JPS6011991B2 - Liquid adhesive for socks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid stocking adhesive suitable for adhering socks directly to the skin.

Various types of adhesives are commercially available, but in general, the adhesive strength is too strong to be used for sock closures, making it difficult for the socks to peel off the skin, damaging the skin, and causing the adhesive to dry out. This has the disadvantage of making the skin sticky and stiff, so in recent years adhesives specifically designed for sock closures have been provided.

However, most of the adhesives are water-resistant, which are mainly composed of aqueous solutions of gum arabic, polyacrylic acid, sodium salts of polyacrylic acid, and alkanolamine salts, and provide appropriate adhesive strength for socks. All of them have a high viscosity and have the disadvantage of producing a slimy or sticky feeling when applied to the skin, resulting in poor usability. Further, this type of adhesive is often used in a roll-on type container for convenience of use, which has the disadvantage that the adhesive itself becomes fixed between the inner stopper and the ball when not in use. Therefore,
In order to solve the above-mentioned conventional drawbacks and provide an adhesive for stockings with excellent usability and handling characteristics, the present inventor has conducted various studies and found that acrylic acid and methacrylic acid ester or acrylic acid An aqueous alcohol solution containing an alkanol amiso-neutralized product of an acrylic copolymer of ester and methacrylic acid has a viscosity of 20 to 100 ps at 290, and an adhesive strength of 100 to 500 ps/s.
The present invention was completed based on this discovery. That is, the present invention contains polyvinylpyrrolidone, an alkanolamine neutralized product of an acrylic copolymer consisting of acrylic acid and methacrylic acid ester or acrylic ester and methacrylic acid, alcohol and water as essential components, and has a viscosity (at 25°C). The object of the present invention is to provide a liquid adhesive for hosiery fixing, which is formulated to have a specific ps of 20 to 100 ps and an adhesive force of 100 to 500 ta'. The average molecular weight of polyvinylpyrrolidone used in the present invention is generally in the range of 10,000 to 100,
In particular, a K value of 1 to 50 is suitable, preferably a K value of 30.
~90, and preferably has an average molecular weight of 40,000 to 36. Polyvinylpyrrolidone has a viscosity of 5 to 1 at 25 qo, either as a single grade or as a combination of each grade.
It is preferable to use it in the form of an aqueous solution adjusted to have a specific ps of 0.00 ps, preferably 10 to 30 ps. Generally speaking, those with a low K value have a low viscosity, so the amount to be blended will be large, and those with a high K value will have a high viscosity, so the amount to be blended will be small. Appropriate or preferred amounts of each grade are as follows. In Table 1, % indicates weight %.

The alkanolamine neutralized acrylic copolymer used in the present invention is a copolymer of acrylic acid and methacrylic acid ester or acrylic ester and methacrylic acid neutralized with an alkanolamine liquid, and generally has a molecular weight of 10,000 to It has a viscosity of 5000 ps.

In particular, Plus Size L5 (acrylic resin alkanolamine liquid manufactured by Gooh Kagaku Kogyo Co., Ltd.) having a viscosity of 15,000 to 2,000 ps neutralized with 2-amino-2-methyl-1-probanol is suitable for use in the present invention. When these alkanolamine neutralized products are used in combination with polyvinylpyrrolidone, they greatly improve the adhesive strength of polyvinylpyrrolidone and act as a plasticizer for polyvinylpyrrolidone, exhibiting the effect of softening the adhesive film. Therefore, the blending amount should be adjusted especially taking into account the physical properties and blending amount of polyvinylpyrrolidone, and the blending ratio of the alkanolamine neutralized product of the acrylic copolymer to polyvinylpyrrolidone is 9:1 to 2. :8, especially in the range of 8:2 to 5:5. Of course, the total amount of both is 2 to 4 of the total.
The blending amount is adjusted so that the cloud amount% is preferably in the range of 5 to 3% by weight. The alcohol used in the present invention is preferably a C, to C5 aliphatic primary lower alcohol, with ethanol being particularly preferred.

This alcohol component imparts antiseptic and antifungal effects to the adhesive composition, speeds up the drying of the adhesive composition, improves the initial adhesive strength, and gives a refreshing feeling to the human body when drying. The amount is adjusted depending on the relationship with other ingredients, but if the amount is too low, the antiseptic and antifungal effects will be poor, while if it is too high, it will irritate the skin and pose a safety problem. Approximately 5-3% by weight is suitable. In addition to the above-mentioned essential components, polyethylene glycol is preferably blended as a wetting agent and plasticizer, since this further imparts flexibility to the final adhesive layer and alleviates the feeling of stiffness during use.

The average molecular weight of the polyethylene glycol used is suitably 200 to 500 in a liquid state, and particularly preferably 300 to 400. If the amount is too large, the adhesive force will be reduced, so the appropriate range is 1 to 20% by weight, preferably 5 to 12% by weight. In addition, to increase the commercial value of adhesives,
Flavors, pigments, etc. can be added as necessary.

According to the invention, the viscosity at 25°C is 20-100 ratio p
s, and adhesive strength of 100 to 500 mm/ground, preferably 2
Viscosity at 5°C 40-50 ps and adhesive strength 15
Since it can obtain 0 to 400 days per day, it does not feel slimy or sticky when applied to the skin, and it can also provide suitable adhesive strength as a sock clasp, giving it an excellent feel when used as a liquid adhesive for hosiery clasps. You can get what you want.

In the present invention, at least polyvinylpyrrolidone,
The alkanolamine neutralized product of the acrylic copolymer, alcohol and water, preferably further using polyethylene glycol, has a viscosity of 20 to 100 ps at
, and it is important to obtain an adhesion strength of 100 to 500 mm/base, and various blending ratio compositions are adopted depending on the physical properties of each component, especially polyvinylpyrrolidone and the alkanolamine neutralized product of the acrylic copolymer. be able to.

Hereinafter, the present invention will be explained in more detail using preferred embodiments thereof.

Examples 1-6 Parts by weight Polyvinylpyrrolidone (K-90) 9-2 Plus size L53P I-8 Polyethylene glycol 400 10 Ethanol 10 Water
An adhesive composition consisting of No. 70 was prepared according to a conventional method, and its viscosity, adhesive strength, and feeling in use were examined.

The results are shown in Table 2 below. Comparative Examples 1, 2, and 3 The viscosity, adhesive strength, and feeling of use were investigated in the same manner as in the example except that 1 part by weight of either polyvinylpyrrolidone or plus size L5 was included, and the results were compared with the examples. It is shown in Table 2 below.

Comparative Example 4 The viscosity, adhesive strength, and feeling of use of commercially available products were investigated.
Table 2 shows the results of comparison with Examples.

2nd surface adhesive strength measurement: Cotton knitted fabric and urethane leather were used as the test fabrics. Cut each piece into 1 to 4 mm in width and 4 in length, and apply 3 to 5 g of adhesive to the urethane leather so that the adhesive area was 1. After uniformly coating the female and overlaying the cotton knitted fabric over it, applying a constant load for a certain period of time and leaving it for 1 hour at 36oORH75%, its tensile shear strength was measured using a tension meter.

Viscosity measurement: Measure using a Brookfield viscometer (B-type viscometer) according to a conventional method.

Usability: Based on panel test.

○: Good, ×: Bad *1: There was a feeling of sliminess and stickiness when applied to the skin, and pain was felt when taking off the socks.

*2: I felt pain when taking off my socks.

*3: There is no slimy or sticky feeling when applied to the skin, and there is no pain when taking off socks.

*4: There is no viscosity and the feel is good, but the adhesive strength is weak.

*5: I didn't feel any pain when I took off my socks, but when I applied it to my skin, it felt slimy and sticky, and the ball in the roll-on type container stopped spinning.

Claims (1)

[Scope of Claims] 1. Polyvinylpyrrolidone, an alkanolamine neutralized product of acrylic acid and methacrylic acid ester or an acrylic copolymer of acrylic acid ester and methacrylic acid, containing alcohol and water as essential components; The total amount of acrylic copolymer blended is 2 to 40
Weight%, blending ratio of polyvinylpyrrolidone and alkanolamine neutralized product of the acrylic copolymer is 9:1 to 2:8
The alcohol content is in the range of 5 to 30% by weight, and 2
A liquid adhesive for hosiery fastening, characterized by having a viscosity of 20 to 1000 cps at 5°C and an adhesive strength of 100 to 500 g/cm^2. 2 Polyvinylpyrrolidone, alkanolamine neutralized product of acrylic acid and methacrylic acid ester or acrylic copolymer of acrylic acid ester and methacrylic acid, containing alcohol, polyethylene glycol and water as essential components, and containing polyvinylpyrrolidone and the acrylic copolymer. The total blending amount of the polymer is 2 to 40% by weight, the blending ratio of polyvinylpyrrolidone and the alkanolamine neutralized product of the acrylic copolymer is in the range of 9:1 to 2:8, and the alcohol content is 5%.
~30% by weight, polyethylene glycol content 1-20
Viscosity at 25° C. 20-1000 cps in weight %,
A liquid adhesive for securing socks, characterized in that the adhesive strength is 100 to 500 g/cm^2.