Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2005-05-03
2005-05-03
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S357000, C510S424000, C510S426000, C510S492000
Reexamination Certificate
active
06887839
ABSTRACT:
This invention is directed to detergent compositions which employ sulfonated linear alkylbenzenes as surfactants, wherein the sulfonated linear alkylbenzenes have a higher content of the sulfonated 2-phenyl alkylbenzene isomers than was previously available in sulfonated phenyl alkylbenzene surfactants of the prior art. Cleaning compositions according to the invention are more effective as cleaning agents over their counterparts of prior art which contain sulfonated linear alkylbenzenes having lower contents of the 2-phenyl alkylbenzene isomers, owing to an unexpected increase in tolerance of water hardness minerals normally associated with precipitation of the active detergent agent. Solid sulfonate salts of alkylbenzenes are also provided, including dry formulations containing same.
REFERENCES:
patent: 4162236 (1979-07-01), Feierstein et al.
Rubinfeld, Joseph, E.M. Emery and D. Cross “Structure and Performance Property Relations of Straight-Chain Alkylbenzenes”vol. 4, Mar. 1965.
Anantaneni Prakasa R.
Ashrawi Samir S.
Smadi Raeda M.
Smith George A.
Huntsman Petrochemical Corporation
Ogden Necholus
Whewell Christopher J.
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