JPS5946213A - Composition for molding protective film preventing roughness of hand - Google Patents

Abstract

PURPOSE:The titled composition having specific viscosity and pH value, containing a dilute aqueous solution of water-soluble resin as a dispersion medium, dimethylpolysiloxane having an emulsion size as a dispersed phase, and, optionally a wetting agent, superfatted agent, etc. CONSTITUTION:The titled composition containing 0.5-6wt% dimethylpolysiloxane shown by the formula in the form of emulsion particles, 0.01-1wt% water- soluble resin (preferably carboxyl group-containing vinyl polymer), and, optionally 0.1-5wt% wetting agent and 0.1-6wt% superfatted agent, having 100- 1,500cp viscosity (at 25 deg.C) and 5.5-8.0pH. This composition forms a water repellent protective film only by applying it to human hands thinly, the film has no feeling of physical disorder, no skin irritation, etc., has dry feeling without hindering cutaneous respiration, the protective film neither causes release nor damage even by water immersion or friction, and does not lose its properties for about several hours in cooking, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition for forming a protective film to prevent rough hands.More specifically, the present invention relates to a composition for forming a protective film to prevent rough hands. The present invention relates to a composition capable of forming a protective film for preventing rough hands that can withstand continuous handwork.

There are various reasons why housewives get rough hands, but the most important one is preparing meals and cleaning up after washing dishes. That is, even though housewives' housework work has been mechanized to a large extent, these tasks are still left to manual labor, and housewives' hands come into contact with cold water, hot water, or even detergent for a considerable period of time. The cause is thought to be degreasing of the skin surface. Such rough hands are likely to occur not only during cooking, but also during manual labor such as cleaning, sewing, and professional manual labor, especially in the winter.

The present invention allows housewives to easily apply a thin layer to their hands before handicrafts such as meal preparation, without causing any discomfort or skin irritation. The object of the present invention is to provide a composition capable of forming a smooth-feeling anti-drying film that can sufficiently withstand continuous manual work such as cleaning up after washing dishes and the like.

That is, the present invention has a viscosity (at 25° C.) of 100 to 6% by weight of dimethylpolysiloxane in the form of emulsion particles as a non-volatile content and 0.01 to 1% by weight of a water-soluble resin as a solid content. The present invention relates to a composition for forming a protective film to prevent rough hands, characterized by comprising an aqueous composition having a centipoise of 1500 centipoise and a pH of 5.5 to 8.0.

In the compositions of the present invention, a dilute aqueous solution of a water-soluble resin dissolved in an aqueous medium is present in the form of a continuous dispersion medium, while the dimethylpolysiloxane is present as an emulsion-sized dispersoid. Therefore, by simply applying a thin layer of this composition to a person's hands, there is no discomfort or skin irritation, and the water-repellent property is different from that of conventional creams, without causing any discomfort or skin irritation. A protective covering is formed.

This protective coating is virtually resistant to peeling or damage even when subjected to immersion in water or abrasion, and its performance is not lost during several hours of continuous manual labor such as meal preparation and cleanup. do not have. Thus, by using the composition of the present invention, it is possible to easily prevent rough hands without causing skin disorders or the like.

In the composition of the present invention, emulsion-sized dimethylpolysiloxane is used to impart water repellency, protective action, slipperiness, etc. to the skin of the hands, while the water-soluble resin is emulsion-sized dimethylpolysiloxane that imparts water repellency, protective action, slipperiness, etc. to the skin of the hands. It is recognized that it has the effect of fixing to the surface. Since this dimethylpolysiloxane still exists in emulsion size on the skin surface, it is recognized that it does not interfere with skin breathing or perspiration.

Dimethylpolysiloxane is an oily substance that has a chemical structure represented by the following formula and whose viscosity increases as the value of n increases. Generally, its viscosity is 5
An appropriate material can be selected from those in the range of 1500 centistokes to 1500 centiStokes (25° C.).

As the water-soluble resin, any water-soluble resin having a hydrophilic group such as a carboxylic acid group, a sulfonic acid group, a hydroxyl group, or an ether group can be used.

Among these, carboxyl group-containing vinyl polymers are preferred from the standpoint of forming a protective film that is less irritating to the skin, does not feel sticky or slimy, and is durable. Suitable examples include, but are not limited to, maleic anhydride-vinyl ether copolymers, carboxyl group-containing acrylic copolymers, carboxyl group- and hydroxyl group-containing acrylic copolymers, and the like.

In the present invention, dimethylpolysiloxane in the form of emulsion particles is used in an amount of 0.5 to 6% by weight as a non-volatile content.
In particular, it is used in amounts of 1 to 4% by weight.

That is, when the amount of dimethylpolysiloxane is less than the above range, a satisfactory effect of protecting against rough hands cannot be obtained,
On the other hand, if the amount exceeds the above range, a sticky or strange feeling will occur.

On the other hand, the water-soluble resin is preferably used in an amount of 0.01 to 1% by weight, particularly 0.05 to 0.5% by weight as a solid content, and if the amount of the water-soluble resin is less than the above range, a protective film will be formed. The resistance tends to be unsatisfactory, and if the amount exceeds the above range, it tends to give a strange feeling when applied.

The composition of the present invention has a viscosity (25°C
) is preferably in the range of 100 to 1500 centipoise, especially 200 to 1000 centipoise, while in order to avoid skin irritation the composition has a pH of 5.5 to 8.0, especially 6.0 to 1000 centipoise. It is desirable to have a pH of 7.5.

This composition is a dimethylorganopolysiloxane O/
It is produced by dispersing a W-type (oil-in-water) emulsion and an aqueous solution of a water-soluble resin in water to a desired concentration, and adjusting the pH of the dispersion as necessary.

Of course, this composition also contains ingredients other than the above-mentioned essential ingredients, such as a trace amount of fragrance, a trace amount of pigment, a pH adjuster, a trace amount of a fungicide, and 0.1 to 5% by weight of a humectant (glycerin,
propylene glycol), 0.1 to 6% by weight of superfatting agents (lanolin, squalene, octyldodecanol, isopropyl myristate), etc. can be added as desired.

The composition for forming a protective film on rough hands of the present invention generally has 0.0% on the hands.
Apply in an amount of 5 to 3 cc and rub evenly over the palms and fingers of the hands to prevent rough hands.

The invention is illustrated by the following example.

Example 1. 20 parts by weight of an O/W type emulsion with a concentration of 60% by weight of dimethylpolysiloxane, 50 parts by weight of a 2% aqueous solution of maleic acid-vinyl ether copolymer, 1 part by weight of triethanolamine, 10 parts by weight of a 10% propylene glycol solution of a fungicide. 1000 parts by weight of an aqueous composition (viscosity 250 centipoise, pH 7.5) was prepared by mixing 5 parts by weight squalene and the remaining amount of water.

When I took 1 cc of this aqueous composition and rubbed it evenly onto the palms and fingers of my hands, a smooth, water-repellent protective film was formed.

This protective film did not have any sticky or foreign appearance, and did not lose its water-repellent protective effect even after working with water for 2 hours.

After washing, the protective film was easily removed by rubbing the hands with soap.

In addition, in the preparation of the above-mentioned aqueous composition, 10 parts by weight of carboxy-methylcellulose was used instead of the maleic acid-vinyl ether copolymer (10 times the amount was necessary for thickening).
When I used it, my hands felt slimy and strange.

Example 2. 60 parts by weight of an O/W emulsion with a concentration of 60% by weight dimethylpolysilokine, 125 parts by weight of a 2% aqueous solution of a water-soluble carboxyl group-containing acrylic copolymer, 2.2 parts by weight of triethanolamine, 10 parts by weight of an antifungal agent. %, 10 parts by weight of 1,3-butylene glycol solution, 30 parts by weight of octyldodecanol and the remaining amount of water to make 1000 parts by weight of an aqueous dispersion (viscosity 1000 centipoise (25°C), p
H6.7) was prepared.

From this composition, a protective film for preventing rough hands was formed which had better durability and resistance than that of Example 1.

Patent applicant Duskin Franchise Co., Ltd. Agent
Benmeito Ikuo Suzuki

Claims (3)

[Claims] (1) Viscosity (25%
°C) is 100 to 1500 centipoise and pH is 5.
1. A composition for forming a protective film to prevent rough hands, characterized by comprising an aqueous composition having a molecular weight of 5 to 8.0. (2) The composition according to claim 1, wherein the water-soluble resin is a carboxyl group-containing vinyl polymer. (3) The composition according to claim 1, further comprising 0.1 to 5% by weight of a wetting agent and 0.1 to 6% by weight of a superfatting agent.