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Use of a blend containing percarbonate for detergents and dishwashing formulations

A technology for blends and detergents, applied in detergent compounding agents, detergent compositions, inorganic/elemental detergent compositions, etc., can solve problems such as affecting the washing characteristics of preparations, and achieve the effects of easy adjustment and cost reduction

Active Publication Date: 2009-12-23
索尔维珀萨尔兹有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these coatings generally improve the long-term stability of the percarbonate, they often introduce additional foreign components into the detergent composition, which not only should be avoided in terms of environmental considerations, but may also Negatively affect the detergency properties of the resulting formulation

Method used

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  • Use of a blend containing percarbonate for detergents and dishwashing formulations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1: Blends of soda ash and sodium percarbonate

[0077] Densified soda ash (granulated sodium carbonate) was mixed with sodium percarbonate (Oxyper S131, AvOx 13.7%) in a ratio of approximately 60:40 (with some variation around this value) (samples 1 / 3 to 3 / 3 ) in the plow shear mixer ( type) mixed for 5 minutes.

[0078] The ratio between sodium percarbonate (PCS) and soda ash (SA) was varied in such a way that the resulting blends had AvOx according to Table A below.

[0079] Table A

[0080] sample

Blend 60 / 40 (1 / 3)

Blend 60 / 40 (2 / 3)

Blend 60 / 40 (3 / 3)

Moisture (M60)

0.95％

1.10％

0.82％

AvOx

7.52％

8.08％

8.93％

W(PCS)

55.7％

59.9％

66.1％

[0081] Due to the particle size distribution listed in Table B, all samples were milled to below 500 μm for the UN O.1 test. The AvOx content before and after sample preparation was tested again and confirmed.

[0082] Form ...

Embodiment 2

[0089] Example 2: Blends of Sodium Bicarbonate and Sodium Percarbonate

[0090] Sodium bicarbonate and sodium percarbonate were continuously fed into the fluidized bed at a ratio of 70% by weight of percarbonate and 30% by weight of sodium bicarbonate.

[0091] For the evaluation, two batches of Oxyper S131 were used in two experiments. The available oxygen content (AvOx) of both was measured to be 13.7% by weight. The purity of the BICAR (bicarbonate) powder used was determined to be 97.9% by weight by acid titration. Table D lists the relevant particle size distributions of the BICAR (sodium bicarbonate) powders used. The AvOx of the resulting blend was about 9.5% by weight.

[0092] Table D-Particle size of BICAR powder

[0093] Mesh [μm]

weight%

＞500

0.8

＞250

1.3

＞125

64.4

＜125

33.5

[0094] For reasons of classification, only the relevant 4:1 mixture (sample to cellulose) and packing gro...

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Abstract

Blend and use thereof for the manufacture of detergent or dishwashing formulations, the blends comprising a first type of particles containing sodium percarbonate having a mean particle size from 400 to 1000 [mu]m and one or more further type(s) of particles, each type of particles having a different chemical composition.

Description

[0001] This application claims the benefit of European Patent Application filed on December 29, 2006 with serial number 06127378.5. technical field [0002] The present invention generally relates to the use of percarbonate-containing blends for the preparation of detergent and dishwashing formulations. Background technique [0003] Sodium percarbonate (or sodium carbonate peroxyhydrate) is well known for use as a bleaching agent in detergent compositions for domestic linen or dishwashing. Typically such detergent compositions comprise, inter alia, zeolites (as builder materials), enzymes, bleach activators and / or perfumes. However, during storage and transport of the composition, interactions between sodium percarbonate and other formulation components lead to progressive decomposition of the percarbonate and thus loss of bleaching power. [0004] Many proposals have been made to overcome this problem, for example by inserting layers, called coatings, between the sodium pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/39C11D3/10C11D7/12
CPCC11D3/3942C11D7/12C11D3/10C11D3/3935
Inventor 于尔根·H·拉贝亨克·L·J·文布鲁克斯约尔格·克莱门斯
Owner 索尔维珀萨尔兹有限公司