JPH0361799B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a flooring material with improved slip resistance. In general, rubber flooring is often installed on the floors of vehicles, buildings, etc. from the viewpoints of protecting the floor, improving the appearance, improving heat retention, feeling of walking, and reducing walking noise. One of the most important properties is slip resistance, and this slip resistance can be said to be one of the most important properties for flooring materials in terms of pedestrian safety. Conventionally, the above-mentioned flooring materials have been made of natural rubber or synthetic rubber with fillers such as calcium carbonate, clay, etc.
There are those that are rolled with added pigments, and those that have rubber-like elasticity made of vinyl chloride, but all of them have a smooth surface and have low slip resistance, especially when the floor is wet. There is a problem that it becomes easy to slip. Incidentally, it is common practice to improve slip resistance by adding unevenness to the surface of the flooring material, but unevenness can make it uncomfortable to walk on, and dust can accumulate in the recesses, damaging the appearance. This problem occurs and is not very desirable. In view of this, the present invention has been developed to improve the additives of flooring materials mainly composed of rubber-like substances so that the flooring materials exhibit excellent slip resistance both when dry and when wet. The purpose is to ensure walking safety. The flooring material according to the present invention contains an isobutylene-based polymer,
That is, it is characterized in that polyisobutylene or a copolymer containing isobutylene as a main component is added in an amount of 1 to 30 parts by weight of isobutylene. Crosslinkable rubbers include NR (natural rubber),
SBR (styrene/butadiene rubber), BR (butadiene rubber), NBR (nitrile/butadiene rubber),
CR (chloroprene rubber), EPR (ethylene propylene rubber), and other materials in which three-dimensional network chains are formed by crosslinking agents such as sulfur, metal oxides, peroxides, and resins are applicable. As the thermoplastic rubbery polymer, what is generally called a thermoplastic elastomer is used, such as SBS type teleblock made of styrene (S) and butadiene (B), multiblock copolymer, high styrene rubber, and 1,2-polybutadiene. Ru. As the isobutylene polymer, polyisobutylene or a copolymer containing isobutylene as a main component, such as butyl rubber, which is a copolymer of isobutylene and isoprene, is used. The amount of isobutylene in the isobutylene polymer is set at 1 to 30 parts by weight per 100 parts by weight of the rubber-like material, because if it is less than 1 part by weight, the slip resistance cannot be sufficiently improved. If the amount exceeds 30 parts by weight, the amount of residual dents will increase, the scratch resistance and abrasion resistance will decrease, and the surface will become easily stained, leading to problems with properties other than slip resistance. This is because this is not desirable. The desired amount of isobutylene is 3 to 10 parts by weight based on 100 parts by weight of the rubbery material. Of course, the flooring material according to the present invention may contain other additives, such as reinforcing agents, fillers, softeners, vulcanizing agents, vulcanization accelerators, and vulcanization accelerators, in addition to the above-mentioned isobutylene polymer. They can be selected and added as appropriate. Examples of the present invention will be described below. Examples 1-5 The common formulations for this example are shown in Table 1.

【table】

[Table] In the above table, the high styrene rubber is HSR0061 manufactured by Japan Synthetic Rubber Co., Ltd. Examples 1 to 5 were based on the formulations shown in Table 1, and Vistanecx MML-80, a polyisobutylene manufactured by Exxon Chemical Co., was used as the isobutylene polymer.
It is a mixture of each with different amounts added,
For each of these Examples and Comparative Example 1 without the addition of isobutylene polymer, slip resistance (slip resistance),
Tests for hardness and tensile strength were conducted. The test results are shown in Table 2.

[Table] In preparing the test materials, the isobutylene polymer (Vistanex MML-80) was put into an internal mixer at the same time as the rubbery substance and kneaded with other additives. It was made into a 3.0 mm thick sheet and pressurized and heated using a press. For vulcanization, the temperature was 160℃, and the temperature was 90% of the rheometer curve.
Pressing was performed for vulcanization time + 5 minutes]. The slip resistance coefficient D was measured using a JISA1407 pendulum slip resistance tester, the hardness was measured according to ASTM (American Society for Testing and Materials) standards, and the tensile strength was measured using a JISA1407 pendulum type slip resistance tester.
Each was measured based on JISK6301. From Table 2 above, it can be seen that the addition of the isobutylene polymer greatly contributes to increasing the slip resistance coefficient, that is, improving the slip resistance. Furthermore, addition of such an isobutylene polymer does not cause a large decrease in hardness and tensile strength.
This isobutylene-based polymer is recognized to have the effect of absorbing and alleviating the impact energy that the floor material receives from the sole of the footwear, and suppressing the slip phenomenon caused by the repulsion energy. Examples 6 and 7 In these examples, butyl rubber (Butyl 365 manufactured by Nihon Gosei Rubber Co., Ltd.) was used as the isobutylene polymer, and the common formulations were the same as in Table 1. Table 3 shows the results of measuring the slip resistance coefficients for Examples 6 and 7 in which the amount of butyl rubber added was changed.

[Table] Table 3 shows that butyl rubber also has a great effect on improving slip resistance. Examples 8 to 11, Comparative Examples 2 to 5 In this example, slip resistance was tested using a rubber-like material different from that of the previous example. is in Table 4,
The slip resistance test results are shown in Table 5.

【table】

[Table] In Table 4 above, NBR N230S, BR01,
Both RB820 and HSR0061 are manufactured by Japan Synthetic Rubber Co., Ltd.

[Table] Tables 4 and 5 show that the slip resistance can be improved by adding an isobutylene polymer regardless of which rubbery material is used, and that, as in Examples 8 and 10, slip resistance can be improved by adding an isobutylene polymer. It can be seen that relatively good slip resistance can be obtained in combination with high styrene rubber, or in combination with natural rubber, high styrene rubber and butadiene rubber. As described above, according to the present invention, since an appropriate amount of isobutylene polymer is added to the rubber-like substance, the floor material absorbs and alleviates the impact energy received from the sole of the footwear by the isobutylene polymer. The excellent effect of suppressing the slip phenomenon caused by repulsion energy and improving the slip resistance can be obtained.

Claims (1)

[Claims] 1. Polyisobutylene or a copolymer mainly composed of isobutylene is 1 to 30 parts by weight of isobutylene per 100 parts by weight of crosslinkable rubber, thermoplastic rubbery polymer, or a mixture of the above-mentioned rubber and rubbery polymer. A flooring material characterized by the addition of additives.