Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2000-05-02
2001-12-18
Hardee, John (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
Reexamination Certificate
active
06331519
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to the use of amines and their reaction products and condensation products with acids as detergency boosters, and to detergents containing these.
2. Description of the Background
DE-A1-31 24 210 describes liquid detergents with additives to prevent dye transfer. The detergent in this case contains nonionic or zwitterionic surfactants in combination with polyethylene, amines, polyamines, polyamine-amides or polyacrylamides, which counteract dye transfer from colored textiles to white or pale-colored textiles when they are laundered together. The polyamine-amides are obtainable by condensation of polybasic acids such as dibasic saturated aliphatic C
3-8
acids and polyamines. The polymers arc described as soluble in water but not identified in detail.
DE-A1-32 11 532 describes compositions for washing and bleaching, in a non-dye-damaging manner, textiles. The detergents comprise nonionic surfactants, with or without zwitterionic surfactants, bleaching compounds, and additives to protect dyed textiles from color changes, which are polyethyleneimines, polyamines, polyamine-amides or polyacrylamides. These compounds are described as soluble in water but not specified in detail.
DE-A-1 922 450 describes detergents and cleaners which comprise antiredeposition agents to prevent resorption on the cleaned surfaces of dirt which has been removed.
Polyamides which can be prepared from polyethyleneimines with an average molecular weight of from 300 to 6000 and di- and tricarboxylic acids are used as antiredeposition agents. Reaction products with diglycolic acid, thiodiglycolic acid, aminodiacetic acid and nitrilotriacetic acid are also mentioned.
DE-A-2 165 900 describes detergents with a content of additives which prevent redeposition. The reaction product of a polyethyleneimine with a molecular weight of from 430 to 10,000 with C
8-18
-alkyl glycidyl ethers, which can furthermore be reacted with ethylene oxide, is used as antiredeposition agent.
EP-A3-0 411 436 describes the use of 2-hydroxy-3-aminopropionic acid derivatives as complexing agents, bleach stabilizers and builders in detergents and cleaners. The propionic acid derivatives may have, inter alia, polyvinylamine residues or polyethyleneimines residues.
The use of rapeseed oil fatty amine as detergency booster to remove fat particle soil is described in P. F. Kikolski, Comun. Jorn. Com. Esp. Deterg. 23 (1992) 392-333.
WO 95/33035 discloses detergent compositions which comprise oleoyl sarcosinate and a surfactant amine and are effective in particular for removing fatty or oily soilings. Primary and tertiary amines are preferably used as amines. Secondary amines with two long-chain alkyl radicals are also disclosed.
It is an object of the present invention to provide detergency boosters for detergents.
It is another object to provide detergency boosters to improve removal of dirt, in particular for stains which comprise a combination of fatty or oily and pigment-like or particulate constituents.
It is another object to provide detergents comprising detergency boosters.
It is another object to provide detergency boosters for reduced phosphate or phosphate-free detergents.
We have found that these objects are achieved by using amines as described in the claims, and by detergents as described in the claims.
As described above, the use of polyethyleneimines, polyamines and polyamides as antiredeposition agents or agents to prevent color transfer are known in the prior art.
In addition, certain polyalkylenepolyamines modified with ethylene oxide and/or fatty acid residues have been used as detergent auxiliaries.
It has been found, surprisingly, that amines and polyalkylenepolyamines which are not modified with ethylene oxide, with or without fatty acid residues, have a detergency-boosting action. Additions of small amounts of unmodified or only partially modified amines or polyalkylenepolyamines to modern detergent and cleaner formulations distinctly improve their wash efficiency, especially with regard to problematic stains which comprise a combination of fatty or oily and pigment-like or particulate constituents. The amines according to the invention are particularly advantageously employed as detergency boosters in color textile detergents. It is possible by use of the amines according to the invention distinctly to improve the soil removal capacity of color detergents, which is more limited in comparison with heavy duty detergents.
The amines according to the invention are particularly preferably used as detergency boosters in respect of oil/particle or fat/particle stains on cotton and cotton-containing blended fabrics. Compared with known detergency boosters, the detergency boosters according to the invention have the following advantages:
greater efficacy on use of the same amount,
improvement in the soil removal capacity of colored textile detergents,
improvement in the soil removal capacity for oil/particle or fat/particle stains on cotton-containing fabrics.
Examples of stains of these types are used engine oil, lipstick, makeup, shoe cream, clay/oil mixture etc.
Amines
The amines used according to the invention as detergency boosters, preferably in colored textile detergents, have an average pK
A
of from 1 to 14, preferably 2 to 13, in particular 5 to 12.5. In this connection, the pK
A
is that of the acid corresponding to the amine, i.e. of the protonated amine, and equals 14-pK
B
of the amine. The average pK
A
is defined as half the total acid used on titration of the amine.
In one embodiment of the invention, the amine is selected from amines of the general formula (I)
RR′N—[—(CR
1
R
2
)
x
—NR
3
—]
a
—[—(CR
4
R
5
)
y
—NR
6
—]
b
—R″ (I)
where the radicals R, R′ and R″, R
1
, R
2
, R
4
and R
5
are, independently of one another, hydrogen atoms, linear or branched chain C
1-20
-alkyl, -alkoxy, -hydroxyalkyl, -(alkyl)carboxy or -alkylamino radicals, C
2-20
-alkenyl radical or C
6-20
-aryl, -aryloxy, -hydroxyaryl, -arylcarboxy or -arylamino radicals, which are unsubstituted or can be further substituted, while the radicals R
3
and R
6
are, independently of one another, hydrogen atoms, linear or branched-chain C
1-20
-alkyl radicals, C
6-20
-aryl radicals, which are unsubstituted or substituted, or radicals [(CR
7
R
8
)
z
—NR
9
]
c
—R
10
, where the radicals R
7
, R
8
, R
9
and R
10
are, independently of one another, defined as above for R, R′, R″, R
1
, R
2
, R
4
, and R
5
, or are carboxymethyl carboxyethyl, phosphonomethyl or carboxamidoethyl radicals, x, y and z have, independently of one another, a value of 2, 3 or 4, and a, b and c have, independently of one another, an integral value of 0-300.
In the above amines, preferably from 5 to 100%, in particular 10 to 95%, of the nitrogen atoms are in the form of primary or secondary amino groups.
In one embodiment of the invention, the above amines have a number average molecular weight of from 80 to 150,000, preferably 100 to 50,000, particularly preferably 110 to 10,000, especially 129 to 5000.
It has been found according to the invention that the efficacy of the amines as detergency boosters is significantly better at lower molecular weights (up to a number average of about 2500) than that of amines or polyalkylenepolyamines with higher molecular weights.
The amines employed according to the invention ought preferably to have a molecular geometry which makes it possible for them to permeate into cavities in the fabrics during laundering and to displace, and thus detach, dirt located therein.
The amine or polyalkylenepolyamine of the general formula (I) can be a block polymer or block copolymer or, in one embodiment of the invention, a polymer with randomly distributed blocks or an overall randomly distributed polymer.
Likewise according to the invention are polymers which comprise repeating units corresponding to the following formula:
—[CH
2
—CH(NH
2
)]—
By this are meant, in particular, oligo/polyvinylf
Ehle Beate
Haussling Lukas
Huff Jurgen
Lux Jurgen Alfred
Meixner Hubert
BASF - Aktiengesellschaft
Hardee John
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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