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Structured detergent particles and granular detergent compositions containing the same

A structured detergent and granular technology, applied in detergent compositions, surface active detergent compositions, organic detergent compositions, etc., can solve the problem of narrow process operation window, caking of finished products, and difficulty in preparing highly active LAS particles And other issues

Inactive Publication Date: 2017-10-13
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to prepare such highly active LAS particles using agglomeration techniques in practice
In terms of robust quality control, key manufacturing challenges include poor flow of intermediate powders and narrow process operating windows
Furthermore, even when successfully formed, highly reactive LAS particles tend to have poor flowability, and they have a strong tendency to absorb moisture from the air over time, leading to clumping of the finished product

Method used

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  • Structured detergent particles and granular detergent compositions containing the same
  • Structured detergent particles and granular detergent compositions containing the same
  • Structured detergent particles and granular detergent compositions containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1: Demonstration of inventive particles (agglomerates comprising 80% LAS and 16.8% silica) versus comparative Comparative Test of Flowability Improvement of Granules (Spray Dried Powder Containing 80% LAS and 10% Silica)

[0074] 1.1. By first according to the present invention, using a BRAUN CombiMax K600 food mixer, at a speed of level 8, 416.67 grams of LAS paste (90% active substance), 83.33 grams of precipitated hydrophilic silica powder (under the trade name SN340 Commercially available from Evonik Industries Ag) agglomerated to form 500 grams of structured particles, and then dried such structured particles to remove 31 grams of water, so as to obtain 469 grams of the final particles of the present invention, the preparation of structured particles comprising the scope of the present invention A first particle sample of the particles (hereinafter "the particles of the invention"). Such dry structured particles have a LAS active content of about 80% by...

Embodiment 2

[0095] Example 2: Comparative Tests Showing Reduced Moisture Uptake by Granules of the Invention Compared to Comparative Granules

[0096] 2.1. Repeat the steps 1.1-1.2 in Example 1 to prepare the inventive granules and comparative granules.

[0097] 2.2. On a METTLER TOLEDO XP504 balance with a deviation of 0.1 mg, using a circular sample pan with a diameter of 9.5 cm, weigh about 10 grams of the particles of the invention.

[0098] 2.3. Close the glass cover of the balance and keep the room condition at 25°C / 50%RH.

[0099] 2.4. Record the weight at 0 minutes, 60 minutes, 90 minutes, and 120 minutes.

[0100] 2.5. For the same amount of comparative particles (about 10 grams), repeat steps 2.2-2.4.

[0101] 2.6. The moisture absorption of each particle is calculated as:

[0102] Moisture absorption % at X minutes = (weight at X minutes - weight at 0 minutes) * 100 / weight at 0 minutes

[0103] 2.7. The following are the water absorption results, as listed in Table IV:

...

Embodiment 3

[0107] Example 3: Exemplary Formulations of Granular Laundry Detergent Compositions

[0108]

[0109]

[0110]

[0111] *The base granule is a spray dried detergent granule containing about 12-13% by weight LAS, about 70-75% by weight sodium sulfate, about 8-10% by weight silicate and less than 3% by weight moisture.

[0112] All enzyme levels are expressed as rug active enzyme protein per 100 g of detergent composition.

[0113] The surfactant component is available from BASF (Ludwigshafen, Germany) Shell Chemicals (London, UK); Stepan (Northfield, Ill., USA); Huntsman (Huntsman, Salt Lake City, Utah, USA); Clariant (Sulzbach, Germany)

[0114] Sodium tripolyphosphate is available from Rhodia (Paris, France).

[0115] Zeolites are available from Industrial Zeolite (UK) Ltd (Grays, Essex, UK).

[0116] Citric acid and sodium citrate are available from Jungbunzlauer (Basel, Switzerland).

[0117] NOBS is sodium nonanoyloxybenzenesulfonate supplied by Eastman (...

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Abstract

Discolsed a structured detergent particles with high-level surfactant activity containing about 50-90 wt% of a C 10-C 20 linear alkyl benzene sulphonate, about 10-50 wt% of a hydrophilic silica, and about 0-35 wt% of a water-soluble salt of an alkaline metal. Such structured detergent particles demonstrate better flowability and less moisture uptake, and are therefore particularly useful for forming free-flowing finished detergent products that are less vulnerable to caking over time.

Description

technical field [0001] The present invention relates to granular detergent compositions. In particular it relates to granular detergent compositions comprising free-flowing structured detergent particles having a high level of surfactant activity (eg 50% to 90% by weight) exhibiting improved flow properties and reduced water intake. Background technique [0002] Anionic surfactants comprising linear alkylbenzene sulfonates ("LAS") are among the most commonly used cleaning actives in powder detergent formulations. Detergent particles comprising LAS can be readily formed by a variety of different agglomeration processes. [0003] Typical LAS agglomerates have a surfactant activity of 35% by weight or less. However, for better product quality (e.g. faster dissolution, higher foam generation rate, etc.) The demand for pellets continues to grow. It is difficult to prepare such highly active LAS particles using agglomeration techniques in practice. In terms of robust quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/12C11D3/08C11D3/34
CPCC11D1/22C11D3/046C11D3/124C11D17/06C11D17/065
Inventor 陈鸿兴耿代涛马俭泽
Owner PROCTER & GAMBLE CO
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