HK1160775A - Use of tea polyphenols and/or pigments as dyes and products thereof - Google Patents

Description

Use of tea polyphenol and/or tea pigment as dye and product thereof

Technical Field

The invention belongs to the technical field of cosmetic industry, and particularly relates to application of tea polyphenol and/or an oxidation product of the tea pigment as a dye in a product for dyeing human or animal hair, and a hair dyeing product containing the tea polyphenol and/or the oxidation product of the tea pigment as the dye.

Background

With the improvement of living standard of people, the hair dyeing becomes a method for people to pursue fashion and beauty. The hair dyes sold in the current market can be divided into three types according to the used raw materials: firstly, the chemically synthesized hair dye occupies most of market shares, and harmful substances such as thioglycollic acid, p-phenylenediamine, hydrogen peroxide and the like are added; secondly, the chemically synthesized hair dye with a natural concept occupies a small amount of market, wherein some botanical concept components are added, and the hair dye also contains p-phenylenediamine and the like; and thirdly, the natural hair dye occupies a very small amount of market. The first two hair dyes are convenient and quick to use, but have high sensitization and potential carcinogenicity, and damage hair quality. However, the natural blackening agent in the current market is safe and non-irritant, such as a three-essence sorghum red pigment natural hair dye, a beneficial product natural hair dye, a geriatric gallnut natural hair dye, a clove hair dye and the like produced in China, which are respectively three-dosage form or two-dosage form products, but because of the limitation of compatibility among the used active ingredients, the agents are difficult to prepare into a homogeneous composition mixed together in the preparation process, or the agents are difficult to obtain the required effect by only once smearing after being mixed in the actual hair dyeing operation process, so that the smearing and hair washing are all required for two times or more, the operation is very complicated, the hair dyeing time is as long as about 2.5 hours, and the acceptance of consumers is poor.

Tea polyphenols are a mixture of condensed ring aromatic hydrocarbon substances extracted from tea leaves, and these condensed ring aromatic hydrocarbon substances can be classified into flavanols, hydroxy- [4] -flavanols, anthocyanins, flavonoids, flavonols, phenolic acids, etc. according to their chemical structures. Wherein, flavanols (mainly catechins) are the most important and account for about 60 to 80 percent of the total amount of polyphenols; the catechin mainly comprises Epigallocatechin (EGC), Epicatechin (EC), epigallocatechin gallate (EGCG), epicatechin gallate (ECG) and other monomers, and has the following structural formula:

1.R1＝R2＝H Epicatechin

2.R1＝＝OH，R2＝H Epigallocatechin

3.R1＝H，R2＝galloyl Epicatechin gallate

4.R1＝OH，R2＝galloyl Epigallocatechin gallate。

the tea pigment is prepared by oxidizing catechin and its derivatives in tea, and has molecular structure maintaining the mother-nucleus characteristics of catechin. Tea pigments are also complexes, including theaflavins, thearubigins and theabrownins. The tea pigment can be separated and purified from tea leaves or prepared by using an in-vitro simulated oxidation system. Tea polyphenol and its oxide (tea pigment) have many important biological and pharmacodynamic activities, mainly including antioxidation, cardiovascular protection, prevention and treatment of radiation injury, antianaphylaxis, inhibition and resistance to virus and bacteria, diuresis, fatigue relief, beauty and skin care, tooth protection, eyesight improvement, refreshment and other effects. At present, hair dyeing products claim to contain tea polyphenol for resisting allergy, but the application of the tea polyphenol and/or the oxide thereof (tea pigment) as a dye molecule to the aspect of hair dyeing is not reported.

Therefore, the development of a use of tea polyphenol and/or tea pigment as a dye active substance for dyeing human or animal hair and a corresponding product thereof can meet the market demand which is not met yet.

Disclosure of Invention

The present inventors have surprisingly found that tea polyphenols or its oxidation products, i.e. tea pigments, can be used as dye actives in the preparation of products for dyeing animal or human hair. The mechanism for the use of the present invention is that tea polyphenols or its oxidation product tea pigments can react with metal ions to form coloured complexes, for example with iron ions to form black complexes. Therefore, human and animal hair can be dyed from white to other colors, such as black, by using tea polyphenol naturally present in tea leaves and/or tea pigment, which is an oxidation product thereof, as a dye active substance and using a metal salt as a mordant active substance. Based on the above findings, the present inventors have completed the present invention.

In one aspect, the present invention relates to the use of tea polyphenols and/or its oxidation product tea pigment as a dye active in combination with a metal salt for dyeing human or animal hair, or its use in the preparation of a product for dyeing human or animal hair.

In one embodiment of this aspect, wherein the tea polyphenol is selected from one of the polyphenols, flavanols, anthocyanins, flavonoids, flavonols, phenolic acids, and the like, or a mixture of any two or more thereof in tea.

In another embodiment of this aspect, wherein said tea polyphenol is a flavanol selected from the group consisting of epigallocatechin, epicatechin, epigallocatechin gallate, epicatechin gallate and the like, or a mixture of any two or more thereof.

In another embodiment of this aspect, wherein said tea pigment is selected from one of theaflavin, thearubigin and theabrownin, or a mixture of any two or more thereof.

In another embodiment of this aspect, wherein the metal salt is a divalent metal salt.

In another embodiment of this aspect, wherein the divalent metal salt is a ferrous salt.

In another embodiment of this aspect, wherein the ferrous salt is selected from one of ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous gluconate, ferrous lactate, ferrous fumarate, and the like, or a mixture of any two or more thereof.

In any one of the above embodiments of this aspect, wherein the weight of the tea polyphenols calculated as catechins is 0.5-15%, 1-10%, 2-8%, 3-5% or 4% of the total weight of the hair coloring product.

In any one of the above embodiments of this aspect, wherein the weight of the tea pigment is 0.5 to 15%, 1 to 10%, 2 to 8%, 3 to 5% or 4% by weight of the total weight of the hair coloring product, calculated as theaflavins.

In another aspect, the invention relates to a product for coloring human or animal hair comprising an effective amount of tea polyphenols and/or its oxidation products tea pigments and an effective amount of a metal salt together with acceptable auxiliary substances in the hair coloring product.

In one embodiment of this aspect, the metal salt is a divalent metal salt.

In another embodiment of this aspect, the divalent metal salt is a ferrous salt.

In another embodiment of this aspect, the ferrous salt is selected from one of ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous gluconate, ferrous lactate, ferrous fumarate, and the like, or a mixture of any two or more thereof.

In any one of the above embodiments of this aspect, wherein the weight of the tea polyphenols calculated as catechins is 0.5-15%, 1-10%, 2-8%, 3-5% or 4% of the total weight of the hair coloring product.

In any one of the above embodiments of this aspect, wherein the weight of the tea pigment is 0.5 to 15%, 1 to 10%, 2 to 8%, 3 to 5% or 4% by weight of the total weight of the hair coloring product, calculated as theaflavins.

In any of the above embodiments of this aspect, the acceptable auxiliary substances in the hair colouring product include hair softeners, which may include, for example, N-acetylcysteine, sodium sulfite, sodium lauryl sulfate, carbomer, disodium edetate and monoethanolamine.

In a further aspect, the present invention relates to a combination product for dyeing human or animal hair comprising a hair softening formulation, a dye formulation and a mordant formulation, and instructions on how to use the hair softening, dye and mordant formulation, wherein the dye formulation comprises an effective amount of tea polyphenols and/or oxidation products thereof tea pigments and the mordant formulation comprises an effective amount of a metal salt.

In one embodiment of this aspect, the metal salt is a divalent metal salt.

In another embodiment of this aspect, the divalent metal salt is a ferrous salt.

In another embodiment of this aspect, the ferrous salt is selected from one of ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous gluconate, ferrous lactate, ferrous fumarate, and the like, or a mixture of any two or more thereof.

In any one of the above embodiments of this aspect, wherein the weight of the tea polyphenols calculated as catechins is 0.5-15%, 1-10%, 2-8%, 3-5% or 4% of the total weight of the hair coloring product.

In any one of the above embodiments of this aspect, wherein the weight of the tea pigment is 0.5 to 15%, 1 to 10%, 2 to 8%, 3 to 5% or 4% by weight of the total weight of the hair coloring product, calculated as theaflavins.

In a particular embodiment of this aspect, the hair softening formulation comprises N-acetylcysteine, sodium sulfite, sodium lauryl sulfate, carbomer, disodium edetate, and monoethanolamine in amounts effective to soften hair; the dye preparation comprises effective amount of tea polyphenol and/or tea pigment, cetyl/stearyl alcohol, ceteareth-6, sodium dodecyl sulfate, lanolin, white vaseline, sodium sulfite, disodium ethylenediamine tetraacetic acid, methyl paraben and propyl paraben; and the mordant formulation comprises effective amounts of ferrous sulfate, cetostearyl alcohol, ceteareth-6, methylparaben, propylparaben, and cysteine hydrochloride.

In a further aspect, the present invention relates to a combination product for dyeing human or animal hair comprising a hair softening formulation and a hair dyeing formulation comprising an effective amount of tea polyphenols and/or oxidation products thereof tea pigments and an effective amount of a metal salt, together with instructions on how to use the hair softening and hair dyeing formulations.

In one embodiment of this aspect, the metal salt is a divalent metal salt.

In another embodiment of this aspect, the divalent metal salt is a ferrous salt.

In another embodiment of this aspect, the ferrous salt is selected from one of ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous gluconate, ferrous lactate, ferrous fumarate, and the like, or a mixture of any two or more thereof.

In any one of the above embodiments of this aspect, wherein the weight of the tea polyphenols calculated as catechins is 0.5-15%, 1-10%, 2-8%, 3-5% or 4% of the total weight of the hair coloring product.

In any one of the above embodiments of this aspect, wherein the weight of the tea pigment is 0.5 to 15%, 1 to 10%, 2 to 8%, 3 to 5% or 4% by weight of the total weight of the hair coloring product, calculated as theaflavins.

In a particular embodiment of this aspect, the hair softening formulation comprises N-acetylcysteine, sodium sulfite, sodium lauryl sulfate, carbomer, disodium edetate, and monoethanolamine in amounts effective to soften hair; and the hair dyeing preparation comprises effective amounts of tea polyphenol, ferrous sulfate, cetyl/stearyl alcohol, ceteareth-6, sodium dodecyl sulfate, cysteine hydrochloride, methyl paraben and propyl paraben.

Unless otherwise defined explicitly herein, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art or ordinary skill in the art.

The term "effective amount" as used herein refers to the amount of a component to which the term corresponds necessary to effect its function.

The term "tea polyphenol" as used herein refers to one or a mixture of more than one of polyphenols, flavanols (mainly catechins), anthocyanins, flavonoids, flavonols, phenolic acids, etc., in tea leaves, or may refer to only one or a mixture of more than one of monomers, such as catechins, EGC, EGCG, ECG, etc.

The term "tea pigment" as used in the present invention refers to an oxidation product of tea polyphenol, and may be one or a mixture of more of theaflavin, thearubigin and theabrownin.

The tea polyphenol and the catechin can be derived from natural plant tea, can be prepared by various methods known in the prior art, and are sold in commercial products, wherein the content of the catechin can reach 5-98% (for example, Ling Yichun, etc., Chinese tea 2010, 5: 12-14; Li Da Xiang, etc., natural product research and development, 2006, 18: 171-. These substances can be identified by methods and techniques known in the art.

The tea polyphenol oxidation product (namely tea pigment) can be derived from natural plant tea, namely can be separated and purified from the tea, and can also be prepared by utilizing an in vitro simulated oxidation system (for example, Zhang Jian Yong and the like, Chinese tea, 2009, 9: 8-10. the tea pigment can also be prepared by various methods known in the prior art and sold in commodities, and the purity of the tea pigment can reach more than 90 percent.

According to the present invention, the tea polyphenol and/or its oxidation product, i.e., tea pigment, can be used in combination with other natural extracts (e.g., gallnut extract, tannin, gallic acid, etc.) as a dye for dyeing black hair.

In the practice of the present invention, the product or combination product for coloring human or animal hair may be formulated as a three-agent product.

The first agent is called hair softener (or softening preparation), because the speed of tea polyphenol and/or oxidation products thereof, namely tea pigment, entering the hair as dye molecules is slow, the hair can be firstly softened when the hair dyeing agent is implemented, so that the dye molecules can easily enter the hair to shorten the hair dyeing time. The hair softener can adopt the softener of natural hair dye on the market, such as softening preparations of 'Yipin' brand natural hair dye, and 'Ladies' brand gallnut natural hair dye and the like. Of course, the present invention can be carried out without using the softening agent and the same effects can be obtained.

The second agent is called a dye agent (or called a dye preparation) and plays a role in developing color. Can be prepared into any dosage form suitable for hair dyeing, such as solution, emulsion, paste, cream or gel, by adding tea polyphenols and/or tea polyphenol oxide (tea pigment) as main active component into conventional topical skin product which can be used (for example, has no adverse side effect such as skin irritation) when contacting with skin, such as diluent, surfactant, thickener, etc. used in cosmetic.

The third agent is mordant (or metal ion agent or mordant preparation), wherein the metal ion is chelated with the dye active substance to form larger molecule, which changes the display color of the dye and makes the molecule larger, so that the molecule is less prone to exude out of the hair after hair dyeing, thereby achieving the purpose of permanent hair dyeing. The mordant takes a compound containing ferrous ions as a main active component, and the ferrous ions are oxidized into ferric ions by air during hair dyeing so as to generate a black complex with tea polyphenol and an oxidation product thereof, namely tea pigment. Substances which can be used (e.g., do not cause side effects such as irritation to the skin) when they are brought into contact with the skin, such as diluents, surfactants, thickeners, etc., which can be used, for example, in cosmetics, and which are conventionally used, particularly in skin external products, can be added to make them into any form suitable for hair dyeing, such as a solution, cream, paste, cream, or gel form.

In the practice of the present invention, the product or combination product for coloring human or animal hair may also be formulated as a two-agent product.

The first dose may be the same as the first dose in a three-dose product, i.e., the softening formulation.

The second agent is prepared by mixing the dye preparation and mordant preparation (i.e. metal ion agent) in the three-agent type product to prepare a homogeneous stable composition, i.e. hair dyeing preparation, wherein, tea polyphenol and/or oxidation product thereof, i.e. tea pigment, is used as the dye active substance, and metal ion (e.g. ferrous ion) is used as the mordant active substance, and can be added into conventional substances which can be used (e.g. do not generate side effects such as irritation to skin) when contacting with skin, especially diluents, surfactants, thickeners, etc. which can be used in cosmetics, to prepare into any dosage form suitable for hair dyeing, such as solution, emulsion, cream or gel.

The use of the invention or the use of the products and combinations of the invention may be carried out by methods and means conventional in the art.

The product, the combined product and the application of the invention not only have good safety, but also can realize the synchronous operation of hair softening and dyeing, the preparation for softening the hair, the dye preparation and the mordant preparation can be respectively packaged and stored when being stored, and can be jointly coated on the hair when being used, and the white hair can be dyed into the hair with black color and the like, thereby greatly simplifying the operation steps and shortening the operation time.

The tea polyphenol and the oxide thereof (tea pigment) can be used as dye for hair dyeing products when being prepared into any dosage form. Any product, if its components contain tea polyphenol and/or tea pigment or are prepared from tea polyphenol and/or tea pigment only, on its package or label such as instructions, and on any other promotional material, as long as it (or catechin) is noted or suggested to be used as a dye active, falls within the scope of the present invention.

The invention discloses the use of tea polyphenol and its oxide (tea pigment) as dye molecule in hair dyeing products for the first time, so that the product prepared by mixing tea polyphenol and/or tea polyphenol oxide (tea pigment) with other active components or auxiliary materials is in the protection scope of the invention as long as the product is used for dyeing hair.

Detailed Description

The present invention is further illustrated by the following specific examples, comparative examples and test examples, but it should be understood that these examples, comparative examples and test examples are only for illustrating the present invention in more detail and are not to be construed as limiting the present invention in any way.

Although many materials and methods of operation are known in the art for the purpose of carrying out the invention, the invention is nevertheless described herein in as detail as possible. It will be clear to those skilled in the art that, in the following, the materials used and the methods of operation are well known in the art, if not specifically stated.

Example 1

1) Softening preparation (prepared according to total amount of 100 g): fully and uniformly mixing 6g of N-acetylcysteine, 1g of sodium sulfite, 4g of sodium dodecyl sulfate, 0.5g of carbomer and 0.2g of disodium ethylene diamine tetraacetate, then adding a proper amount of monoethanolamine to adjust the pH value to make the final pH value of the product equal to 9.5 (test paper), adding the balance of deionized water to 100g, uniformly mixing and stirring to prepare the gel.

2) Dye preparations (prepared in a total amount of 100 g): 4g of tea polyphenol (purchased from Piano biotechnologies Co., Ltd., Zhejiang province), 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 2g of sodium dodecyl sulfate, 2g of lanolin, 2g of white vaseline, 0.2g of sodium sulfite, 0.2g of disodium ethylenediamine tetraacetate, 0.25g of methyl paraben and 0.15g of propyl paraben are fully and uniformly mixed, and then the rest of deionized water is added, and the mixture is uniformly mixed and stirred to prepare the ointment.

3) Mordant preparation (prepared according to total amount of 100 g): fully and uniformly mixing 5g of ferrous sulfate, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 0.25g of methyl paraben, 0.15g of propyl paraben and 0.5g of cysteine hydrochloride, then adding the balance of deionized water, and uniformly mixing and stirring to prepare the ointment.

4) Hair dyeing experiment of hair bundle: when the hair dye is used, the first agent, the second agent and the third agent are added into a non-metal container in equal volume, the non-metal rod is used for stirring uniformly without washing hair, the mixed hair dye is repeatedly and uniformly smeared on hair by a hair comb, the hair dye stays for 20-30 minutes, the hair is washed by warm water, and the hair dye is air-dried or blow-dried.

The results show that the hair dyeing product of the embodiment has good color fastness of the dyed hair bundle and stable preparation. Specific experimental results are described in the following test examples.

Example 2

1) Softening preparation (prepared according to total amount of 100 g): fully and uniformly mixing 6g of N-acetylcysteine, 1g of sodium sulfite, 4g of sodium dodecyl sulfate, 0.5g of carbomer and 0.2g of disodium ethylene diamine tetraacetate, then adding a proper amount of monoethanolamine to adjust the pH value to make the final pH value of the product equal to 9.5 (test paper), adding the balance of deionized water to 100g, uniformly mixing and stirring to prepare the gel.

2) Dye preparations (prepared in a total amount of 100 g): fully and uniformly mixing 2g of tea polyphenol (purchased from Zhejiang Paro biotechnology Co., Ltd.), 2g of tea pigment (purchased from Zhejiang Paro biotechnology Co., Ltd.), 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 2g of sodium dodecyl sulfate, 2g of lanolin, 2g of white vaseline, 0.2g of sodium sulfite, 0.2g of disodium ethylenediamine tetraacetate, 0.25g of methyl paraben and 0.15g of propyl paraben, then adding the balance of deionized water, mixing and stirring uniformly, and preparing the ointment.

3) Mordant preparation (prepared according to total amount of 100 g): fully and uniformly mixing 5g of ferrous sulfate, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 0.25g of methyl paraben, 0.15g of propyl paraben and 0.5g of cysteine hydrochloride, then adding the balance of deionized water, and uniformly mixing and stirring to prepare the ointment.

4) Hair dyeing experiment of hair bundle: when the hair dye is used, the first agent, the second agent and the third agent are added into a non-metal container in equal volume, the non-metal rod is used for stirring uniformly without washing hair, the mixed hair dye is repeatedly and uniformly smeared on hair by a hair comb, the hair dye stays for 20-30 minutes, the hair is washed by warm water, and the hair dye is air-dried or blow-dried.

The results show that the hair dyeing product of the embodiment has good color fastness of the dyed hair bundle and stable preparation. Specific experimental results are described in the following test examples.

Example 3

1) Softening preparation (prepared according to total amount of 100 g): fully and uniformly mixing 6g of N-acetylcysteine, 1g of sodium sulfite, 4g of sodium dodecyl sulfate, 0.5g of carbomer and 0.2g of disodium ethylene diamine tetraacetate, then adding a proper amount of monoethanolamine to adjust the pH value to make the final pH value of the product equal to 9.5 (test paper), adding the balance of deionized water to 100g, uniformly mixing and stirring to prepare the gel.

2) Dye preparations (prepared in a total amount of 100 g): 4g of tea pigment (purchased from Piano biotechnologies Co., Ltd., Zhejiang province), 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 2g of sodium dodecyl sulfate, 2g of lanolin, 2g of white vaseline, 0.2g of sodium sulfite, 0.2g of disodium ethylenediamine tetraacetate, 0.25g of methyl paraben and 0.15g of propyl paraben are fully and uniformly mixed, and then the rest of deionized water is added, and the mixture is uniformly mixed and stirred to prepare the ointment.

3) Mordant preparation (prepared according to total amount of 100 g): fully and uniformly mixing 5g of ferrous sulfate, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 0.25g of methyl paraben, 0.15g of propyl paraben and 0.5g of cysteine hydrochloride, then adding the balance of deionized water, and uniformly mixing and stirring to prepare the ointment.

4) Hair dyeing experiment of hair bundle: when the hair dye is used, the first agent, the second agent and the third agent are added into a non-metal container in equal volume, the non-metal rod is used for stirring uniformly without washing hair, the mixed hair dye is repeatedly and uniformly smeared on hair by a hair comb, the hair dye stays for 20-30 minutes, the hair is washed by warm water, and the hair dye is air-dried or blow-dried.

The results show that the hair dyeing product of the embodiment has good color fastness of the dyed hair bundle and stable preparation.

Example 4

1) Softening preparation (prepared according to total amount of 100 g): fully and uniformly mixing 6g of N-acetylcysteine, 1g of sodium sulfite, 4g of sodium dodecyl sulfate, 0.5g of carbomer and 0.2g of disodium ethylene diamine tetraacetate, then adding a proper amount of monoethanolamine to adjust the pH value to make the final pH value of the product equal to 9.5 (test paper), adding the balance of deionized water to 100g, uniformly mixing and stirring to prepare the gel.

2) Dye preparations (prepared in a total amount of 100 g): 4g of tea polyphenol (purchased from Piano biotechnologies Co., Ltd., Zhejiang province), 2g of gallic acid, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 2g of sodium dodecyl sulfate, 2g of lanolin, 2g of white vaseline, 0.2g of sodium sulfite, 0.2g of disodium ethylenediamine tetraacetate, 0.25g of methyl paraben and 0.15g of propyl paraben are fully and uniformly mixed, and then the rest of deionized water is added, mixed and uniformly stirred to prepare the ointment.

3) Mordant preparation (prepared according to total amount of 100 g): fully and uniformly mixing 5g of ferrous sulfate, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 0.25g of methyl paraben, 0.15g of propyl paraben and 0.5g of cysteine hydrochloride, then adding the balance of deionized water, and uniformly mixing and stirring to prepare the ointment.

4) Hair dyeing experiment of hair bundle: when the hair dye is used, the first agent, the second agent and the third agent are added into a non-metal container in equal volume, the non-metal rod is used for stirring uniformly without washing hair, the mixed hair dye is repeatedly and uniformly smeared on hair by a hair comb, the hair dye stays for 20-30 minutes, the hair is washed by warm water, and the hair dye is air-dried or blow-dried.

The results show that the hair dyeing product of the embodiment has good color fastness of the dyed hair bundle and stable preparation.

Example 5

1) Softening preparation (prepared according to total amount of 100 g): 6g of N-acetylcysteine, 1g of sodium sulfite, 4g of sodium dodecyl sulfate, 0.5g of carbomer and 0g of disodium ethylene diamine tetraacetate.2g of the mixture is fully and uniformly mixed, then a proper amount of monoethanolamine is added to adjust the pH value, so that the final pH value of the product is 9.5 (test paper), the balance of deionized water is added to 100g, and the gel is prepared by uniformly mixing and stirring.

2) Hair dyeing preparation (prepared according to total amount of 100 g): 4g of tea polyphenol (purchased from Piano biotechnologies Co., Ltd., Zhejiang), 4g of ferrous sulfate, 5g of hexadecanol/octadecanol, 5g of ceteareth-6, 4g of sodium dodecyl sulfate, 0.5g of cysteine hydrochloride, 0.25g of methyl paraben and 0.15g of propyl paraben are fully and uniformly mixed, and then the rest of deionized water is added, mixed and stirred uniformly to prepare the ointment.

3) Hair dyeing experiment of hair bundle: when the hair dye is used, the first agent and the second agent are added into a non-metal container in equal volume, the non-metal rod is used for stirring uniformly without washing hair, the mixed hair dye is repeatedly and uniformly coated on the hair by a hair comb, the hair is kept for 20-30 minutes, the hair is washed by warm water, and the hair dye is air-dried or blow-dried.

The results show that the hair dyeing product of the embodiment has good color fastness of the dyed hair bundle and stable preparation.

Comparative example 1: sanjing plant hair dye

1. The plant hair dye containing three essential ingredients is a product purchased from the market, and is a three-agent product, including a No. 1 hair dye composition, a No. 2 hair dye composition and a No. 3 hair dye composition. The hair dyeing composition No. 1 is liquid, and the hair dyeing composition No. 2 and the hair dyeing composition No. 3 are powder.

2) Hair dyeing experiment of hair tresses: the number 1 hair dyeing composition was poured into a clean non-metallic container, followed by sorghum essence, and mixed well. And (3) sufficiently coating the solution on hair by using a brush, repeatedly and uniformly coating, wearing a moisturizing cap, waiting for 25-30 minutes (the recommended temperature is not lower than 20 ℃), and then washing with warm water and wiping to dry. Pouring the No. 2 hair-dyeing composition (powder) into a clean non-metal container, adding 50ml of clear water, fully stirring and uniformly mixing, smearing the No. 2 hair-dyeing composition according to the same operation method of the No. 1 hair-dyeing composition, waiting for 10 minutes, then washing with warm water and wiping to dry. Hair dye composition No. 3 (powder) was used in the same manner as hair dye composition No. 2, and was allowed to wait for 10 minutes, then rinsed with warm water and wiped dry.

Comparative example 2: natural hair dye

1. The natural hair dye is a product purchased from the market, is a three-agent product, and comprises a No. 1 hair dye composition, a No. 2 hair dye composition and a No. 3 hair dye composition which are in liquid state.

2. Hair dyeing experiment of hair tresses: the hair is cleaned and dried by shampoo. The No. 1 hair dyeing composition is smeared on hair, a bath cap is worn after the hair dyeing composition is smeared uniformly repeatedly, a dry towel is covered on the bath cap, the hair dyeing composition is uniformly heated by electric air blowing, the temperature is kept slightly higher than the body temperature (not lower than 40 ℃), the hair dyeing composition is waited for 20-30 minutes, and then the hair dyeing composition is washed by warm water and wiped to be dry. And (3) coating the No. 2 hair dyeing composition according to the same operation method as the No. 1 hair dyeing composition, waiting for 15-20 minutes without wearing a shower cap or heating, and then washing with warm water and wiping to dry. The hair dyeing composition No. 3 was used in the same operation as the hair dyeing composition No. 2, waiting for 10 minutes, and then the hair was rinsed clean with warm water.

Comparative example 3: clove hair dye

1. The clove hair dye is a product purchased from the market, is a product in two dosage forms, comprises a No. 1 hair dye composition and a No. 2 hair dye composition, and is in a liquid state.

2. Hair dyeing experiment of hair tresses: the hair is cleaned and dried by shampoo. And (3) coating the No. 1 hair dyeing composition on hair, repeatedly and uniformly coating, wearing a shower cap, heating by using a steam engine, waiting for 25-30 minutes, washing by using warm water, and wiping to dry. The No. 2 hair dyeing composition is coated according to the same operation method as the No. 1 hair dyeing composition, a steam engine is directly used for heating without wearing a shower cap, the time is waited for 20 minutes, and then the hair is washed clean by warm water.

Test examples

Color and firmness test and formulation stability test of hair tresses

1. Test method：

Hair tie: white hair from the apical part of the same person with white hair.

Colour of hair bundle: the dyed hair was examined by a colorimeter while visually observing.

Firmness of hair bundle: after dyeing, the hair is placed under the sunlight for irradiation, and the sunlight fastness of the hair is inspected; the dyed hair was washed with a commercially available shampoo and the fastness to washing was examined.

Formulation stability: the samples according to example 1, example 2, comparative example 1, comparative example 2 and comparative example 3 were stored in an oven at 40 ℃ for two months, taken out and stored in a refrigerator at 0 ℃ and the state of the samples was observed two months later and a hair dyeing test was performed.

Can be repeatedly used: after the sample was opened, it was left for 1 month, 2 months, 4 months and 6 months, and the state of the sample was observed and a hair dyeing test was performed.

2. Test results：

The hair dyeing was carried out and the stability and repeated use of five formulations were examined according to the methods of use of example 1, example 2, comparative example 1, comparative example 2 and comparative example 3, respectively.

Example 1 hair strand coloring results for the hair dye: the result of the colorimeter is black, and the color is black when the colorimeter is observed by naked eyes; the fastness test result shows that the color of the fabric does not fade after being irradiated for 50 days under sunlight and washed for 50 times. The softening preparation, the dye preparation and the mordant preparation are subjected to stability experiments, and the appearance of the softening preparation, the dye preparation and the mordant preparation is not obviously changed before and after the stability experiment investigation; and the hair dyeing result is consistent. The results of the repeated use test are: the appearance of the softening preparation is not obviously changed after the preparation is opened and placed for 1 month, 2 months, 4 months and 6 months, except for the part of the dye preparation and the mordant preparation which is contacted with the air at the opening end, the other parts are not obviously changed, and the hair dyeing result is consistent.

Example 2 hair strand coloring results for the hair dye are: the result of the colorimeter is black, and the color is black when the colorimeter is observed by naked eyes; the fastness test result shows that the color of the fabric does not fade after being irradiated for 50 days under sunlight and washed for 50 times. The softening preparation, the dye preparation and the mordant preparation are subjected to stability experiments, and the appearance of the softening preparation, the dye preparation and the mordant preparation is not obviously changed before and after the stability experiment investigation; and the hair dyeing result is consistent. The results of the repeated use test are: the appearance of the softening preparation is not obviously changed after the preparation is opened and placed for 1 month, 2 months, 4 months and 6 months, except for the part of the dye preparation and the mordant preparation which is contacted with the air at the opening end, the other parts are not obviously changed, and the hair dyeing result is consistent.

The strand dyeing results of the hair dye of comparative example 1 were: dyeing hair at the temperature of 20 ℃ according to the specification, the coloring effect is not ideal, the coloring effect is more satisfactory at the temperature of 25 ℃, the result measured by a colorimeter is black, and the result is black when the result is observed by naked eyes; the fastness test result shows that the color of the fabric does not fade after being irradiated for 50 days under sunlight and washed for 50 times. Stability experiments are carried out on the No. 1 hair dyeing composition, the No. 2 hair dyeing composition and the No. 3 hair dye, the appearance of the No. 1 hair dyeing composition is remarkably thinned after the stability experiment investigation, and the No. 2 hair dyeing composition and the No. 3 hair dye have no obvious change; the result of dyeing at 25 ℃ is purple. The results of the repeated use test are: the No. 1 hair dyeing composition is turbid and discolored the next day after the preparation is opened and placed, the No. 2 hair dyeing composition (powder) and the No. 3 hair dye are discolored, and the hair dyeing result is light purple at 25 ℃.

The strand dyeing results of the hair dye of comparative example 2 were: the result of the colorimeter is black, and the color is black when the colorimeter is observed by naked eyes; the fastness test result shows that the color of the fabric does not fade after being irradiated for 50 days under sunlight and washed for 50 times. The No. 1 hair dyeing composition, the No. 2 hair dyeing composition and the No. 3 hair dye are subjected to stability experiments, and the appearances of the three parts are obviously thinned after the stability experiments are investigated; the result of the dyeing is purple. The results of the repeated use test are: the No. 1 hair dyeing composition, the No. 2 hair dyeing composition and the No. 3 hair dyeing agent are turbid and discolored the next day after the preparation is opened and placed, and the hair dyeing result is light purple.

Comparative example 3 hair strand dyeing results of the hair dye were: the result of the colorimeter is black, and the color is black when the colorimeter is observed by naked eyes; the fastness test result shows that the color of the fabric does not fade after being irradiated for 50 days under sunlight and washed for 50 times. Stability experiments are carried out on the No. 1 hair dyeing composition and the No. 2 hair dyeing composition, and the appearances of the two parts are obviously thinned after the stability experiments are investigated; the result of the dyeing is purple. The results of the repeated use test are: the two parts of the No. 1 hair dyeing composition and the No. 2 hair dyeing composition are turbid and discolored the next day after the preparation is opened and placed, and the hair dyeing result is light purple.

The above results show that hair dyed with the products of examples 1 and 2 has natural black color, and can be kept for about 50 days without fading, and the preparation has high stability and can be repeatedly used, compared with the control examples 1, 2 and 3.

The following table lists the differences in the manner of operation of the five formulations.

Note: "" indicates the time the hair dye stays on the hair; "" means including the amount of time required for the product to be dispensed, shampooed, applied and left on the hair.

As can be seen from the above table, according to the operation of examples 1 and 2, the hair softening and dyeing operations are performed simultaneously, and the hair softening preparation, the dye preparation and the mordant preparation can be separately packaged and stored, and when in use, they are combined together and applied to the hair, thereby greatly reducing the number of shampooing and applying, and thus greatly simplifying the operation steps and shortening the operation time.

Claims (10)

1. The use of tea polyphenols and/or tea pigments as dye active substances in combination with metal salts for dyeing human or animal hair or for the preparation of products for dyeing human or animal hair.

2. The use according to claim 1, wherein the tea polyphenol is selected from one of polyphenols, flavanols, anthocyanins, flavonoids, flavonols, phenolic acids and the like in tea leaves, or a mixture of any two or more thereof.

3. Use according to claim 2 wherein the tea polyphenol is a flavanol selected from one of epigallocatechin, epicatechin, epigallocatechin gallate and epicatechin gallate and the like, or a mixture of any two or more thereof.

4. Use according to claim 1 wherein the tea pigment is selected from one of theaflavin, thearubigin and theabrownin, or a mixture of any two or more thereof.

5. Use according to claim 1, wherein the metal salt is a divalent metal salt.

6. Use according to claim 5, wherein the divalent metal salt is a ferrous salt.

7. The use according to claim 6, wherein the ferrous salt is selected from one of ferrous sulfate, ferrous chloride, ferrous nitrate, ferrous gluconate, ferrous lactate, ferrous fumarate and the like, or a mixture of any two or more thereof.

8. Use according to any one of claims 1 to 7, wherein the weight of the tea polyphenols is 0.5-15%, 1-10%, 2-8%, 3-5% or 4% by weight of the total weight of the hair colouring product, calculated as catechins.

9. Use according to any one of claims 1 to 8 wherein the weight of the tea pigment is 0.5 to 15%, 1 to 10%, 2 to 8%, 3 to 5% or 4% by weight of the total weight of the hair colouring product, calculated as theaflavins.

10. A product for coloring human or animal hair comprising an effective amount of tea polyphenols and/or its oxidation products tea pigments and an effective amount of a metal salt together with acceptable auxiliary substances in the hair coloring product.