of the additional inorganic UV-absorbing agent(s), if included, present in the composition have each independently at least one dimension of up to about 100 nm.

8 . The UV-protective composition according to any one of claims 1 to 7 , wherein the composition contains less than 10 wt. %, less than 5 wt. %, less than 4 wt. %, less than 3 wt. %, less than 2 wt. %, less than 1 wt. %, less than 0.5 wt. %, less than 0.1 wt. % or less than 0.05 wt. % organic ultraviolet-absorbing agent(s).

9 . The UV-protective composition of claim 8 , wherein the composition is generally devoid, considerably devoid, significantly devoid, substantially devoid, essentially devoid, substantively devoid or devoid of an organic ultraviolet-absorbing agent.

10 . The UV-protective composition of any one of claims 1 to 9 , wherein the combined amount of said at least one inorganic UV-absorbing agent and said optional at least one additional inorganic UV-absorbing agent in the composition is at a concentration in the range of from about 0.001% to about 40% (w/w) of the composition.

11 . The UV-protective composition of claim 10 , wherein the combined amount of said at least one inorganic UV-absorbing agent(s) and said optional additional inorganic UV-absorbing agent(s) constitutes at least 0.001 wt. %, 0.01 wt. %, at least 0.1 wt. %, at least 0.5 wt. %, at least 1 wt. %, at least 2 wt. %, at least 3 wt. %, at least 4 wt. %, at least 5 wt. %, at least 10 wt. %, at least 15 wt. %, at least 20 wt. %, at least 25 wt. %, at least 30 wt. %, or at least 35 wt. % of the composition.

12 . The UV-protective composition of any one of claims 8 to 11 , wherein the combined amount of said at least one inorganic UV-absorbing agent(s) and said optional additional inorganic UV-absorbing agent(s) constitutes at most 40 wt. %, at most 35 wt. %, at most 30 wt. %, at most 25 wt. %, at most 20 wt. %, at most 15 wt. %, at most 10 wt. %, at most 5 wt. %, at most 4 wt. %, at most 3 wt. %, at most 2 wt. %, at most 1 wt. %, at most 0.5 wt. %, or at most 0.1 wt. % of the composition.

13 . The UV-protective composition of any one of claims 1 to 12 , wherein the inorganic UV-absorbing agent(s) and, if included, the additional inorganic UV-absorbing agent(s) constitute the only ultraviolet-absorbing agents in the composition.

14 . The UV-protective composition according to any one of claims 1 to 13 , further comprising metallic silver particles.

15 . The UV-protective composition according to claim 14 , wherein said silver particles comprise silver nanoparticles having at least one dimension of up to about 50 nm, at least one dimension of up to about 40 nm, or at least one dimension of up to about 30 nm.

16 . The UV-protective composition of claim 14 , wherein said silver nanoparticles have at least one dimension in the range of from about 10 nm to up to about 50 nm.

17 . The UV-protective composition according to any one of claims 14 to 16 , wherein at least 90%, at least 95%, at least 97.5% or at least 99% of the number or the volume of the silver particles present in the composition have at least one dimension of up to about 50 nm.

18 . The UV-protective composition according to any one of claims 14 to 17 , wherein the silver particles are present in the composition at a concentration in the range of from about 0.01% to about 10% (w/w) of the total composition.

19 . The UV-protective composition according to any one of claims 1 to 18 , wherein the composition is in a form selected from the group consisting of an aerosol, a cream, an emulsion, a gel, a lotion, a mousse, a paste, a liquid coat or a spray.

20 . The UV-protective composition according to any one of claims 1 to 19 , wherein the composition is formulated as one of the following: (a) a sunscreen composition for application to human or non-human animal skin; (b) a composition for application to human or non-human animal hair; (c) a composition for application to an inanimate surface.

21 . The UV-protective composition of claim 20 , wherein the composition is formulated as a sunscreen composition for application to human skin and is in a form selected from the group consisting of an aerosol, a cream, an emulsion, a gel, a lotion, a mousse, a paste, and a liquid.

22 . The UV-protective composition of claim 20 , wherein the composition is in the form of a hair-care product selected from the group consisting of a shampoo, a conditioner and a hair mask.

23 . The UV-protective composition of claim 20 which is formulated as a varnish or a lacquer for application to an inanimate surface.

24 . The UV-protective composition according to any one of claims 1 to 19 , for use in (a) protecting a subject against a harmful effect of ultraviolet radiation; (b) protecting the skin of a subject against a harmful effect of ultraviolet radiation; (c) protecting the hair of a subject against a harmful effect of ultraviolet radiation; or (d) protecting the inanimate surface of an object against a harmful effect of ultraviolet radiation.

25 . The UV-protective composition according any one of claims 1 to 19 for use according to claim 24 , wherein the co

Assignees

• Landa Labs 2012 Ltd

Inventors

• Landa Benzion
• Abramovich Sagi
• Dor Snir

Classifications

• A61K8/19

  containing inorganic ingredients · CPC title

• C01G29/00

  Compounds of bismuth · CPC title

• A61K8/27

  Zinc; Compounds thereof · CPC title

• A61K8/29 Primary

  Titanium; Compounds thereof · CPC title

• C08K9/02

  Ingredients treated with inorganic substances · CPC title