代理机构 |
Renner, Otto, Boisselle & Sklar, LLP |
代理人 |
Renner, Otto, Boisselle & Sklar, LLP |
主权项 |
1. A composition for removing a contaminate material comprising metal ions and/or charged particles from a substrate, the composition comprising: water; at least one water-soluble film forming polymer comprising polyvinyl alcohol with a molecular weight in the range from about 13,000 to about 250,000 g/mole and a hydrolysis level in the range from about 75% to about 100%, at least one chelating agent that contains two or more electron donor atoms for forming coordinate bonds to the metal ions and/or charged particles; sodium dodecylsulfonate; and an effective amount of at least one thixotropic additive to allow the aqueous composition to flow when under stress and to resist flow when not under stress; the aqueous composition being capable of forming a wet film on a non-horizontal substrate that upon dehydrating forms a peelable or strippable film;
wherein the chelating agent comprises ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, citric acid, amino acid, aminopolycarboxylic acid, organophosphonate, bisphosphonate, inorganic polyphosphate, salts of any of the foregoing chelating agents, or a mixture of two or more of the foregoing chelating agents and/or salts of the foregoing chelating agents; and wherein the at least one thixotropic additive comprises a thixotropic polymer, pseudoplastic polymer, polyurethane, polyhydroxycarboxylic acid amide, modified urea, urea modified polyurethane, hectorite clay, or a mixture of two or more thereof; and two or more leveling agents selected from polysiloxane, dimethylpolysiloxane, polyether modified dimethylpolysiloxane, polyester modified dimethylpolysiloxane, polymethylalkysiloxane, aralkyl modified polymethylalkylsiloxane, alcohol alkoxylate, polyacrylate, polymeric fluorosurfactant and fluoro modified polyacrylate. |