JPH02282315A - Additive for permanent waving solution - Google Patents

Abstract

PURPOSE:To obtain an additive for permanent waving solutions containing an organic acid, carbonate and excipient. CONSTITUTION:An additive containing an organic acid, such as tartaric, fumaric or succinic acid, a carbonate, such as sodium hydrogencarbonate, and an excipient (e.g. solid polyethylene glycol, starch or lactose). Further, a cationic surfactant (e.g. benzalkonium chloride) and hydrolyzed collagen can be contained therein for imparting rinsing effects thereto. The amounts of the blended ingredients based on 1 pt.wt. organic acid are 28-33 pts.wt. carbonate and 8-10 pts.wt. excipient and the additive is prepared in the form of tablet, powder, granule, etc. The additive for the permanent waving solutions can be added to the second solution just before use to provide more complete stopping effects on the first solution in a short time. Furthermore, the amount of potassium bromate which is an active ingredient used in the second solution can be reduced.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an additive for a perm solution.

(Prior art) Hair is mainly composed of keratin, which is a polymeric fiber consisting of many polypeptide chains forming a vertical axis and side chains such as cystine bonds, salt bonds, and hydrogen bonds connecting them. It is believed that Hair is made of keratin, which has this structure, so it is elastic and has the ability to quickly return to its original shape even if it is bent. The principle of permanent waving is to temporarily lose the restoring power of the hair by cutting the side chains, and then recombine the side chains at new positions to form desired waves. Based on this principle, a cold two-bath permanent waving agent consisting of two components, a first liquid and a second liquid, is currently widely used as a cold wave lotion used for permanent waving. This first liquid contains a reducing agent (thioglycolic acid or its salts, cysteine, etc.) as an active ingredient, and functions to cleave cystine bonds in the hair. Furthermore, the second liquid contains oxidizing agents (potassium bromate, sodium bromate, sodium perborate, etc.) as active ingredients, and its oxidizing action neutralizes the effects of the first liquid remaining on the hair. It works to stop the waves of the hair (this is called the "stopping effect") and to recombine the previously severed side chain bonds at new sites, thereby fixing the waves of the hair.

The second cold two-bath permanent waving agent
Liquids containing potassium bromate or sodium bromate as an oxidizing agent are often used (second liquid 80
Contains 6.0 to 6.5% of potassium bromate or thorium bromate in ~100 mρ; Japan Permanent Wave Liquid Industry Association voluntary standard). The pH of this second liquid must be adjusted to around 7.0 from the viewpoint of product stability, and for this purpose the pH is adjusted using a buffer solution. However, the oxidizing effect of potassium bromate or sodium bromate is more pronounced in an acidic region, and if the second liquid is used as it is, the oxidizing effect will be insufficient (the stopping effect will be insufficient). There is a problem that the perm processing time is long (low) and long.

Furthermore, since the oxidizing effect of the second liquid is not fully expressed, nearly twice the theoretical amount of potassium bromate, etc. is required to stop the action of the first liquid (see the above-mentioned voluntary standards). There's a problem.

(Problem to be solved by the invention) In conventional cold two-bath permanent waving agents, since the pH of the second liquid is around 7.0, its oxidizing effect cannot be fully exerted. , the stopping effect was not sufficient.

Therefore, the present invention achieves a complete stopping effect in a shorter time by fully exerting the oxidizing effect of the second liquid, and reduces the amount of active ingredients such as potassium bromate used in the second liquid. The purpose of the present invention is to provide an additive for a perm solution that can be used to make a permanent hair.

[Structure of the Invention] (Means and Effects for Solving the Problems) The additive for a perm liquid of the present invention is characterized in that it contains an organic acid, a carbonate, and an excipient.

The organic acid used in the present invention is the second liquid of a two-bath cold web solvent (in accordance with the voluntary standard of the Japan Permanent Wave Liquid Industry Association; potassium bromate or sodium bromate in the second liquid is 80 to 100rnj2). 5%). The organic acid is not particularly limited as long as it has a pH adjusting function, but it is preferably one that is soluble in the second liquid and as odorless as possible considering its intended use. Such organic acids include tartaric acid,
Examples include fumaric acid, succinic acid, and citric acid.

When the carbonate used in the present invention is added to the second liquid, the carbonate quickly generates carbon dioxide due to the presence of the organic acid and water in the second liquid, causing the perm liquid additive to disintegrate.
It is a component that acts as a disintegrant to promote dissolution. Examples of such carbonates include sodium hydrogen carbonate and anhydrous sodium carbonate.

The excipient used in the present invention is a component for binding and retaining the organic acid and carbonate, and for shaping the perm liquid additive of the present invention into a desired shape. Examples of such excipients include solid polyethylene glycol, starch, dextrin, and lactose.

In addition to the above-mentioned components, the additive for a perm solution of the present invention may further contain a cationic surfactant such as benzalkonium chloride and hydrolyzed collagen for the purpose of imparting a rinsing effect. In addition, other components such as colorants and fragrances can also be blended.

The blending ratio of each component constituting the permanent liquid phase additive of the present invention is not particularly limited. It is preferable to mix 28 to 33 parts by weight of carbonate and 8 to 10 parts by weight of excipient per 1 part by weight.

The dosage form of the permanent liquid phase additive of the present invention is not particularly limited, and can be made into any desired dosage form such as tablets, powders, and granules.

The perm liquid phase additive of the present invention is designed so that the pH of the second liquid during use is in the range of 4.5 to 5.5 in order to enhance the oxidation effect of the second liquid and to ensure safety for the scalp. It is preferable to use it.

(Example) Example 1 A uniform mixture of 55 mg of tartaric acid, 30 mg of sodium bicarbonate, and 5 mg of polyethylene glycol [molecular weight 6000] was compressed using a tablet machine to form a tablet of the present invention. A permanent liquid phase additive (approximately 80 mg) was obtained.

(Examples 2 to 5) Tablet-shaped permanent liquid phase additives of the present invention were obtained in the same manner as in Example 1 using each component in the amounts (unit: mg) shown in Table 1.

Table 1 Test Examples Each permanent liquid phase additive of Examples 1 to 5, 1st liquid (1 dose 8
0mj2; p89.07) and second liquid (80m[)
The stopping effect of the first liquid was tested using the test conditions shown in Table 2 and the test method below. For comparison, tests were also conducted without using any of the additives for bama liquid in Examples 1 to 6. The results are shown in Table 2.

First, 100 hairs with a length of 15 cm are approximately 1.0 cm in diameter.
It was wrapped around the 0 rod and fixed. Next, after immersing it in the first liquid for 12 minutes, it was further immersed in the second liquid for the time shown in Table 2.
Immersed in liquid. Thereafter, the hair was washed with water, removed from the lot, and air-dried, and the waving efficiency of the hair was measured. The method for measuring wave efficiency is as follows.

As is clear from Table 2, the waving efficiency of the hair of Examples 1 to 5 was very good. Moreover, in the case of Examples 3 to 5, the rinsing effect was also confirmed. On the other hand, the hair waving efficiency of the comparative example was poor even after 15 minutes.
It was significantly inferior to the cases of Examples 1 to 5.

[Effects of the Invention] The additive for perm liquid of the present invention can be added to the second liquid in the usage amount n1j, thereby forming the first liquid in a shorter time than conventionally.
The liquid stopping effect can be more complete, and the amount of potassium bromate, etc., which is an active ingredient in the second liquid, can be reduced.

Claims (2)

[Claims] (1) An additive for a perm solution containing an organic acid, a carbonate, and a binder. (2) The additive for a perm solution according to claim 1, further comprising a cationic surfactant and hydrolyzed collagen.