Laundry detergent composition containing amphoteric polymer

A technology of laundry detergent and amphoteric polymer, applied in detergent composition, organic detergent composition, detergent compounding agent, etc., can solve the problems of insufficient removal and ineffective redeposition of fabric grease

Inactive Publication Date: 2019-05-21
UNILEVER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Washing with normal detergents usually does not adequately remove these stains because the active ingredients are diluted in the wash rather than concentrated at or near the stained area
In addition, ordinary detergents are not effective in addressing the redeposition of grease on fabrics during cleaning

Method used

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  • Laundry detergent composition containing amphoteric polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] monomer synthesis

[0060] 2-Carboxy-N,N-dimethyl-N-(2'-(methacryloyloxy)ethyl)ethylimmonium internal salt (CBMA) monomer was synthesized according to the method described by Zhang et al. (Superlow Fouling Sulfobetaine and Carboxybetaine Polymers on Glass Slides, Langmuir, Vol. 22, No. 24, 2006, 10073). γ-propiolactone in dry acetone was added dropwise to a solution of 2-(N,N′-dimethylamino)ethyl methacrylate in dry acetone, and the reaction was stirred at 15 °C for 24 h. The solvent was then evaporated to obtain a viscous liquid of CBMA monomer.

[0061] polymer synthesis

[0062] Free-radical polymerization of CBMA monomers in aqueous media was carried out using the method described by Lee et al. (1994), Vol. 35, No. 10, 2210-2217). Polymerization was performed using potassium persulfate as an initiator and stirring at 60 to 70° C. for 8 hours in an inert atmosphere. The molecular weight of the CBMA homopolymer is in the range of 10000 to 100000 Da.

[0063] Cop...

Embodiment 2

[0066] pretreatment test

[0067] Polyester samples were treated with polymer solutions containing different concentrations of the CBMA homopolymer of Example 1 and a control sample without any polymer. Samples were allowed to dry, then stained with artificial sebum (0.2 mL) and aged for 24 hours. The sample was then washed in a Tergotometer at 110 rpm in 24° fH (French Hardness) water (without additives or surfactants) at ambient conditions and then dried.

[0068] The SRI (Stain Removal Index) of the dried scoured fabric samples was determined. by using Artix ScannerF1 with software: Silverfast Ai Studio, Lasersoft Imaging Measure the reflectance (value at 460 nm, excluding and including UV) of the fabric sample measured at R460 to determine the SRI value.

[0069] The results of these measurements are shown in Table 1.

[0070] Table 1

[0071] Concentration of CBMA Homopolymer

Embodiment 3

[0073] Example 1 was repeated, except this time the polyester and cotton samples were first stained with model sebum and then aged for 24 hours. These stained fabric samples were run in water (24°fH) at ambient temperature at 110 rpm in a Tergotometer. cleaning in the presence of is a commercial detergent composition from Unilever.

[0074] The results are listed in Table 2.

[0075] Table 2

[0076]

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PUM

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Abstract

The invention relates to a solid laundry detergent composition containing an amphoteric polymer, said amphoteric polyemer being characterized in that least 30% of its monomeric units are betaine unitsrepresented by the following formula (I): H2C=C(R1)-C(0)0-(CH2)n-N+(R2)(R3)-(CH2)p-X (I) wherein: R1 represents a hydrogen atom or a linear or branched Ci to C6 alkyl group; R2 and R3, independentlyof each other, represent an alkyl, hydroxyalkyl or aminoalkyl group in which the alkyl group is a linear or branched C1 to C6 alkyl;n is an integer in the range of 1 to 4; p is an integer in the rangeof 2 to 8; X represents COO". The inventors have discovered that laundry detergent compositions containing the aforementioned amphoteric polymer are capable of increasing the oil repellency of fabrics.

Description

technical field [0001] The present invention relates to a solid laundry detergent composition for improved grease cleaning. The laundry detergent compositions are particularly effective at removing greasy stains from fabrics and improving the oil repellency of fabrics. The solid laundry detergent compositions of the present invention contain the amphoteric polymer in the form of a polybetaine-type polymer. Background technique [0002] Improving the removal of greasy stains is a constant goal of laundry detergent manufacturers. Washing with regular detergents usually does not adequately remove these stains because the active ingredients are diluted in the wash rather than concentrated at or near the stained area. In addition, ordinary detergents are not effective in addressing the redeposition of grease on fabrics during the cleaning process. [0003] Laundry detergent compositions specifically designed to remove greasy stains from fabrics have been described in the art. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/37C11D3/00
CPCC11D3/0036C11D3/3796
Inventor A·普拉马尼克S·罗伊乔杜里P·萨卡尔
Owner UNILEVER NV
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