Cationic particle and a process for making thereof

Details Cationic particle and a process for making thereof Cationic particle and a process for making thereof

2001-07-31

2003-09-30

Douyon, Lorna M. (Department: 1751)

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

Heterogeneous arrangement

C510S438000, C510S443000, C510S452000, C510S504000, C510S511000

Reexamination Certificate

active

06627596

ABSTRACT:

This application claims priority under 35 U.S.C. §371 to WO 00/44874, filed Feb. 1, 1999.
FIELD
The present invention relates to a cationic surfactant particle, particulate detergent compositions containing such cationic particle, and a process for making thereof.
BACKGROUND
Recently, there has been considerable interest within the detergent industry for laundry detergents which are “compact” and therefore, have low dosage volumes. To facilitate production of these so-called low dosage detergents, many attempts have been made to produce high bulk density detergents, for example with a density of 600 g/l or higher. The low dosage detergents are currently in high demand as they conserve resources and can be sold in small packages which are more convenient for consumers. However, the extent to which modem detergent products need to be “compact” in nature remains unsettled. In fact, many consumers, especially in developing countries, continue to prefer a higher dosage levels in their respective laundering operations. Consequently, there is a need in the art of producing modem detergent compositions for flexibility in the ultimate density of the final composition.
Currently, the relative amounts and types of materials subjected to processes in the production of detergent granules has been limited. For example, it has been difficult to attain high levels of surfactant in the resulting detergent composition, a feature which facilitates production of detergents in a more efficient manner. Cationic surfactants are a common surfactant as well as co-surfactant for use in detergent compositions and is commonly available in a liquid form. In general, detergent compositions will contain one or more types of surfactants which are designed to loosen and remove different types of soils and stains.
Based on the foregoing, there is a need for a cationic surfactant material which is in a form that is easily incorporated into particulate detergent compositions. None of the existing art provides all of the advantages and benefits of the present invention.
SUMMARY
The present invention relates to a cationic particle containing an aqueous cationic surfactant solution adsorbed to a water-insoluble high absorbing material. A process for making the cationic particle is also described herein. These and other features, aspects, and advantages of the present invention will become evident to those skilled in the art from a reading of the present disclosure.
DETAILED DESCRIPTION
While this specification concludes with claims distinctly pointing out and particularly claiming that which is regarded as the invention, it is believed that the invention can be better understood through a careful reading of the following detailed description of the invention. In this specification, all percentages, ratios, and proportions are by weight, all temperatures are expressed in degrees Celsius, molecular weights are in weight average, and the decimal is represented by the point (.), unless otherwise indicated.
As used herein, “comprising” means that other steps and other ingredients which do not affect the end result can be added. This term encompasses the terms “consisting of” and “consisting essentially of”.
All cited references are incorporated herein by reference in their entireties. Citation of any reference is not an admission regarding any determination as to its availability as prior art to the claimed invention.
The present invention relates to a cationic particle containing an aqueous cationic surfactant solution adsorbed to a water-insoluble high absorbing material. It is beneficial to have the cationic surfactant in a particulate form for various reasons, since cationic surfactants are commonly available in liquid solution form. For example, in processing particulate detergent compositions in non-tower processes, the liquid cationic surfactant may make the mixture during agglomeration sticky due to the excess moisture. In addition, the cationic particle can be made a higher active particle, as compared to its liquid form, which provides formula space when formulating a particulate detergent composition. In addition, the cationic particle of the present invention has good dispersion and solubility when used in the wash water.
The present invention also meets the aforementioned needs in the art by providing a cationic particle which can be used to produce a particulate detergent composition for flexibility in the ultimate density of the final composition.
As used herein, the term “mean residence time” refers to following definition: “mean residence time (hr)=mass (kg)/flow throughput (kg/hr)”.
Cationic Surfactant Solution
The cationic particle of the present invention contains an aqueous cationic surfactant solution. The cationic surfactant solution has at least about 70% water, preferably from about 40% to about 60%, more preferably from about 50% to about 60%, by weight of the surfactant solution. The amount of cationic active in the aqueous cationic surfactant solution is at least about 30%, preferably from about 40% to 60%, more preferably from about 40% to 50%.
Preferably the cationic surfactant is selected from the group consisting of cationic ester surfactants, cationic mono-alkoxylated amine surfactants, cationic bis-alkoxylated amine surfactants and mixtures thereof. Preferred quaternary ammonium surfactants are selected from mono C
1
-C
30
, preferably C
6
-C
16
N-alkyl or alkenyl ammonium surfactants wherein remaining N positions are substituted by methyl, hydroxyethyl or hydroxypropyl groups.
Useful cationic surfactants include water-soluble quaternary ammonium compounds of the form R
4
R
5
R
6
R
7
N
+
X
−
, wherein R
4
is alkyl having from 10 to 20, preferably from 12-18 carbon atoms, and R
5
, R
6
, and R
7
are each C
1
to C
7
alkyl preferably methyl; X
−
is an anion, e.g. chloride. Examples of such trimethyl ammonium compounds include C
12-14
alkyl trimethyl ammonium chloride and cocoalkyl trimethyl ammonium methosulfate.
Cationic surfactants also useful is a cationic choline ester-type quat surfactant which are preferably water dispersible compounds having surfactant properties and comprise at least one ester (i.e. —COO—) linkage and at least one cationically charged group. Suitable cationic ester surfactants, including choline ester surfactants, have for example been disclosed in U.S. Pat. Nos. 4,228,042, 4,239,660 and 4,260,529.
Preferred cationic ester surfactants are those having the formula:
wherein R
1
is a C
5
-C
31
linear or branched alkyl, alkenyl or alkaryl chain or M
−
.N
+
(R
6
R
7
R
8
)(CH
2
)
s
; X and Y, independently, are selected from the group consisting of COO, OCO, O, CO, OCOO, CONH, NHCO, OCONH and NHCOO wherein at least one of X or Y is a COO, OCO, OCOO, OCONH or NHCOO group; R
2
, R
3
, R
4
, R
6
, R
7
and R
8
are independently selected from the group consisting of alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl and alkaryl groups having from 1 to 4 carbon atoms; and R
5
is independently H or a C
1
-C
3
alkyl group; wherein the values of m, n, s and t independently lie in the range of from 0 to 8, the value of b lies in the range from 0 to 20, and the values of a, u and v independently are either 0 or 1 with the proviso that at least one of u or v must be 1; and wherein M is a counter anion.
Preferably R
2
, R
3
and R
4
are independently selected from CH
3
and —CH
2
CH
2
OH.
Preferably M is selected from the group consisting of halide, methyl sulfate, sulfate, and nitrate, more preferably methyl sulfate, chloride, bromide or iodide.
Preferred water dispersible cationic ester surfactants are the choline esters having the formula:
wherein R
1
is a C
11
-C
19
linear or branched alkyl chain.
Particularly preferred choline esters of this type include the stearoyl choline ester quatemary methylammonium halides (R
1
=C
17
alkyl), palmitoyl choline ester quaternary methylammonium halides (R
1
=C
15
alkyl), myristoyl choline ester quatemary methylammonium halides (R
1
=C
13
alkyl), lauroyl choline ester quat

Affiliated with

Also associated with

Rating

Cationic particle and a process for making thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cationic particle and a process for making thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cationic particle and a process for making thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3055409