Process to thicken a liquid detergent composition

A technology of liquid detergent and composition, applied in the preparation of detergent composition, soap detergent composition, detergent mixture composition, etc.

Active Publication Date: 2015-12-09
UNILEVER IP HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We have shown that such methods, although feasible at laboratory scale, are not suitable for large-scale production facilities in which the in situ neutralization of linear alkylbenzene sulfonic acids is carried out.

Method used

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  • Process to thicken a liquid detergent composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] We make a separate premix consisting of a blend of nonionic surfactant, MPG, thickening polymer and water. Surprisingly, by using this method we produced stable compositions without the need for high energy mixing and without a significant increase in processing time. The method of using such a premix to provide a stable 1 wt % polymer thickened liquid composition is given in Table 2 below.

[0131] Table 2

[0132] join order Element as 100%(%) 1 softened water 27.81 2 MEAs 6.20 3 TEA 4.00 4a NI 7EO 8.40 4b MPG 8.00 4c thickening polymer 1.00 4d softened water 10.00 5 citric acid 2.50 6 fluorescent agent 0.25 7 LAS acid 11.20 8 Dequest 2010 1.50 9 Prifac 5908 3.50 10 Sulfite 0.25 11 SLES 3EO 8.40 12 EPEI 3.00 13 Enzymes and Fragrances to 100

[0133] The ingredients added in order 4a, 4b, 4c and 4d were formulated in this order as a prem...

Embodiment 2

[0149] The premixing method used in Example 1 required a separate mixing vessel for polymer premixing. Example 2 is a modification of Example 1, using a "one pot" process to make the same composition. The amine addition was split into two separate additions, TEA was added to the polymer mixture before the LAS acid and MEA was added after it. However, if the amount of polymer to be added is not too high, it has been found that all of the base can be added to the polymer prior to the introduction of the LAS acid and the order of addition of TEA and MEA is not critical. We have found that adding base to the polymer avoids viscosity peaks that are too high, since mixing can be controlled to ensure that localized high pHs are avoided, and thus localized formation of high viscosity "gels".

Embodiment 3

[0151] The order of addition (OOA) for the one-pot process using Viscolam® CK57 polymer and separate addition of amine base is shown in Table 3. The polymer is readily dispersed in a mixture of water, MPG and nonionic surfactant. The addition of MEA thickened the mixture to the highest viscosity seen during the process. The viscosity drops again when LAS acid is added and rises after adding TEA, but not to as high a level as before. This method choice is particularly useful for more viscous compositions.

[0152] table 3

[0153] OOA Element as 100%(%) 1 softened water 37.71 2 fluorescent agent 0.25 3 MPG 8.00 4 NI 7EO 8.40 5 Viscolam CK57 1.00 6 MEAs 6.20 7 LAS acid 11.20 8 TEA 4.00 9 citric acid 2.50 10 Prifac 5908 3.50 11 Dequest 2010 1.50 12 Sulfite 0.25 13 SLES 3EO 8.40 14 EPEI 3.00 15 Enzymes, oil-free fragrances, colorants and sunscreens to 100 ...

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Abstract

A process to manufacture a liquid detergent composition thickened with a linear and or cross linked alkali swellable polyacrylate copolymer wherein the composition comprises anionic surfactant comprising linear alkylbenzene sulfonate formed by neutralisation of linear alkylbenzene sulfonic acid during the process by one or more amines, the process comprising the steps of: a) Mixing the alkali swellable polyacrylate copolymer with water, then b) Further mixing at least one amine with the mixture of step a) the amount of amine being more than sufficient to neutralise the linear alkyl benzene sulfonic acid, and then c) Adding the linear alkylbenzene sulfonic acid to the thickened mixture of step b) thereby to form the corresponding anionic surfactant by neutralisation.

Description

technical field [0001] The present invention relates to a process for the preparation of polyacrylate copolymer thickened liquid laundry detergent compositions containing amine neutralized anionic surfactants, particularly amine neutralized linear alkylbenzene sulfonates. Background technique [0002] Acrylate polymers are well known for thickening personal care detergent compositions. Typically, the anionic surfactants added to such compositions are pre-neutralized. For the manufacture of laundry detergent compositions, it is common practice to neutralize the acid precursor of the anionic surfactant linear alkylbenzene sulfonate (LAS) in situ and to use the Generated heat to assist in processing. When preparing liquid laundry detergent compositions, caustic is typically used to neutralize the acid precursor of LAS (LAS acid) and fatty acids to obtain sodium LAS and soap in the resulting liquid. It is also known to neutralize and / or adjust the pH of the liquid using ami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/22C11D3/30C11D3/37C11D10/04C11D11/00C11D11/04C11D1/29
CPCC11D3/30C11D1/22C11D1/29C11D3/3765C11D10/042C11D11/0094C11D11/04
Inventor G.阿当斯R.E.本特利
Owner UNILEVER IP HLDG BV
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