Claims
- 1. A composition consisting essentially of (1) a liquid medium which is an alkaline aqueous solution containing ammonia and hydrogen peroxide, (2) a complexing agent comprising at least one complexing agent selected from the group consisting of ethylenediamine diorthohydroxyphenyl acetic acid, diammonium 4,4′-bis(3,4-dihydroxyphenylazo)-2,2′-stilbenedisulfonate, Pyrocatechol Violet, o,o′-dihydroxyazobenzene, and N,N′-bis(2-hydroxybenzyl)ethylenediamine-N,N′-diacetic acid, as a metal deposition preventive in the liquid medium, (3) optionally an oxidizing agent, and (4) optionally a surfactant, wherein the complexing agent contains at least one metal element selected from the group consisting of Fe, Al and Zn in an amount of at most 5 ppm.
Priority Claims (8)
Number |
Date |
Country |
Kind |
7-191504 |
Jul 1995 |
JP |
|
7-230700 |
Aug 1995 |
JP |
|
7-243859 |
Aug 1995 |
JP |
|
7-257237 |
Sep 1995 |
JP |
|
7-257238 |
Sep 1995 |
JP |
|
7-279912 |
Oct 1995 |
JP |
|
7-279913 |
Oct 1995 |
JP |
|
8-56087 |
Mar 1996 |
JP |
|
Parent Case Info
This application is a divisional of U.S. application No. 08/809,147, filed May 14, 1997, now U.S. Pat. No. 5,885,362 and a 371 of PCT/JP96/02077 filed Jul. 25, 1996.
US Referenced Citations (10)
Foreign Referenced Citations (8)
Number |
Date |
Country |
0 331 556 |
Sep 1989 |
EP |
55-52397 |
Apr 1980 |
JP |
56-149499 |
Nov 1981 |
JP |
64-20295 |
Jan 1989 |
JP |
5-275405 |
Oct 1993 |
JP |
6-41773 |
Feb 1994 |
JP |
6-163495 |
Jun 1994 |
JP |
6-216098 |
Aug 1994 |
JP |