Acrylic rubber composition and acrylic rubber crosslinked product

A rubber composition, acrylic technology, applied in the field of acrylic rubber composition to achieve the effect of maintaining tensile strength and tensile stress

Inactive Publication Date: 2007-05-30
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this composition can provide a cross-linked product with good heat aging resistance, according to the Environmental Pollution Substance Discharge Management Improvement Act enacted in March 2001 to prevent environmental pollution, the use of the above-mentioned nickel compound must be reported to the local government

Method used

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  • Acrylic rubber composition and acrylic rubber crosslinked product
  • Acrylic rubber composition and acrylic rubber crosslinked product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] Hereinafter, the present invention will be described more specifically using examples and comparative examples. Hereinafter, "parts" and "%" are based on weight unless otherwise specified. In addition, the test and evaluation of each characteristic are as follows.

[0080] (1) Mooney viscosity

[0081] Mooney viscosity (ML 1+4 , 100°C) measured in accordance with JIS K6300.

[0082] (2) Normal physical properties and thermal aging physical properties (tensile strength, elongation, 100% tensile stress and hardness)

[0083] At a temperature of 170°C, the acrylic rubber composition was shaped and cross-linked by pressing for 20 minutes to obtain a sheet with a length of 15cm, a width of 15cm, and a thickness of 2mm, and then placed in an oven at a temperature of 170°C for 4 hours for the second time For cross-linking, the secondary cross-linked sheet was punched out with a No. 3 dumbbell cutter to make a test piece, and the following measurement was performed with the...

manufacture example 1

[0089] Add 200 parts of water, 3 parts of sodium lauryl sulfate, 49 parts of ethyl acrylate, 49 parts of mono-n-butyl acrylate and 2 parts of mono-n-butyl fumarate into a polymerization reactor equipped with a thermometer and a stirring device. Gas and nitrogen replacement were carried out twice to fully remove oxygen, and then 0.005 parts of cumene hydroperoxide and 0.002 parts of sodium formaldehyde sulfoxylate were added, and emulsion polymerization was started at normal pressure and a temperature of 30°C until the polymerization conversion rate reached 95. %. The obtained emulsion polymerization solution was coagulated in an aqueous calcium chloride solution, washed with water, and dried to obtain acrylic rubber a. The composition of acrylic rubber a is: 49% of ethyl acrylate monomer unit, 49% of n-butyl acrylate monomer unit, 2% of mono-n-butyl fumarate monomer unit (carboxyl content is 1.25×10 -2 ephr), Mooney viscosity (ML 1+4 , 100°C) is 35.

Embodiment 1

[0091] 100 parts of acrylic rubber a, 60 parts of reinforcing agent carbon black (FEF Carbon, manufactured by Tokai Carbon Corporation), 2 parts of processing aid stearic acid, and antioxidant styrenated diphenylamine [Steara- LAS, produced by Seiko Chemical Co., a mixture of compounds of the above formula (1) and formula (2)] 0.5 parts were put into a Banbury mixer, kneaded at 50° C., and then transferred to an open roll mill, Add 1 part of crosslinking agent 2,2'-bis[4-(4-aminophenoxy)phenyl]propane and 2 parts of crosslinking accelerator 1,3-di-o-tolylguanidine, mix at 40°C kneading to prepare an acrylic rubber composition.

[0092] The obtained acrylic rubber compositions were subjected to normal-state physical properties and thermal aging physical properties (tensile strength, elongation, 100% tensile stress, and hardness) and compression set tests. The results are shown in Table 1.

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Abstract

It is to provide an acrylic rubber composition which provides an acrylic rubber vulcanizate retaining high tensile strength and modulus even if a long-termthermal load is applied and contains no component limited by environmental regulations. The above object is attained by an acrylic rubber composition comprising 100 parts by weight of a carboxyl group-containing acrylic rubber and 0.3 to 8 parts by weight of a styrenated diphenylamine compound, and by an acrylic rubber composition further comprising 0.05 to 20 parts by weight of a crosslinking agent besides the above components.

Description

technical field [0001] The present invention relates to an acrylic rubber composition which will be a material of an acrylic rubber cross-linked product excellent in heat resistance, and more particularly to providing an acrylic rubber cross-linked product which highly retains tensile strength and tensile stress even after thermal load. Combined acrylic rubber composition. Background technique [0002] Acrylic rubber is widely used in fields such as automobile-related fields because of its excellent heat resistance and oil resistance. Recently, however, there has been a strong demand for acrylic rubbers that are more excellent in heat resistance, especially in heat aging resistance, for sealing materials, hose materials, vibration-proof materials, pipe materials, strip materials, and rubber sheathing materials. [0003] In order to improve the heat aging resistance of rubber products, antioxidants are generally added. Using a combination of diphenylamine-based antioxidants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08K5/17
CPCC08K5/18C08L33/08C08K5/17C08L13/00
Inventor 大石刚史田岛忠
Owner ZEON CORP
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