Method for producing rubber molded article
A technology of rubber molding and manufacturing methods, which is applied in the field of manufacturing rubber moldings and can solve problems such as no research
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[0129] Hereinafter, an Example and a comparative example are given and this invention is demonstrated concretely. Hereinafter, unless otherwise specified, "parts" are based on weight. In addition, the test and evaluation were performed as follows.
[0130]
[0131] Regarding the composition of each monomer unit contained in the acrylic rubber, by 1 It was confirmed by H-NMR measurement that the content of carboxyl groups in the acrylic rubber was calculated by dissolving the acrylic rubber in acetone and performing potentiometric titration with a potassium hydroxide solution.
[0132]
[0133] The Mooney viscosity (ML1+4, 100°C) of acrylic rubber at a measurement temperature of 100°C was measured in accordance with the Mooney viscosity test of the physical test method for uncrosslinked rubber in JIS K6300.
[0134]
[0135] The surface states of the rubber molded body and the rubber cross-linked product were visually observed and evaluated according to the following cr...
manufacture example 1
[0144] (Manufacture of acrylic rubber)
[0145] 200 parts of water, 2 parts of sodium lauryl sulfate, 64 parts of ethyl acrylate and 34.6 parts of n-butyl acrylate were added to a polymerization reactor with a thermometer and stirring device, and degassing and degassing under reduced pressure were carried out for three times. After nitrogen replacement to fully remove oxygen, 1.4 parts of mono-n-butyl fumarate and 0.006 parts of p-terpine hydroperoxide were added, and emulsion polymerization was started at normal pressure and temperature of 20°C, and the reaction was carried out for 5 hours. The polymerization conversion rate reached about 90%. Then, the obtained emulsion polymerization liquid was coagulated with a calcium chloride solution, washed with water, and dried to obtain an acrylic rubber. The polymer composition of the obtained acrylic rubber was 64.0% by weight of ethyl acrylate units, 34.6% by weight of n-butyl acrylate units, and 1.4% by weight of mono-n-butyl fu...
Embodiment 1
[0147] (Preparation of Acrylic Rubber Composition)
[0148] To 100 parts of the acrylic rubber obtained in Production Example 1, 65 parts of HAF carbon black (trade name "Seast3", manufactured by Tokai Carbon Co., Ltd., DBP oil absorption value: 101 cc / 100 g), 5 Part of plasticizer (trade name "ADKCIZER RS735", manufactured by ADEKA Corporation), 2 parts of stearic acid, 1 part of ester wax (product name "Greg G-8205", manufactured by Dainippon Ink Chemical Co., Ltd., lubricant), 2 parts of 4,4'-bis(α,α-dimethylbenzyl)diphenylamine (trade name "NocracCD", manufactured by Ouchi Shinshin Chemical Industry Co., Ltd., antioxidant) and 1 part of primary Alkylamine (trade name "lipomin 18D", manufactured by Lion Specialty Chemicals Co., Ltd.) was mixed at 50°C for 5 minutes. Next, the resulting mixture was transferred to a roll mixer at 50°C. 0.5 parts of hexamethylene diamine carbamate (trade name "Diak #1", manufactured by DuPont Dow Elastomers, aliphatic polyamine compound) as ...
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Abstract
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