JPS59196341A - Rubber composition - Google Patents

Abstract

PURPOSE:A rubber composition having good lubricity and suited as a material for rubber articles involving sliding, prepared by mixing natural or synthetic rubber with a composition prepared by suspending a solid lubricant in natural or synthetic rubber. CONSTITUTION:A rubber composition prepared by mixing 100pts.wt. natural or synthetic rubber with 5-200pts.wt. solid lubricant composition, wherein said solid lubricant composition is one prepared by suspending a solid lubricant in natural or synthetic rubber. Examples of the synthetic rubbers used include acrylic rubber, nitrile rubber, fluoroelastomer and silicone rubber. Examples of the solid lubricants used include graphite, molybdenum disulfide, talc, and mica. Said solid lubricant composition contains 10-200pts.wt. solid lubricant and 100pts.wt. natural or synthetic rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber composition, and more particularly relates to a rubber composition with good lubricity including a solid lubricant composition.

The present invention provides a rubber composition suitable as a raw material for rubber products that involve sliding, such as oil seals and backings.

Good lubricity D1 is required for binding rubber compositions for rubber products that involve sliding, such as oil seals and backings.

For this reason, it has heretofore been attempted to impart lubricity to the rubber material by mixing solid lubricants such as graphite, molybdenum disulfide, talc, or mineral into natural rubber or synthetic rubber.

However, in the case of 14 people applying the solid lubricant directly to the rubber, there was a problem with both hands.

■ Mixing a large amount of solid dη lubricant into rubber is a problem because solid lubricants cause slippage between rubber layers.

■ Even if a large amount of solid lubricant was mixed in, the flow of the rubber would be poor during molding, causing molding defects.

Therefore, it was considered to wrap the solid lubricant in microcapsules and mix them into the rubber, but in this case too, many of the microcapsules were destroyed by the shear force in J5 during kneading with rolls, intermixers, etc., and the solid lubricant A problem similar to 1r11 arises when directly mixing into rubber.

In order to solve the problems of the prior art described above, the present invention has the following features:
Solid; 1) A solid lubricant composition is prepared in advance using natural rubber or synthetic rubber as a binder, and 5 to 200 parts by weight of this solid lubricant composition is blended with 100 parts by weight of natural rubber or synthetic rubber. There is.

Synthetic rubber, 10 is Hornocryl rubber, 21-Ril rubber,
Synthetic rubber of silicone rubber and bamboo is used.

Solid 14 (lubricants include Furanoai 1~, moly disulfide)
/Din, tarri,? Squid etc. are used.

The solid lubricant composition contains 10 to 200 parts of solid lubricant to 100 parts of natural rubber or synthetic rubber.

The rubber composition according to the present invention is made of natural rubber or synthetic rubber]j
＼Kaheinter Dandatta 14, i+VI lubricant composition・
? Since it is blended with natural rubber or rubber, it is easy to mix a large amount of solid lubricant into the comb, and the comb has good compatibility with the p-1 body lubricant composition. Therefore, molding defects are less likely to occur.

Next, the present invention will be explained with reference to examples.

Reference Example 1 A solid lubricant composition contained -1 to 100 parts by weight of lyl rubber, 110 parts by weight of graphite, 5 parts by weight of zinc oxide, 1 part by weight of stearic acid, 1 part by weight of sulfur, and tetramethylthiuramdisarno? The mixture was obtained by mixing 1 part by weight of hydride and then heating and pressurizing the mixture. The graphite held by this nitrile rubber was crushed into powder using a crusher.

In the examples: - To 100 parts by weight of Zirru rubber, all of 100 parts of the powdered solid lubricating composition of Reference Example 1'C, 5 parts of zinc oxide
A rubber composition was obtained by mixing Φω part, 1 part by weight of stearic acid, 1 part by weight of sulfur, and 1 part by weight of tetramedyldiuram schizarnophide'.

This rubber composition was molded using an oil seal mold for 15 minutes.
Pressure molding was carried out at 0'C for 30 minutes.

The oil seal that has been shaped has a low sliding resistance and is moisturized. Near 1. 't-ka IJga (Atsu I:.

’t”f 7’) Out 11i 1 person

Claims (1)

[Claims] 1. A comb composition comprising 5 to 200 parts by weight of a solid d lubricant composition mixed with 100 parts by weight of natural rubber or synthetic rubber, wherein the solid lubricant composition is a J. medo lubricant composition. A rubber composition characterized in that it is a composition protected by natural rubber or synthetic rubber.