Rubber composition for coating metal cord, steel cord/rubber composite, tire, and chemical product
A technology of rubber composition and metal cord, applied in special tires, tire parts, natural rubber coatings, etc., can solve the problem of not being able to obtain crack resistance, and achieve crack resistance and low heat generation, excellent The effect of crack resistance
Active Publication Date: 2021-08-20
BRIDGESTONE CORP
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0005] However, although when using a rubber composition having a reduced carbon black content as described in Patent Document 1 or a rubber composition containing carbon black having an optimized particle size as the above-mentioned coating rubber, it is possible to improve in terms of low loss performance Some improvement, but not enough crack resistance
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1～9 and comparative example 1～7
[0115] The rubber composition of each sample was prepared according to the chemical composition listed in Table 1 using the ingredients listed in Table 1 or Table 2.
[0116] Next, brass-plated (Cu: 63% by mass, Zn: 37% by mass) steel cords (1 mm × 5 mm × 0.25 mm (wire diameter)) were arranged in parallel at intervals of 12.5 mm and coated with the prepared rubber composition. cover. Next, the steel cord was vulcanized at 145° C. for 30 minutes to prepare a steel cord-rubber composite sample.
[0117] The details of each ingredient in Table 1 and Table 2 are as follows. The details of carbon black are listed in Table 1. It should be noted that the content of each component is the content (parts by mass) relative to 100 parts by mass of the rubber component.
[0118] - Method for producing silica 1
[0119] First, the concentration of 12L is 10g / L (SiO 2 / Na 2(2) A sodium silicate solution with a weight ratio of 3.5) was introduced into a 25L stainless steel reactor. The...
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Abstract
The purpose of the present invention is to provide a rubber composition for coating metal cords, the rubber composition making it possible to achieve high levels of both cracking resistance and low-heat-buildup performance. In order to solve the above problem, the present invention is characterized in including: a rubber component; carbon black in which the cetyltrimethylammonium bromide (CTAB) adsorption specific surface area is 110-160 m2 / g, the half width [delta]D50 of a peak including the Stokes equivalent diameter Dst that is the most frequent in an aggregate distribution obtained by centrifugal sedimentation is 60 nm or lower, and the ratio ([delta]D50 / Dst) of the [delta]D50 and the Dst is 0.95 or less; silica in which the CTAB adsorption specific surface area is 200 m2 / g or higher; and a vulcanizing agent.
Description
technical field [0001] The invention relates to a rubber composition for covering metal cords, a steel cord-rubber compound, tires and chemical products. Background technique [0002] A tire requiring strength generally includes a carcass formed of cords embedded in the radial direction of an annular tire carcass inside the tire, and a belt layer arranged outside the carcass layer in the tire radial direction. The belt or carcass may be composed of a steel cord-rubber complex in which the steel cord is covered with a coating rubber to impart load resistance, traction resistance, etc. to the tire. In addition, the coating rubber of the steel cord is required to have high durability, especially high crack resistance. [0003] In addition, in recent years, from the viewpoint of improving the fuel efficiency of automobiles, there has been an increasing demand for improving the low heat generation properties of the above-mentioned coating rubbers to reduce the rolling resistance...
Claims
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IPC IPC(8): D07B1/06B60C9/04C08L21/00C08K3/04C08K3/36
CPCC08K3/36C08K3/04B60C1/0041B60C2001/0066B60C9/0007B60C2009/0021C08K2201/003C08K2201/006Y02T10/86C08L7/00C09D107/00C08K5/098C08K5/09C08K5/18C08K3/22C08K5/47C08K3/06B60C9/04C08L9/00
Inventor小山内圭太
OwnerBRIDGESTONE CORP