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Title:
A METHOD FOR OBTAINING A SOAP BASED NATURAL LIQUID DETERGENT AND A SOAP BASED NATURAL LIQUID DETERGENT OBTAINED WITH THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/125336
Kind Code:
A2
Abstract:
With the present invention, a natural, herbal soap based liquid detergent formula which is physically stable at low and high temperatures, which does not have viscosity or gelation problems, which has high washing and cleaning performance, which is human and environmental friendly has been developed which can be used in hand washing or washing machine for cleaning laundry instead of synthetic liquid detergent with the addition of other components such as thickeners, chelating raw material, perfume, dye and extracts to natural soap form produced after saponification of vegetable fat acids with a weak and/or strong base at a high pH.

Inventors:
ESEN ÖZLEM (TR)
AVCI TUNA ASLI ÖZGE (TR)
ÜNAL SINEM (TR)
Application Number:
PCT/TR2018/050469
Publication Date:
June 27, 2019
Filing Date:
September 06, 2018
Export Citation:
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Assignee:
EVYAP SABUN YAG GLISERIN SANAYI VE TICARET ANONIM SIRKETI (TR)
International Classes:
G08G1/017; C11D9/00
Attorney, Agent or Firm:
ANKARA PATENT BUREAU LIMITED (TR)
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Claims:
CLAIMS

1. A production method for obtaining a soap based natural herbal liquid detergent, which is biodegradable, physically stable at temperatures in range of 5°C - 50°C, has high washing performance at 7-32 French Hardness, comprising the steps of

i. preparing vegetable fatty acid solution, base solution/basic material and salt solution,

ii. mixing vegetable fatty acid solution with base and salt solutions at 80°C for performing saponification reaction,

iii. adding thickener and chelating agent to the solution formed by mixing vegetable fatty acid solution with base and salt solutions, iv. cooling the resulting product to a temperature below 35°C. 2. A method for obtaining soap based natural liquid detergent according to claim 1, wherein vegetable fatty acid chains between C8 - C18 are used as fatty acids in the vegetable fatty acid solution.

3. A method for obtaining soap based natural liquid detergent according to claim 2, wherein vegetable fatty acid chains between C12 - C18 are used as fatty acids in the vegetable fatty acid solution.

4. A method for obtaining soap based natural liquid detergent according to claim 1 or 2, at least one fatty acid selected from the group consisting of caprylic acid (C8Hi602), capric acid (C10H20O2), lauric acid (C12H24O2), myristic acid (C14H28O2), palmitic acid (C16H32O2), stearic acid (C18H36O2), oleic acid (C18H34O2), linoleic acid (C18H32O2), linolenic acid (C18H30O2) fatty acids and a combination thereof is used as fatty acid in the vegetable fatty acid solution.

5. A method for obtaining soap based natural liquid detergent according to claim 4, wherein at least one of the fatty acids selected from the group consisting of lauric acid (C12H24O2), myristic acid (C14H28O2), palmitic acid (C16H32O2) and a combination thereof, among the saturated vegetable fatty acids, is used as fatty acid in the vegetable fatty acid solution.

6. A method for obtaining soap based natural liquid detergent according to claim 5, wherein a mixture is used in which among the saturated vegetable fatty acids, the ratio of the lauric acid is in range of 1.0-50.0% by mass, the ratio of the myristic acid is in range of 1.0-20.0% by mass, and the ratio of the palmitic acid is in range of 1.0-20.0% by mass.

7. A method for obtaining soap based natural liquid detergent according to claim 6, wherein a mixture is used in which among the saturated vegetable fatty acids, the ratio of the lauric acid is in range of 5.0-40.0% by mass, the ratio of the myristic acid is in range of 3.0-15.0% by mass, and the ratio of the palmitic acid is in range of 3.0-10.0% by mass.

8. A method for obtaining soap based natural liquid detergent according to claim 7, wherein a mixture is used in which among the saturated vegetable fatty acids, the ratio of the lauric acid is in range of 10.0-30.0% by mass, the ratio of the myristic acid is in range of 3.0-10.0% by mass, and the ratio of the palmitic acid is in range of 4.0-8.0% by mass.

9. A method for obtaining soap based natural liquid detergent according to claim 5, wherein among the saturated vegetable fatty acids, the ratio of the lauric acid is in range of 10.0-30.0% by mass, the ratio of myristic acid ratio is in range of 3.0-10.0% by mass.

10. A method for obtaining soap based natural liquid detergent according to claim 5, wherein among the saturated vegetable fatty acids, the ratio of the lauric acid is in range of 10.0-30.0% by mass, the ratio of palmitic acid ratio is in range of 3.0-10.0% by mass.

11. A method for obtaining soap based natural liquid detergent according to claim 1, wherein at least one base solution/basic material selected from the group consisting of potassium hydroxide (KOH), sodium hydroxide (NaOH), monoethanolamine (H2NCH2CH20H), diehtanolamine (HN (CH2CH20H)2) , triethanolamine (N(CH2CH20H)3), ammonia (NH3) is used.

12. A method for obtaining soap based natural liquid detergent according to claim 11, wherein potassium hydroxide (KOH) is used as basic material.

13. A method for obtaining soap based natural liquid detergent according to claim 1 or 12, wherein the amount of basic material is in range of 1.0- 30.0% by mass.

14. A method for obtaining soap based natural liquid detergent according to claim 13, wherein the amount of basic material is in range of 5.0-20.0% by mass.

15. A method for obtaining soap based natural liquid detergent according to claim 14, wherein the amount of basic material is in range of 7.0-10.0% by mass.

16. A method for obtaining soap based natural liquid detergent according to claim 1, wherein at least one of sodium chloride (NaCl), sodium sulfate (NaS04) and potassium chloride (KC1) is used as salt solution.

17. A method for obtaining soap based natural liquid detergent according to claim 16, wherein sodium chloride (NaCl) salt solution is used as salt solution.

18. A method for obtaining soap based natural liquid detergent according to claim 1, wherein at least one of hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, acrylate copolymer emulsions and all other thickeners is used as thickener.

19. A method for obtaining soap based natural liquid detergent according to claim 18, wherein hydroxyethyl cellulose is used as thickener.

20. A method for obtaining soap based natural liquid detergent according to claim 1 and 19, wherein the amount of thickener is in range of 0.001- 10.0% by mass.

21. A method for obtaining soap based natural liquid detergent according to claim 20, wherein the amount of thickener is in range of 0.01-5.0% by mass.

22. A method for obtaining soap based natural liquid detergent according to claim 1, wherein at least one of EDTA derivatives or sodium glutamate diacetate is used as chelating agent.

23. A method for obtaining soap based natural liquid detergent according to claim 22, wherein tetrasodium EDTA is used as chelating agent.

24. A method for obtaining soap based natural liquid detergent according to claim 1 comprising the step of adding perfume into the cooled product after the step of“cooling the resulting product”.

25. A method for obtaining soap based natural liquid detergent according to claim 1 comprising the step of adding coloring agent into the cooled product after the step of“cooling the resulting product”.

26. A method for obtaining soap based natural liquid detergent according to claim 1 comprising the step of adding extract into the cooled product after the step of“cooling the resulting product”.

27. A soap based natural liquid detergent which is obtained by a method according to any one of the preceding claims, and which is biodegradable, physically stable at temperatures between the range of 5°C - 50°C, has high washing performance at 7-32 French Hardness.

Description:
A METHOD FOR OBTAINING A SOAP BASED NATURAL LIQUID DETERGENT AND A SOAP BASED NATURAL LIQUID DETERGENT

OBTAINED WITH THEREOF

Field of the Invention

The present invention relates to a natural and herbal, soap based liquid detergent in order to eliminate all potential negative effect of conventional solid/liquid detergents on human and environmental health.

Background of the Invention

In the recent past, the detergent obtained synthetically from crude oil have been started to be used as cleaner. However, due to the negligent production of these detergents and the insensible spread to environment, a serious increase has been observed in the contamination of water, air and soil which are the living environment of human beings and other living things.

In an article titled“Sensing and analysis of soluble phosphates in environmental samples” published by Warwick, C., Guerreiro, A. and Soares, A., in 2013 on Biosens. Bioelectron. 41, 1-11, it is disclosed that the chelating agents added into current detergents for increasing their performance cause serious problems in terms of environment. For instance, the phosphates used for chelation are used as food by aquatic creatures, excess phosphate causes an increase in population of living things such as algae in the ecosystem more than the usual. The algae accumulating on water surface due to this increase prevent oxygen and light from reaching below water, and thus it affects the life of other living things. In article titled“Detergent” published on“Encyclopedia of Toxicology, Second Edition, page 739 -742 by Cai, Z. And Hakkiken, P.J., it is stated that for this purpose European Union countries (Germany, Austria, Belgium, Ireland, and Italy) have developed a legislation based on the control of the phosphate amount added into the detergents.

Furthermore, the non-biodegradable substances have been released to the environment since substances that have little water solubility such as kaolin, bentonite, acid and silicates have been added into detergent formulas in order to reduce high cost of surfactants. It can be said that the greater the amount of non- biodegradable material in a product content, the more likely it is to affect the environmental pollution. Because the products that do not degrade in water and soil cause the death of living things in the sea when they flow into the rivers and sea, and cause the plants and the living things in the soil to be harmed when mixed with the soil, and thus threaten the ecological system.

In addition to all the negative effects that are mentioned above, several materials such as whiteners, rinsing agents, foaming agents, anti-foaming agents, etc. used in detergents may also cause irritation in tissues of living things’ body, even cancer like the surfactants. Therefore, the impact of the synthetic detergents used in recent years on environmental pollution has started to draw attention, and there is a necessity to take precautions on this matter. In light of the information disclosed in Public Health Text Book “Sixth Chapter ENVIRONMENTAL HEALTH” in 2008 by Istanbul University Publications: 4747, Cerrahpasa Faculty of Medicine Publications: 261, Koksal, S., page 605-650, the limit is determined such that the amount of detergent surfactant entering into human body in Turkey will be 1 mg/L maximum. However, the studies carried out in our country have shown that there is a high amount of surfactants even in drinking water. For this reason, the use of biodegradable detergents in our country has significant importance.

The soap and surfactants contained in the detergents reduce the surface tension during the washing process and carry out foaming and cleaning processes. The cleaning process briefly comprises the steps of i) Wetting the material to be used and the dirty surface with a washing solution (soap or detergent),

ii) Removing the dirt from the surface,

iii) Keeping the dirt within the washing solution.

The molecules that make up the washing solution have both hydrophilic and hydrophobic structures. The hydrophobic end of the molecule leads to the dirt particle and surrounds the dirt while its hydrophilic end removes the dirt particle from the fabric and carries it into the washing solution, and prevents it from sticking to the fabric again. Therefore, the fabric is completely cleaned from dirt.

Several physical problems can be experienced with soap based liquid detergents. For example, it is quite difficult to prepare a physically stable liquid composition which has a suitable viscosity or which does not gelate. European Patent Document no EP1689843B1, an application known in the state of the art, discloses a liquid detergent formula comprising surfactant material other than soap, a fatty acid soap, perfume, dye, enzyme and an antioxidant material. However, in the liquid detergent formula obtained in this technique, it is concluded that phase separation has been observed even if it is small as a result of two week stability process (at 37°C), and therefore the formula is not stable.

United States Patent Document no US9150818B2, an application known in the state of the art, discloses a concentrated detergent which has laundry cleaning property and which can be stable both in liquid and solid form. In this composition, anionic filling material containing boron, filling material containing carbonate and percarbonate, soap consisting of carboxylic acids having a carbon number of C 6 - C20, emulsifier and enzyme were used. Therefore, the final product which is obtained is not a herbal and natural product since it has a formulation formed with additives and other additional components. Summary of the Invention

With the present invention, a soap based liquid detergent formulation has been developed which has high washing and cleaning performance, has no viscosity (300 - 3000 cp) and no gelation problems, and which is physically stable at low and high temperatures (5°C - 50°C).

Our invention relates to the production of natural herbal soap based liquid detergent which can be used for washing and cleaning purposes in laundry by adding thickeners and chelating raw materials to the natural soap form produced after saponification of vegetable oil and / or fatty acids with a strong and/or weak base.

By means of the present invention, a herbal and natural detergent formula has been developed which is biodegradable, which is physically stable at temperature ranges of 5°C - 50°C, which has high washing performance at different water hardness degrees such as 7-32 French Hardness by liquefying soap form obtained with chemical reaction instead of current synthetic liquid detergents that can be used in hand washing and washing machines.

Detailed Description of the Invention The inventive method for obtaining soap based natural liquid detergent, which is herbal, biodegradable; physically stable at temperature ranges of 5°C - 50°C, which has high washing performance at 7-32 French Hardness, comprises the steps of

i. preparing vegetable fatty acid solution, base solution/basic material and salt solution, ii. mixing vegetable fatty acid solution with base and salt solutions at 80°C for performing saponification reaction,

iii. adding thickener and chelating agent to the solution formed by mixing vegetable fatty acid solution with base and salt solutions, iv. cooling the resulting product to a temperature below 35°C.

In one embodiment of the invention, vegetable fatty acid chains between C8 - C18 are used as the fatty acid contained in the vegetable fatty acid solution. Preferably among the fatty acids in this range, vegetable fatty acid chains between C 12-08 are used. In this context, at least one fatty acid selected from the group consisting of caprylic acid (C 8 Hi 6 0 2 ), capric acid (CioH 2 o0 2 ), lauric acid (Ci 2 H 24 0 2 ), myristic acid (C |4 H 28 0 2) , palmitic acid (Ci 6 H 32 0 2 ), stearic acid (Ci 8 H 36 0 2 ), oleic acid (C I8 H 34 0 2 ), linoleic acid (Ci 8 H 32 0 2 ) or linolenic acid (Ci 8 H 3 o0 2 ) fatty acids can be used within the scope of the invention. Among these, a fatty acid selected preferably from a group lauric acid (Ci 2 H 24 0 2 ), myristic acid (Ci 4 H 28 0 2 ), palmitic acid (C |6 H 32 0 2), among vegetable saturated fatty acids, and mixtures thereof are used. In mixture of lauric acid (Ci 2 H 24 0 2 ), myristic acid (Ci 4 H 28 0 2 ) and palmitic acid (C I6 H 32 0 2 ), respectively the mixing ratios by mass are in range of 1,0% - 50,0 , in range of 1,0% - 20,0, in range of 1,0% - 20,0; preferably in range of 5,0% - 40,0, in range of 3,0% - 15,0, in range of 3,0% - 10,0 ; and more preferably in range of 10,0% - 30,0, in range of 3,0% - 10,0, in range of 4,0 %- 8,0. The mixing ratios of lauric acid and myristic acid, which is another mixture that is used, are respectively in range of 10,0% - 30,0, and in range of 3,0 %- 10,0. The mixing ratios of lauric acid and palmitic acid, which is another mixture that is used, are respectively in range of 10,0% - 30,0, and in range of 3,0 %- 10,0.

In one embodiment of the invention, at least one base solution/basic material selected from the group consisting of potassium hydroxide (KOH), sodium hydroxide (NaOH), monoethanolamine (H 2 NCH 2 CH 2 OH), diehtanolamine (HN(CH 2 CH 2 OH) 2 ), triethanolamine (N(CH 2 CH 2 OH) 3 ), ammonia (NH 3 ), and a combination thereof is used. Preferably potassium hydroxide (KOH) is used as the said basic material. The ratio of the amount of basic material used to the total mixture is in the range of 1.0 - 30.0% by mass, preferably in the range of 5.0 to 20.0%, and more preferably in the range of 7.0 to 10.0%.

In one embodiment of the invention, the solutions of at least one of sodium chloride (NaCl), sodium sulfate (NaS0 4 ) and potassium chloride (KC1) salts is used as salt solution. Preferably sodium chloride (NaCl) is used as sodium solution.

In one embodiment of the invention, at least one of hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, acrylate copolymer emulsions and all other thickeners is used as thickener. Preferably, hydroxyethyl cellulose is used among these. The ratio of the thickener to the total mixture is in the range of 0.001 - 10.0% by mass and preferably in the range of 0.01 - 5.0%.

In one embodiment of the invention, at least one of EDTA derivatives or tetrasodium glutamate diacetate chelating agents are used as chelating agent. Preferably, tetrasodium EDTA, which is a derivative of EDTA, is used.

In one embodiment of the invention, after the step of “cooling the resulting product”, perfume is added into the cooled product. In one embodiment of the invention, after the step of“cooling the resulting product”, coloring agent is added into the cooled product. In one embodiment of the invention, after the step of “cooling the resulting product”, extract is added into the cooled product.

The inventive soap based natural liquid detergent developed to fulfil the objectives of the invention, is produced by steps of

- Preparing a vegetable fatty acid solution by using at least one of caprylic acid (C 8 Hi 6 0 2 ), capric acid (C10H20O2), lauric acid (C12H24O2), myristic acid (C 14 H 28 O 2 ), palmitic acid (C 16 H 32 O 2 ), stearic acid (C 18 H 36 O 2 ), oleic acid (C 18 H 34 O 2 ), linoleic acid (C 18 H 32 O 2 ) or linolenic acid (C 18 H 30 O 2 ) fatty acids, and base and aqueous salt solution by selecting at least one of potassium hydroxide (KOH), sodium hydroxide (NaOH), monoethanolamine (H 2 NCH 2 CH 2 OH), diethanolamine

(HN(CH 2 CH 2 OH) 2 ), triethanolamine (N(CH 2 CH 2 OH) 3 ) or ammonia (NH 3 ) bases and at least one of sodium chloride (NaCl), sodium sulfate (NaSCE) and potassium chloride (KC1) salts,

- mixing vegetable fatty acid solution with base and salt solutions at 80°C for performing saponification reaction,

- adding one or several thickeners selected from at least one of hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, acrylate copolymer emulsions and all other thickeners, and chelating agents such as EDTA derivatives or Tetrasodium Glutamate Diacetate into the mixed solution,

- cooling the resulting final product below 35°C,

- preferably adding components such as perfume, coloring agent, or extract into the cooled product.

Natural herbal soap based liquid detergent which can be used in hand or machine washing is produced by adding other components such as thickener, chelating agent, perfume, dye and extract into natural soap formed after saponification of vegetal oils and/or fatty acids with a weak and/or strong base at high pH values (pH 8,0 - 11,0).

The inventive production method is comprised of steps below, respectively:

- Preparing vegetable fatty acid solution.

- The vegetable fatty acids mentioned in the first step are preferably caprylic acid (C 8 H 16 O 2 ), capric acid (C 10 H 20 O 2 ), lauric acid (C 12 H 24 O 2 ), myristic acid (C 14 H 28 O 2 ), palmitic acid (C 16 H 32 O 2 ), stearic acid (C 18 H 36 O 2 ), oleic acid (C 18 H 34 O 2 ), linoleic acid (C 18 H 32 O 2 ), linolenic acid (C 18 H 30 O 2 ).

- Preparing base and salt solution.

- Base solution mentioned in the third step is preferably potassium hydroxide (KOH), sodium hydroxide (NaOH), monoethanolamine

(H 2 NCH 2 CH 2 OH), diethanolamine (HN(CH 2 CH 2 OH) 2 ), triethanolamine (N(O¾Oί 2 0H) 3 ), ammonia (NH 3 ). Salt solution is preferably sodium chloride (NaCl), sodium sulfate (NaS0 4 ), potassium chloride (KC1).

- Performing saponification reaction by mixing vegetable fatty acid solution with base and salt solutions at 80°C.

- Adding thickeners and chelating agents.

- The thickeners mentioned in sixth step are preferably hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, acrylate copolymer emulsions and all other thickeners. Preferably EDTA derivatives, tetrasodium glutamate diacetate are the chelating agents.

- Adding thickeners and chelating agents into the vegetable fatty acid solution and salt solution mixture.

- Adding other components such as perfume, dye, extract into the final formula by cooling it.