JPH10279747A - Non-slipping elastomer composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition capable of surely stopping slippage of the molding material by fusing to polyolefin molding material which is liable to readily slip by adding a mineral oil and polypropylene to a styrene-based block copolymer elastomer. SOLUTION: This elastomer composition comprises (A) 100 pts.wt. styrene- based block copolymer elastomer, (B) 5-150 pts.wt. mineral oil (e.g. paraffin based oil) and (C) 10-200 pts.wt. polypropylene. Furthermore, e.g. a styrene- butadiene block copolymer, etc., is used as the styrene-based block copolymer and an inorganic filler such as calcium carbonate, natural fiber such as cotton, a fiber filler, flame retardant, etc., is preferably used as other component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastomer composition mainly used for preventing a molded product of a polyolefin synthetic resin from slipping.

[0002]

BACKGROUND OF THE INVENTION Polyolefin-based synthetic resins are inexpensive, have high chemical resistance, and have sufficient mechanical strength, and have been used as materials for various molded products. However, the polyolefin-based synthetic resin has a small surface friction coefficient, and when used as a material for, for example, a pallet or a tank, it becomes unstable when an object is placed on the material or when it is installed on the ground. Therefore, a material having a large coefficient of friction is adhered to the front or back surface of these molded products as a non-slip member.

[0003]

2. Description of the Related Art Conventionally, synthetic rubbers such as styrene-butadiene rubber and acrylonitrile-butadiene rubber, and elastomers such as styrene-butadiene block copolymer and styrene-isobutylene block copolymer have been used as the anti-slip member. Was.

[0004]

The above-mentioned synthetic rubber or elastomer has poor adhesion to polyolefin. Therefore, when the synthetic rubber or elastomer is adhered to the surface of a polyolefin molded article as a non-slip member, the non-slip member becomes a surface of the molded article. Easily peeled off, and there was a problem in durability.

[0005]

According to the present invention, 100 parts by weight of a styrenic block copolymer elastomer, 5 to 15 mineral oils are used to solve the above-mentioned conventional problems.
A non-slip elastomer composition comprising 0 parts by weight and 10 to 200 parts by weight of polypropylene.

[Elastomer] The elastomer used in the present invention is a styrene block copolymer. Examples of the styrene block copolymer include styrene-butadiene block copolymer (SBS) and styrene-isoprene block copolymer. Polymer (SIS), SBS hydrogenated styrene-ethylene-butylene block copolymer (SEBS), SIS hydrogenated styrene
Ethylene-propylene block copolymer (SEPS),
Alternatively, there is a mixture of two or more of these. The styrenic block copolymer has relatively good adhesion to polyolefin and good weather resistance.

[Mineral Oil] In order to adjust the hardness of the elastomer composition of the present invention, a mineral oil is added as a softener. The mineral oil is, for example, a paraffinic oil, a naphthenic oil, or a mixed oil of both. The mineral oil, when used as a softener in the elastomer composition of the present invention, has the advantage that it does not reduce the adhesion of the elastomer composition to polyolefins. The mineral oil is used in an amount of 5 to 150 parts by weight based on 100 parts by weight of the styrenic block copolymer. If the amount of the mineral oil is less than 5 parts by weight, the hardness of the elastomer composition of the present invention is too high to sufficiently increase the coefficient of friction. The hardness of the elastomer composition is too low, and the molded product is easily deformed by external force.

[Polypropylene] The polypropylene used in the present invention improves the adhesion of the composition of the present invention to a polyolefin-based synthetic resin. The polypropylene may be a homopolymer or a random copolymer or a block copolymer of ethylene, butadiene, styrene, vinyl acetate, acrylate, or the like in a small amount, for example, 20% by weight or less. You may. The polypropylene is used in an amount of 10 to 200 parts by weight based on 100 parts by weight of the styrenic block copolymer. If the amount of the polypropylene is less than 10 parts by weight, the adhesiveness of the elastomer composition of the present invention to the polyolefin-based synthetic resin becomes insufficient, and if it exceeds 200 parts by weight, the hardness of the elastomer composition of the present invention becomes too high. The anti-slip effect is not sufficient.

[Other additives] In the elastomer composition of the present invention, other than the above components, for example, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, water Aluminum oxide, magnesium oxide, titanium oxide, iron oxide, zinc oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, glass fiber, calcium silicate, benite, white carbon, carbon black, Inorganic fillers such as iron powder, aluminum powder, stone powder, blast furnace slag, fly ash, cement, zirconia powder, cotton,
Natural fibers such as hemp and wool, polyamide fibers, polyester fibers, acrylic fibers, viscose fibers, acetate fibers, vinyl chloride fibers, organic synthetic fibers such as vinylidene chloride fibers, asbestos fibers, glass fibers, carbon fibers, ceramic fibers, and metals Fillers such as fibers and inorganic fibers such as whiskers, and other additives such as flame retardants, antioxidants, ultraviolet absorbers, antistatic agents, and pigments may also be added.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

[Example 1] SBS (KX65S manufactured by Shell Japan) was used as a styrene-based block copolymer elastomer, naphthenic oil (Shellflex 371JY manufactured by Shell Japan) was used as a mineral oil, and a homopolymer (JPO) was used as polypropylene. J-Alomer MA-710), and elastomer compositions A-1, A-2, A-3, A-4, A- having the compositions shown in Table 1.
5, A-6 was prepared.

[Table 1] Each of the elastomer compositions was molded into a 15 mm wide strip-shaped sample by injection molding, and the hardness A, the anti-slip effect, and the fusion strength with polypropylene were measured. The fusion strength was determined by softening the sample adhesion surface and the polypropylene plate-like molded product adhesion surface with hot air while pressing them together, and measuring the fusion strength (kgf / 15 mm) by a 90 ° peel test. Table 2 shows the results of the performance test.

[Table 2] In Table 2, A-1 containing polypropylene in an amount of less than 10 parts by weight has a low fusion strength with respect to a polypropylene molded product.

Example 2 SEBS (Shell Japan G1) was used as a styrene-based block copolymer elastomer.
652) and a paraffinic oil (Dynaflex PW90 manufactured by Idemitsu Kosan) as a mineral oil,
As the polypropylene, block polypropylene (JP
O, J-Alomer MK-312), and elastomer compositions B-1, B-2, B-
3, B-4, B-5, B-6, B-7 were prepared.

[Table 3] A test piece was prepared from the above composition in the same manner as in Example 1, and the same performance test as in Example 1 was performed. The results are shown in Table 4.

[Table 4] In Table 4, B-1 containing polypropylene in an amount less than 10 parts by weight shows low fusion strength to a polypropylene molded product, and B-1 containing mineral oil in an amount exceeding 150 parts by weight. No. 7 is too hard and the anti-slip effect decreases.

Example 3 SBS (KX6 manufactured by Shell Japan) was used as a styrene-based block copolymer elastomer.
5S) and SEBS (G1652 manufactured by Shell Japan), and a naphthenic oil (Shellflex 371JY manufactured by Shell Japan) is used as a mineral oil, and a random polymer (J-Alomer FD-231 manufactured by JPO) is used as a polypropylene. And an elastomer composition C-1, C-2, C-3, C having the composition shown in Table 5.
-4, C-5 and C-6 were prepared.

[Table 5] A test piece was prepared from each elastomer composition in the same manner as in Example 1, and the same performance test as in Example 1 was performed. The results are shown in Table 6.

[Table 6] In Table 6, in the case of C-4 containing the polypropylene in an amount less than 10 parts by weight or the elastomer composition containing no filler, the polypropylene is close to 10 parts by weight.
In the case of C-1 in parts by weight, low fusion strength is exhibited with respect to the polypropylene molded product.

[0013]

According to the present invention, a polypropylene is added to give good polyolefin adhesion to the styrenic block copolymer elastomer, and the decrease in anti-slip properties caused by the addition of the polypropylene is covered with a mineral oil. It has good compatibility with styrene-based block copolymer elastomer, polypropylene and mineral oil, and a uniform composition can be obtained. And make sure it is slippery.

Claims (1)

[Claims] 1. A non-slip elastomer composition comprising 100 parts by weight of a styrenic block copolymer elastomer, 5 to 150 parts by weight of mineral oil, and 10 to 200 parts by weight of polypropylene.