Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Patent
1998-11-30
2000-05-02
Douyon, Lorna M.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C11D 1722
Patent
active
060572841
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention relates to the use of isotridecanol block alkoxylates having an ethylene oxide block and a propylene oxide or butylene oxide block as low-foam or foam-suppressing surfactants, especially in detergent and cleaner formulations and for chemical-technical applications. The present invention further relates to detergent and cleaner formulations comprising these isotridecanol block alkoxylates.
Nonionic surfactants based on alkoxylates and block alkoxylates of long-chain alcohols of natural or synthetic origin are essential constituents of customary detergent and cleaner formulations. Similarly, block alkoxylates of isotridecanol are known in principle.
For instance, DE-A 22 09 559 (1) describes an adduct of 2 mol of ethylene oxide and 4 mol of propylene oxide with isotridecanol as a component in agents for foam control, for example for use in polymer dispersions and in the coatings, paper and food industries.
Furthermore, WO-A 92/14808 (2) recommends the use of a mixture of two similar alkoxylated long-chain alcohols, the long-chain alcohols each having first been reacted with ethylene oxide and then with propylene oxide, as foam-suppressing surfactant in cleaners for mechanical cleaning processes and in rinse aids for mechanical ware cleaning. The long-chain alcohols mentioned as candidates for alkoxylation include isotridecanol. In the block alkoxylates disclosed in (2), the degree of propoxylation is always higher than the degree of ethoxylation; for instance, Example 1 of (2) describes an adduct of 3.5 mol of ethylene oxide and 5.5 mol of propylene oxide with a C.sub.13 /C.sub.15 oxo alcohol.
Similarly, derivatives of isotridecanol block alkoxylates are known in the art. For instance, GB-A 2 196 632 (3) describes isotridecanol alkoxylates having a propylene oxide block, an ethylene oxide block and a phosphoric ester end group. These surface-active agents are recommended for use as wetting agents in the pretreatment of textile materials in the textile-making industry. EP-A 003 183 (4) discloses block alkoxylates, of isotridecanol among others, having a propylene oxide block, an ethylene oxide block and a hydrophilic end group such as sulfate, sulfonate, phosphate or carboxylate. These surface-active agents are used in petroleum production.
However, known surfactants based on alkoxylates of long-chain alcohols in the field of detergents and cleaners and in the field of chemical-technical applications have a number of disadvantages. For instance, particularly physical and application properties such as surface tension, wetting power and foam behavior are in need of improvement. Also, the known agents usually have a relatively high ecotoxicological hazard potential, especially with respect to aquatic organisms.
It is an object of the present invention to provide surfactants for the detergent and cleaner sector and for chemical-technical applications without the aforementioned disadvantages.
We have found that this object is achieved by the use of isotridecanol block alkoxylates of the general formula I ##STR2## where R is isotridecyl,
The isotridecanol (isotridecyl alcohol) is of synthetic origin in that it is produced by oligomerization of suitable lower olefins and subsequent oxo reaction (hydroformylation). For instance, isobutylene, 1-butylene, 2-butylene or mixtures thereof can be catalytically trimerized, propylene catalytically tetramerized or 2-methyl-1-pentene catalytically dimerized. The C.sub.12 olefins thus obtainable are then converted to the homologous C.sub.13 alcohol, for example by means of CO and H.sub.2 over a suitable catalyst.
The bulk of the isotridecanol comprises primary C.sub.13 alkanols having at least 3, especially 4, branches (alkyl side chains). In general they are tetramethylnonanols, for example 2,4,6,8-tetramethyl-1-nonanol or 3,4,6,8-tetramethyl-1-nonanol. Ethyldimethylnonanols such as 5-ethyl-4,7-dimethyl-l-nonanol can also be present.
However, the underlying alcohol component need not be just pure isotridecanol; homologous mixtures of branche
REFERENCES:
patent: 2934568 (1960-04-01), Barker
patent: 4280919 (1981-07-01), Stoeckigt et al.
patent: 5259963 (1993-11-01), Wiedemann
aus dem Kahmen Martin
Baur Richard
Burkhart Bernd
Gumbel Helmut
Kaluza Ulrich
BASF - Aktiengesellschaft
Douyon Lorna M.
Hardee John R.
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