Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Protein – carbohydrate – lignin – plant matter of indeterminate...
Patent
1994-11-09
1996-10-15
Medley, Margaret
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Protein, carbohydrate, lignin, plant matter of indeterminate...
508476, 508508, 508513, C10M17302, C10M13300
Patent
active
055651275
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a new surfactant base for soapless lubricants known per se containing alkylamines and/or amphoteric compounds, optionally water and other auxiliaries and additives.
The invention also relates to the use of the lubricants as chain lubricants in the food industry. More particularly, the lubricants according to the invention are used for lubricating, cleaning and disinfecting automatic chain and belt conveyors which are used in the packaging of foods, preferably beverages, in glass and plastic bottles, cans, glasses, barrels, kegs, paper and cardboard containers and the like.
2. Statement of Related Art
The chain lubricants hitherto used for lubrication are based on the one hand on fatty acids in the form of their water-soluble alkali metal or alkanolamine salts or on fatty amines in the form of their organic or inorganic salts.
DE-A-23 13 330 describes soap-based lubricants containing aqueous mixtures of C.sub.16-18 fatty acid salts and surfactants.
Apart from these soap-based lubricants, lubricants based on primary fatty amines are otherwise mainly used. Thus, DE-A-36 31 953 describes a process for lubricating chain-type bottle conveyors in bottling plants, more particularly in breweries, and for cleaning the conveyors with a liquid cleaner which is characterized in that the chain-type bottle conveyors are lubricated with conveyor lubricants based on neutralized primary fatty amines which preferably contain 12 to 18 carbon atoms and an unsaturated component of more than 10% and in that the bottle conveyors are cleaned with cationic cleaning preparations based on the quaternary ammonium compounds, such as alkyl trimethyl ammonium chloride, dialkyl dimethyl ammonium chloride and alkyl dimethyl benzyl ammonium chloride, or organic acids.
Finally, chain lubricants without any of the disadvantages mentioned above are known from the prior art. Thus, EP-A-0 044 458 describes lubricant preparations which are substantially free from fatty acid soaps and which in addition contain carboxylated nonionic surfactants and an acyl sarcosinate. The pH value of these products is in the range from 7 to 11 and, accordingly, is preferably in the neutral to alkaline range.
Finally, DE-A-38 31 448 relates to water-containing, soapless lubricant preparations which form clear solutions in water, to a process for their production and to their use in particular as lubricants for the transport of glass bottles or polyethylene terephthalate bottles. The substantially neutral water-containing lubricant preparations (pH 6 to 8) contain alkyl benzenesulfonates, alkoxylated alkanol phosphates and alkanecarboxylic acids, optionally in addition to typical solubilizers, solvents, foam inhibitors and disinfectants.
Unfortunately, the two products described above are attended by the following three disadvantages: growth conditions for microorganisms.
3. Finally, their foaming behavior is difficult to control.
DE-A-39 05 548 describes lubricants containing at least one secondary and/or tertiary amine and/or salts of such amines.
Nowadays, beverages are often bottled in polyethylene terephthalate (PET) bottles. Returnable PET bottles have been successfully used in particular for beverages containing carbon dioxide, such as mineral waters and lemonade. During their transport in bottling plants, these bottles come into contact with chain conveyor lubricants. A more or less large part of the chain conveyor lubricant remains on the bottles, dries and results in partial damage to the bottles. More particularly, cracks, so-called stress cracks, have been found in the PET material. In extreme cases, this results in bursting of the bottles.
For this reason, soapless chain conveyor lubricants have hitherto been used almost exclusively for lubricating bottles, being tested by manufacturers for their particular suitability and then passed. Alkylamine-based chain conveyor lubricants generally known in the prior art which, as mentioned above, are widely used for the transport of
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Laufenberg Alfred
Strothoff Werner
Winkelmann Birgit
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Medley Margaret
Millson Jr. Henry E.
Szoke Ernest G.
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