Cleansing compositions

• US 5,034,148 A
• Filed: 11/29/1989
• Issued: 07/23/1991
• Est. Priority Date: 11/29/1988
• Status: Expired due to Fees

• Current Assignee: BP Chemicals Ltd. (BP PLC)
• Original Assignee: BP Chemicals Ltd. (BP PLC)
• Inventors: Black, Brian D.
• Primary Examiner(s): Lieberman, Paul
• Assistant Examiner(s): McCarthy, Kevin D.
• Application Number:
  US07/442,566
• Time in Patent Office: 601 Days
• Field of Search: 252/142, 252/136, 252/146, 252/DIG. 14, 252/117, 252/82, 252/89.1, 252/174.21, 252/173, 252/122, 252/180, 134/41
• US Class Current: 510/421
• CPC Class Codes: C11D 3/2075 Carboxylic acids-salts thereof
• CPC Class Codes: C23G 1/088 solutions containing organic acids

Abstract

This invention relates to a cleansing composition comprising a detergent and an acid salt and/or a complex of formic acid which has more than one chemical equivalent of formate ion per cation other than hydrogen. The compositions are suitable for cleaning stains and iron oxide deposits caused by the braking mechanism of railway carriages.

Claims

1. A cleansing composition comprising in aqueous solution (1) a detergent and (2) from one to 15 percent by weight an acid salt of formic acid, an acid complex of formic acid, or mixtures of the salt and complex, wherein the said acid salt and complex of formic acid comprise more than one chemical equivalent of a formate ion salt per cation other than hydrogen.

2. A composition according to claim 1 wherein the acid salt and/or complex is a tetraformate comprising one chemical equivalent of a formate ion, three chemical equivalents of formic acid and one chemical equivalent of a cation derivable from ammonia, a Group I metal or a Group II metal according to the Periodic Table.

4. A composition according to claim 1 wherein the detergent in said composition is a surfactant compatible with or capable of forming a homogeneous solution with the acid salt, and/or complex of formic acid in aqueous solution.

5. A composition according to claim 4 wherein the surfactant is a nonyl phenol ethoxylate.

6. A composition according to claim 5 wherein the surfactant is a nonyl phenol ethoxylate containing about 8 moles of ethylene oxide per mole of nonyl phenol.

7. A composition according to claim 1 wherein said composition contains a component selected from citric acid, phosphoric acid, an oxyalkylene glycol and mixtures thereof.

8. A composition according to claim 7 wherein the oxyalkylene glycol is ethoxypropoxy propanol.

3. A composition according to claim 3 wherein the acid salt and/or complex and the detergent are present in a weight ratio of 30-70:

0.5-20 respectively.