Patent · US Expired

2-phenyl-benzimidazolesulfonic acids as UV-B filters

US6440401B1 · kind B1 · utility

8Cited by

4References

25Claims

0Family size

Assignee

MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

Ulrich Heywang · Darmstadt, DE
Michael Schwarz · Pocking, DE
Frank Pflucker · Darmstadt, DE

Key dates

Filing date	Nov 21, 2001
Grant date	Aug 27, 2002
Priority date	—
Expiry date	Nov 21, 2021

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61Q17/04
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Disclosed is a 2-phenyl-benzimidazolesulfonic acid according to the formula in whichn is 0, 1 or 2 andm is 2 or 3,R1, R2, R3, R4 and R5, are each a radical such as H, C1-8-alkyl, C1-8-alkoxy, hydroxyl, sulfate, nitro, F, Cl, Br or I radicals, andR6 is a C1-8-alkyl or C1-8-alkoxy radical.This compound can be effectively used as a UV filter, and as part of a cosmetic formulation which comprise these compounds. A process for preparation of the compound is disclosed as well.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.