Process for the preparation of laundry soap bars with improved storage stability

A soap bar and stabilizer technology, which can be used in detergent materials, detergent compositions, detergent compounding agents, etc., and can solve problems such as loss of enzyme activity

Active Publication Date: 2009-10-07
NOVOZYMES AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The prior art cited above is all about enzyme stability during storage and use, however when incorporating enzymes into laundry detergent bar compositions loss of enzyme activity during laundry bar manufacture is also an important issue

Method used

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  • Process for the preparation of laundry soap bars with improved storage stability
  • Process for the preparation of laundry soap bars with improved storage stability
  • Process for the preparation of laundry soap bars with improved storage stability

Examples

Experimental program
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Effect test

preparation example Construction

[0102] Preparation of laundry bars

[0103] The laundry bars of the present invention can be processed in conventional laundry bar manufacturing equipment such as, but not limited to: mixers, plodders (e.g. two-stage vacuum molding machines), extruders, Cutting machines, logo-stampers, cooling tunnels and packaging machines.

[0104] Prepare the premix before adding it to the soap.

[0105] According to the present invention, the method is a method of incorporating an enzyme into a laundry soap bar and also maintaining enzyme activity.

[0106] The method of the present invention is used to prepare laundry soap bar, and it comprises the following steps:

[0107] a) Premixes are prepared by mixing enzymes, stabilizers and polyols as liquid formulations;

[0108] b) mixing the premix of step a) with soap;

[0109] c) refining the mixture of b) into refined soap; and

[0110] d) Compressing the refined soap of step c).

[0111] The premixes of the present invention can be a...

Embodiment 1

[0123] This example shows a general method for making an enzyme-containing soap bar, where the various ingredients are added to the soap separately.

[0124] Each stabilizing ingredient was added to the soap separately.

[0125] Three different proteases were tested:

[0126] 0.2% EVERLASE 16L by weight of the final laundry bar;

[0127] 0.2% SAVINASE 16L by weight of the final laundry bar;

[0128] 0.2% SAVINASE ULTRA 16L by weight of the final laundry bar.

[0129] These proteases were added to the soap at room temperature (RT) and mixed. Separately, 2% glycerin and 0.2% citric acid were added to the soap and mixed.

[0130] 2% sodium borate was added to the mixture containing Everlase 16L and Savinase 16L.

[0131] This mixture is transferred to a refiner, then to a molding press, where it is finally embossed.

[0132] Stability results are shown as percent residual enzyme activity after storage at 35°C for 2, 4, 6 or 8 weeks.

[0133]

[0134] If no loss of activ...

Embodiment 2

[0138] In this example, the stabilizer was added to the premix, which was then mixed with the soap without refining.

[0139] The components of the premix are:

[0140] EVERLASE 16L 0.2%,

[0141] Glycerin 2%,

[0142] Borax 2%,

[0143] Citric acid 0.2%.

[0144] The ingredients of the premix are blended in a mixer to make a slurry, which is then added directly to the soap. This mixture is sent directly to a molding press, whereupon the product is embossed.

[0145]

[0146] These results show that the storage stability is surprisingly high.

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Abstract

The present invention relates to a process for the preparation of laundry soap bars comprising the steps of a) Preparing a premix by mixing an enzyme, a stabilizer, a polyol and optionally a pH controlling agent; b) Mixing the premix of step a) with a soap,- c) Refining the mixture of b) to refined soap; and d) Plodding the refined soap of step c).

Description

field of invention [0001] The present invention relates to a laundry bar with improved enzyme stability, a process for the preparation of the laundry bar and the use of the laundry bar. Background of the invention [0002] Adding enzymes to laundry bars is well known. When adding enzymes to laundry bars, the stability of the added enzymes during production and storage becomes very important. Of course it is desirable to keep as much activity as possible. [0003] The activity of added enzymes can be affected eg by the water content of the laundry bar. High levels of water generally lead to lower activity of added enzymes in storage, especially for proteases. [0004] GB2186883 describes laundry bars with a water content of 10-33% and containing proteases, wherein the proteolytic enzymes are stabilized by a mixture of boron compounds, polyols, organic acids or their alkali metal salts and non-boron compounds Alkali metal salts of inorganic acids. [0005] WO98 / 54285 desc...

Claims

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Application Information

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IPC IPC(8): C11D9/26C11D9/40C11D9/30C11D17/00
CPCC11D3/221C11D3/2075C11D9/22C11D9/16C11D3/046C11D9/40C11D17/0069C11D9/265C11D3/2065C11D3/042C11D3/2041C11D3/38609C11D9/08
Inventor 尼尔斯·H·索伦森杰弗里·邓卡夫李浩东
Owner NOVOZYMES AS
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