JPS58108245A - Resin composition for sole of shoe and other footware - Google Patents

Abstract

PURPOSE:To prepare a composition preventing the static charge and the low- voltage electric shock of human body, by compounding a polyvinyl chloride resin with a polymer plasticizer, dibutyl phthalate, a quaternary ammonium salt or a cationic curface active agent, a nitrile rubber, etc. CONSTITUTION:100pts.wt. of a polyvinyl chloride resin is compounded with 50- 90pts.wt. of a polymer plasticizer (having a molecular weight of 1,000-8,000), 0-30pts.wt. of a nitrile rubber (having an acrylonitrile content of 20-45%), 30-60pts.wt. of dibutyl phthalate, 2-10pts.wt. of a quaternary ammonium salt or a cationic surface active agent, 1-5pts.wt. of a stabilizer and 0.2-2pts.wt. of a pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a resin composition for soles of footwear that can stop electric shocks and prevent electric shocks when coming into contact with low voltage.

In places where static electricity is generated, such as factories that manufacture molded products such as combs and synthetic polar resins, the human body wearing non-conductive footwear can easily become charged with static electricity. If a person approaches or comes into contact with a grounded object, the person's own electric charge will be discharged at once, resulting in a severe electric shock, which may cause accidents such as falling or falling, or the electric charge may be discharged. There is a risk that the sparks generated during this process may ignite nearby flammable materials. Furthermore, if there are people who are charged with electricity in a place where precision machinery or magnetic tapes are handled, there is a risk that the precision machinery will go awry or the magnetic tapes will be adversely affected.

Japanese Patent Publication No. 49-23818 is intended to solve this problem, and uses 60 to 100 parts by weight of diptylphthalate to 100 parts by weight of polyvinyl chloride +1 as a resin composition for shoe soles. 5-25 parts by weight of butylphthalyl butyl glycolate and 5-25 parts by weight of magnesium carbonate
60 parts by weight of either one or both;
A proposal to blend 50 to 1 liter parts by weight of 2-ethylhexyl-β-hydroquine ethyl phthalate and, if necessary, 5 to 25 parts by weight of butylphthalyl butyl glycolate and/or 5 to 50 parts by weight of magnesium carbonate. However, if there are organic solvents or oils on the floor of electrically conductive shoes, including conventional ones, the plasticizers mixed into the vinyl chloride will be removed by the organic solvents or oils. There is a problem in that the sole surface of the shoe hardens and becomes brittle and cracks during use, making it unsuitable for use in a short period of time.

The present invention has been further devised and developed in order to solve various problems with paper, and uses a polymeric polymer plasticizer and a synthetic rubber with good conductivity, thereby reducing extraction by organic solvents. In addition, by adding a quaternary ammonium salt or a cationic activator, the electrical conductivity can be improved and the electrical resistance can be reduced to 1 x 10 Ω to 1 x 1 in PJrk where organic solvent oils are used.
The aim is to manufacture shoes that fall within the 0Ω range.

Examples of the present invention will be described below. The present invention uses polyvinyl chloride walnut 100% as a resin composition for injection molding.
Polymerizable plasticizer (molecular weight 1ooo, 5 parts by weight)
90 parts by weight of nitrile rubber (acrylic nitrile content @ 20%, 45%), 30 to 60 parts by weight of dibutyl phthalate, 2 to 10 parts by weight of quaternary ammonium salt or cationic surfactant. , 1 to 5 parts by weight of a stabilizer, and 0.2 to 2 parts by weight of a pigment.

In the present invention, the molecular weight of the polymerizable plasticizer is set to about 1,000 to 8,000 because if it is less than 1,000, sufficient oil and solvent resistance effects cannot be obtained, and if it is more than 8,000, there will be problems in processability. On the other hand, 2) IJ rubber has excellent conductivity, but when the amount exceeds 31 parts by weight, processability deteriorates. On the other hand, dibutyl phthalate becomes too lubricated and its value as a product decreases.

Furthermore, if the amount of primary ammonium salt or cationic surfactant is less than 1 part by weight, the electrical conductivity effect will be significantly reduced, whereas if it is more than 11 parts by weight, problems such as oozing to the surface and making the product sticky will occur. There is.

Specific examples Polyvinyl chloride resin 100 parts by weight Polyester plasticizer 80 parts by weight Nitrile rubber 10 parts by weight Dibutyl phthalate 30 parts by weight Cationic surfactant 5 parts by weight 7, n-f3
a series 3 parts by weight pigment 0.
5 parts by weight of the resin composition for shoe soles having the above composition was injection molded to a thickness of 5 parts by weight.
ψ, the thickness of the lace part was 42 m/m. Suffumelias is used as the lining fabric, and the shoe size is 25 C.
It was 11 liters. When the electrical resistance value of these boots was measured using the method shown in the attached diagram, the electrical resistance value of the sole was '7
It was 10'Ω. In addition, in the drawing, the lid shoe body, 2 is a copper plate, 3 is a copper plate weighing 2 kg, and the number is a megger measuring device (50
0■).

However, the gasoline resistance is '70 x 70 x 2 m/
This is the weight gazing rate after immersing a sheet of m at 25° C. for 24 hours.

Oil resistance is the rate of weight change after a sheet of the same size is immersed in ASTM 1$3 oil for 70 cycles x 24 hours.

[Brief explanation of drawings]

The drawing shows the procedure for measuring the electrical resistance value of the sole of a shoe. 1... Boots 2... Copper plate

Claims (1)

[Claims] (1) 50 to 90 parts by weight of polymerizable plasticizer, 0 to 30 parts by weight of nitro rubber, per 100 parts by weight of polyvinyl chloride resin,
30 to 60 parts by weight of dibutyl phthalate, 2 to 10 parts by weight of quaternary ammonium salt or cationic surfactant, 1 part by weight of stabilizer
(2) A fat composition for soles of footwear, characterized in that it contains ~5 parts by weight and 0.2 to 2 parts by weight of a pigment.