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Rubber composition for shoe sole and rubber foam composition

A rubber composition and a technology for shoe soles, which are applied in the field of rubber compositions for shoe soles, can solve the problems of insufficient strength and wear resistance, and achieve the effects of excellent dimensional stability and excellent slip resistance

Inactive Publication Date: 2009-02-11
UBE IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength, wear resistance, etc. of these foamed materials are not enough to meet the needs, and further improvement is required.

Method used

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  • Rubber composition for shoe sole and rubber foam composition
  • Rubber composition for shoe sole and rubber foam composition
  • Rubber composition for shoe sole and rubber foam composition

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0211] Manufacturing example 1 (manufacturing example of the first aspect)

[0212] (Manufacture of vinyl cis-polybutadiene rubber (A-1))

[0213] 3.5 L of polymerization solution (1,3-butadiene: 30%, cyclohexane: 70%), 5.3 mmol of water, 10.5mmol diethyl aluminum chloride, 1.8mmol carbon disulfide, 32mmol cyclooctadiene and 0.03mmol cobalt octoate were stirred at 50°C for 30 minutes to carry out cis-1,4-polymerization to produce cis-polybutadiene (a -1).

[0214] 10% by mass (relative to the percentage of the obtained vinyl cis-polybutadiene rubber) of polyisoprene (IR) was added to the resulting polymerization solution (Mooney viscosity (ML1+4, 100°C): 87, cis 1,4-structure content rate: 98%), stirred at 50°C for 1 hour. After that, 560 ml of 1,3-butadiene, 4.5 mmol of water, 13.4 mmol of triethylaluminum chloride, and 0.07 mmol of cobalt octoate were added, and stirred at 50°C for 30 minutes to produce 1,2-polybutadiene crystal fibers (b-1). A methanol solution of 4,6-...

manufacture example 2

[0215] Manufacturing example 2 (manufacturing example of the second aspect)

[0216] (Manufacture of vinyl cis-polybutadiene rubber (A-2))

[0217] Except in Production Example 1, the polymerization solution was changed to (butadiene: 31%, 2-butenes: 29%, cyclohexane: 40%), and no unsaturated polymer compound (polyisoprene ) except that a vinyl cis-polybutadiene rubber (A-2) was obtained in the same manner as in Production Example 1. Its physical properties are shown in Table I-1.

manufacture example 3

[0218] Manufacturing example 3 (manufacturing example of the third aspect)

[0219] (Manufacture of vinyl cis-polybutadiene rubber (A-3))

[0220] (i) Production of vinyl cis-polybutadiene (A-4)

[0221] 1.0 L of polymerization solution (1,3-butadiene: 31%, 2-butenes: 29%, cyclohexane : 40%), add 1.7mmol water, 2.9mmol diethylaluminum chloride, 0.3mmol carbon disulfide, 6mmol cyclooctadiene and 0.008mmol cobalt octoate, stir at 40°C for 20 minutes, and carry out cis-1,4-polymerization , to produce 1,4-cis-polybutadiene (a-3). At this time, a small amount of cis-polybutadiene polymerization liquid was taken out from the reaction tank, and after drying, the viscosity of the obtained toluene solution of cis-polybutadiene rubber was measured to be 175 cp.

[0222] Add 150ml of 1,3-butadiene, 1.1mmol of water, 3.5mmol of triethylaluminum chloride, and 0.02mmol of cobalt octoate to the resulting polymerization solution, and stir at 40°C for 20 minutes to perform 1,2-polymerizatio...

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Abstract

A rubber composition for shoe soles characterized by being obtained by compounding 100 parts by mass of a polymer ingredient which comprises 10-90 mass% vinyl / cis-polybutadiene rubber (A) comprising 1,4-cis-polybutadiene (a) and 1,2-polybutadiene crystal fibers (b) which have an average fiber length of 200 nm or shorter, an average aspect ratio of 10 or lower, and a melting point of 170 DEG C or higher and in which the number of the crystal fibers having a fiber length of 200 nm or shorter is 90 or more per 25 [mu]m<2>, 10-50 mass% diene rubber (B) other than the rubber (A), and 2-50 mass% thermoplastic polymer (C) with 2-50 parts by mass of a rubber reinforcement (D). This rubber composition for shoe soles is lightweight, has a moderate hardness, is excellent in tensile strength, tear strength, wearing resistance, and gripping properties, and has excellent dimensional stability after foaming. It is suitable for use as the outer soles of shoes.

Description

technical field [0001] The present invention relates to a rubber composition for shoe soles which is light in weight and suitable in hardness and excellent in tensile strength, tear strength, abrasion resistance, and gripping property, and a shoe sole excellent in dimensional stability after foaming A rubber foam composition is used. Background technique [0002] Rubber compositions for shoe soles are required to have the strength to support the weight of the wearer, to withstand the load and impact force generated by exercise, and to improve the wearing comfort and safety of shoes, and to reduce the weight and slip resistance, so various scheme (for example, refer to Patent Documents 1 to 6). [0003] Patent Document 1 discloses a reinforced rubber composition in which 1,2-polybutadiene, polyisoprene rubber, and the like are mixed with styrene butadiene rubber and an inorganic reinforcing agent. However, if the amount of the inorganic reinforcing agent is increased, the e...

Claims

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Application Information

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IPC IPC(8): C08L9/00A43B13/04C08J9/04C08K3/04C08K3/36C08L101/00
Inventor 和田隆中村幸雄冈本尚美
Owner UBE IND LTD
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