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Application of alanine in vulcanization and aging prevention of rubber

A technology of rubber vulcanization and alanine, which is applied in the field of rubber production, can solve the problems of performance degradation and great influence on rubber performance, and achieve the effect of improving anti-aging performance and accelerating vulcanization rate.

Inactive Publication Date: 2013-01-02
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] During the coagulation of natural fresh latex, the curing of clot, creasing, granulation, etc., most of the non-rubber components in the latex are discharged with the whey, and only a small part remains in the dry rubber, but this small part is non-rubber The composition has a great influence on the properties of rubber, and if the non-rubber components in natural rubber are removed, its performance will be greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The production method of rubber products, in 1 kg of natural rubber, together with fillers (such as carbon black or white carbon black), stearic acid, zinc oxide, vulcanization accelerator, anti-aging agent, sulfur and other compounding agents, in the mixing process Add 0.2 gram of alanine to it, knead evenly and vulcanize to make rubber products.

[0033] Operation steps: The natural rubber is masticated in an open mill at a temperature of 45°C-55°C, and the material is discharged when the Mooney viscosity reaches 60 [ML (1+4) 100°C]. The plasticized rubber is kneaded on the kneader, and vulcanization accelerator and alanine, anti-aging agent, zinc oxide, stearic acid, various fillers are added in sequence, and sulfur is added after a period of kneading. These compounding ingredients are mixed uniformly and discharged, during which the roller temperature of the kneader is controlled at 45°C-55°C. The kneaded rubber is then calendered, extruded, shaped, and vulcanized ...

Embodiment 2

[0035]The production method of rubber products, in 1 kg of synthetic rubber, together with fillers (such as carbon black or white carbon black), stearic acid, zinc oxide, vulcanization accelerator, anti-aging agent, sulfur and other compounding agents, in the mixing process Add 0.5 gram of alanine to it, knead evenly and vulcanize to make rubber products.

[0036] There are many kinds of synthetic rubber, and the operating conditions of each synthetic rubber are different. The following is an example of the operation steps of polyisoprene rubber.

[0037] Operation steps: When the Mooney viscosity of polyisoprene rubber is lower than 60 [M (1+4) 100°C], no mastication is required, and the polyisoprene rubber that needs to be masticated is first heated at a roller temperature of 50°C- Thin pass 1-2 times on the open mill with a small roller distance at 60°C. After the film is covered with rollers, slightly increase the roller distance and continue to masticate for about 2 minut...

Embodiment 3

[0039] The production method of rubber products, in the mixed rubber composed of 1 kg of natural rubber and 1 kg of synthetic rubber, together with other compounding agents, add 2 grams of alanine during the mixing process, and vulcanize after mixing evenly. rubber products.

[0040] In the mixed rubber composed of natural rubber and synthetic rubber, most of the synthetic rubber has good compatibility with natural rubber, and the combination effect is very good. There are many kinds of synthetic rubber, and the operating conditions of the mixed rubber composed of each synthetic rubber and natural rubber are not the same. The following is an example of the operation steps of the mixed rubber composed of polyisoprene rubber and natural rubber.

[0041] Operation steps: First put the two kinds of rubber into plastication and park them respectively, then make the plasticization rubber of natural rubber roll on the mixer, add 15% polyisoprene rubber in the plastication rubber and ...

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PUM

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Abstract

The invention discloses an application of alanine in vulcanization and aging prevention of rubber. A first use method of alanine comprises the step of adding alanine in the primary machining process of rubber, wherein the addition amount of alanine is 0.01-1% of the total weight of rubber; and a second use method of alanine comprises the step of adding alanine in the process of producing rubber products, wherein the addition amount of alanine is 0.01-1% of the total weight of rubber. According to the application, the vulcanization rate and the aging coefficient of the rubber can be increased, and the performance of the rubber can be improved.

Description

technical field [0001] The invention relates to the application of alanine, in particular to the new application of alanine as a rubber vulcanization accelerator and anti-aging agent, and belongs to the technical field of rubber production. Background technique [0002] Rubber is divided into natural rubber and synthetic rubber. The natural rubber of the present invention is obtained from the fresh latex produced by Hevea brasiliensis through coagulation, aging, crumpling, granulation and drying. [0003] The fresh latex produced by the Brazilian Hevea tree is generally called natural fresh latex. The composition of natural fresh rubber latex is very complex. In addition to rubber hydrocarbons, it also contains dozens of other substances, that is, non-rubber substances. These substances account for about 5% of the latex weight. Although these non-rubber substances account for a small amount of latex, they have varying degrees of influence on the properties of latex and rub...

Claims

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Application Information

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IPC IPC(8): C08K5/17C08L21/00C08L7/00
Inventor 张北龙邓维用黄红海丁丽
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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