Laundry detergent

A laundry detergent and surfactant technology, applied in the direction of detergent compounding agent, detergent composition, surface active detergent composition, etc., can solve the problems of reducing the aesthetic value of fabrics, yellowing, etc., and achieve the promotion of cationic interaction , increase long-term existence, reduce interaction effect

Active Publication Date: 2021-08-31
UNILEVER IP HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many fabrics are white, but over the life of these fabrics, the white color fades or turns yellow, reducing the aesthetic value of the fabric

Method used

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Examples

Experimental program
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preparation example Construction

[0069] Preparation of hueing dyes

[0070] Disazo dyes can be synthesized via well-known azo coupling reactions, such as

[0071]

[0072] in for

[0073] WO2012 / 054058 describes having at least one 2 Synthesis of various disazo dyes with CHO group-terminated polyalkoxy chains.

[0074] The synthesis of alkoxylated monoazothiophene dyes is described in US4912203 and WO2011 / 017719. The main coupling reactions are:

[0075]

[0076] where R 1 and / or R 2 is an alkoxylated moiety.

[0077] pass-ch 2 Capping by CHO moieties can be obtained by (partial) oxidation of the corresponding alkoxylated material as follows:

[0078]

[0079] Usually, the -CH 2 CH 2 OH is partially oxidized to -CH 2 The CHO moiety can be achieved by using acidified sodium dichromate, preferably followed by purification of the resulting hueing dye according to the invention.

[0080] Usually, at least one alkoxy-CH 2 CHO or -CH 2 Covalent attachment of CHO-terminated polyalkoxy gr...

Embodiment 1

[0141] Liquid laundry detergents can be prepared with the following formulations:

[0142]

[0143] The liquid laundry detergent contained 0.001% by weight of a hueing dye according to the structure (Example 1, according to the invention):

[0144]

[0145] where r=1 and q is 1 (ie, r+q=2) (Example 1). As a comparative example (not according to the invention), 0.001% by weight of the same structure, but in which -CH 2 The CHO group is replaced by -CH 2 CH 2 OH-substituted shading dye (Comparative Example A, not according to the invention). As a reference, this liquid laundry detergent composition was used without any added hueing dye (reference liquid).

[0146] The wash liquor is prepared by dosing 4 g / L of laundry detergent powder into 13°FH water in a Tergotometer tank and adding a 10 x 10 cm piece of textile cotton, knitted cotton, 65 / 35 polycotton, microfiber polyester Or 80 / 20 Nylon-Elastane fabric for a 100:1 wash liquor to fabric ratio. The wash solution wa...

Embodiment 2

[0149] A powder laundry detergent formulation can be prepared having the following formulation:

[0150]

[0151]

[0152] The shading dye particles are as described in WO2006 / 053598, the formulation containing 0.0004% by weight of shading dye. The hueing dye is according to the following structure (ie Example 2, according to the invention).

[0153]

[0154] where r=1 and q is 1 (ie, r+q=2) (Example 2). As a comparative example (not according to the invention), 0.001% by weight of the same structure, but in which -CH 2 The CHO group is replaced by -CH 2 CH 2 OH-substituted shading dye (Comparative Example B, not according to the invention). As a reference, a powder laundry detergent composition was used without any added hueing dye (reference powder).

[0155] The wash solution is prepared by dosing 4 g / L of laundry detergent powder into 13°FH water in a Tergotometer tank and adding a 10 x 10 cm piece of textile cotton, knitted cotton, 65 / 35 polycotton, microfib...

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Abstract

A laundry detergent composition comprising: (i) from 2 to 70 wt. % of a surfactant; and (ii) from 0.00001 to 0.1 wt. % of shading dye which is covalently bound to at least one alkoxy-CH2CHO or -CH2CHO capped polyalkoxy group.

Description

technical field [0001] The present invention relates to laundry detergent compositions comprising shading dyes. The present invention also relates to a domestic method of treating fabrics using a laundry detergent composition comprising said hueing dye. Background technique [0002] There is a need to maintain the white appearance of the fabric so that the aesthetic value is maintained for as long as possible. Many fabrics are white, but over the life of these fabrics, the white color fades or turns yellow, reducing the aesthetic value of the fabric. To counteract this, laundry detergent manufacturers can introduce hueing dyes into their products. The purpose of the hueing dyes is to counteract fading or yellowing of white fabrics, usually by providing a shade, preferably a blue or purple shade, to the laundered fabrics. Hue dyes need to be able to deposit onto fabrics from surfactant-containing laundry liquors during the domestic laundry process while being present in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/40C11D11/00C09B29/00C09B31/10C09B62/00C09B69/00
CPCC11D3/40C11D11/0017C09B29/0033C09B29/0808C09B31/105C09B62/0086C09B69/00C09B29/0059C11D1/22C11D1/72C11D1/83C11D3/349
Inventor S·N·巴切洛尔N·S·伯纳姆
Owner UNILEVER IP HLDG BV
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