US2013096167A1PendingUtilityA1

Methods for preserving technical products such as fuels and lubricants with a microbicidal composition

59
Assignee: L AIR LIQUIDE SANTE INTERNATIONALPriority: Sep 4, 2003Filed: Dec 4, 2012Published: Apr 18, 2013
Est. expirySep 4, 2023(expired)· nominal 20-yr term from priority
Inventors:Ralf GradtkeWolfgang BeilfussKlaus WeberWolfgang Siegert
A61P 31/00A01N 43/76A01N 35/00
59
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Claims

Abstract

Methods for preserving technical products such as fuels and lubricants with a microbicidal composition. The composition is made up of at least one formaldehyde donor compound and at least one antioxidant. The antioxidant is either a gallic ester, a phenol derivative, a L-ascorbic acid, including salts and derivatives thereof, a tocopherol or one of its associated derivatives.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A microbicidal composition comprising:
 a) at least one formaldehyde donor compound; and   b) a tocopherol or tocopherol derivative.   
     
     
         2 . The composition of  claim 1 , wherein said donor compound comprises formals. 
     
     
         3 . The composition of  claim 2 , wherein said formal comprises at least one member selected from the group consisting of:
 a) an N-formal; and   b) an O-formal.   
     
     
         4 . The composition of  claim 3 , wherein said N-formal comprises at least one member selected from the group consisting of:
 a) N,N′,N″-tris(hydroxyethyl)hexahydrotriazine;   b) N,N′,N″-tris(β-hydroxypropyl)hexahydrotriazine; and   c) N,N′-methylenebis(5-methyloxazolidine).   
     
     
         5 . The composition of  claim 4 , wherein said N-formal comprises N,N′-methylenebis (5-methyloxazolidine). 
     
     
         6 . The composition of  claim 1 , wherein the weight ratio of said donor compound to said tocopherol or tocopherol derivative is in the range from about 99.9999:0.0001 to about 90:10. 
     
     
         7 . The composition of  claim 6 , wherein said range is about 99.999:0.001 to about 99:1. 
     
     
         8 . The composition of  claim 7 , wherein said range is about 99.99:0.01 to about 99.5:0.5. 
     
     
         9 . The composition of  claim 1 , wherein said composition further comprises:
 a) at least one solvent or solubility promoter; and   b) an additive, wherein said additive comprises at least one member selected from the group consisting of:
 1) corrosion inhibitors; 
 2) alkalizing agents; 
 3) dyes; 
 4) perfumes; 
 5) viscosity-modifying agents; 
 6) foam inhibitors; 
 7) emulsifiers; 
 8) stabilizers; and 
 9) a biocide. 
   
     
     
         10 . The composition of  claim 1 , wherein said composition comprises said donor compound in the amount of about 0.005% to about 99.9999% of total composition weight. 
     
     
         11 . The composition of  claim 10 , wherein said amount is about 1% to about 99.999% of total composition weight. 
     
     
         12 . The composition of  claim 11 , wherein said amount is about 5% to about 99.99% of total composition weight. 
     
     
         13 . The composition of  claim 1 , wherein said composition comprises said tocopherol or tocopherol derivative in the amount of about 0.0001% to about 10% of total composition weight. 
     
     
         14 . The composition of  claim 13 , wherein said amount is about 0.001% to about 1% of total composition weight. 
     
     
         15 . The composition of  claim 14 , wherein said amount is about 0.01% to about 0.5% of total composition weight. 
     
     
         16 . The composition of  claim 9 , wherein said composition comprises said solvent or solubility promoter in the amount of about 0% to about 99.995% of total composition weight. 
     
     
         17 . The composition of  claim 16 , wherein said amount is about 0% to about 10% of total composition weight. 
     
     
         18 . The composition of  claim 17 , wherein said amount is about 0% to about 1% of total composition weight. 
     
     
         19 . The composition of  claim 9 , wherein said composition comprises said additive in the amount of about 0% to about 50% of total composition weight. 
     
     
         20 . The composition of  claim 19 , wherein said amount is about 0% to about 30% of total composition weight. 
     
     
         21 . The composition of  claim 20 , wherein said amount is about 0% to about 20% of total composition weight. 
     
     
         22 . The composition of  claim 16 , wherein said solvent comprises water in the amount of less than about 10% of total composition weight. 
     
     
         23 . The composition of  claim 22 , wherein said amount is less than about 5% of total composition weight. 
     
     
         24 . The composition of  claim 23 , wherein said amount is less than about 1%. 
     
     
         25 . The composition of  claim 24 , wherein said amount is about 0%. 
     
     
         26 . The composition of  claim 22 , wherein said composition comprises N,N′-methylenebis(5-methyloxazolidine) in the amount of about 90% to about 99.9999% of total composition weight. 
     
     
         27 . The composition of  claim 26 , wherein said amount is about 99% to about 99.999% of total composition weight. 
     
     
         28 . The composition of  claim 27 , wherein said amount is about 99.90% to about 99.995% of total composition weight. 
     
     
         29 . The composition of  claim 22 , wherein said composition comprises N,N′-methylenebis(5-methyloxazolidine) in the amount of about 90% to about 99.9999% of total composition weight. 
     
     
         30 . The composition of  claim 29 , wherein said amount is about 99% to about 99.999% of total composition weight. 
     
     
         31 . The composition of  claim 30 , wherein said amount is about 99.90% to about 99.995% of total composition weight.

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