Preparation method of gutta-percha combined rubber compound for normal-temperature forming and processing

A technology of forming and processing Eucommia gum, which is applied in the field of preparation of Eucommia gum combined with mixed rubber, can solve the problems of restricting the use of Eucommia rubber and its composite materials, complex extraction process of Eucommia gum, and large amount of raw materials, so as to improve processing safety , processing performance and physical performance improvement, energy saving effect

Active Publication Date: 2017-12-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the complex extraction process of eucommia gum, large amount of raw materials, low yield and other reasons, the use of eucommia rubber and its composite materials is limited.

Method used

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  • Preparation method of gutta-percha combined rubber compound for normal-temperature forming and processing
  • Preparation method of gutta-percha combined rubber compound for normal-temperature forming and processing
  • Preparation method of gutta-percha combined rubber compound for normal-temperature forming and processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] (1) Put the natural rubber into the open mill and masticate (at room temperature) for 10-20 minutes to cover the roll, park it for 3-5 hours, then add carbon black and plasticizer to the parked natural rubber to make natural rubber Raw rubber masterbatch.

[0026] (2) Put the Eucommia gum into the open mill for mastication (control the processing temperature at 50°C-70°C) for 10-15 minutes to cover the roll, then add 4 parts of zinc oxide, 2 parts of stearic acid, 2 parts of 4010NA, 1.2 parts of NOBS, 2.5 parts of sulfur, after the rubber materials are fully mixed and masticated, the eucommia compound rubber is made.

[0027] (3) Add Eucommia mixed rubber and natural raw rubber masterbatch to the open mill (at room temperature) at the same time, beat the triangular bag several times until it is evenly mixed, and stop the next piece.

[0028] (4) After the rubber compound is parked for 24 hours, it can be molded.

[0029] (5) Put the plasticized blend into the mold, he...

Embodiment

[0030] Implementation example: Utilize a preparation method of eucommia gum combined with glue for normal temperature molding processing. Carry out tests according to the following formula scheme, and obtain relevant implementation results.

[0031] Table 1: Embodiment 1 formulation (phr)

[0032]

[0033] Table 2: Physical properties of embodiment 1 sample

[0034]

[0035] Table 3: Vulcanization characteristics of the samples of Embodiment 1

[0036]

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Abstract

The invention discloses a preparation method of a gutta-percha combined rubber compound for normal-temperature forming and processing and relates to a rubber forming and processing method. Rubber is put in an internal mixer, a screw extruder or an open mill for plastifying, then stored natural rubber is mixed with 20-60 parts of carbon black, 30-80 parts of white carbon black and 2-10 parts of plasticizer in the equipment mentioned above, and rubber master batch is obtained and stored for 2-24 hours; gutta-percha is put in the internal mixer, the screw extruder or the open mill for plastifying, other accessory ingredients are added, gutta-percha rubber compound is obtained; and the gutta-percha rubber compound which is not stored and the rubber master batch are simultaneously added into the internal mixer or the open mill for uniform mixing (operation is performed at the low temperature between 25 DEG C and 35 DEG C), and then discharging is performed. By means of the preparation method of the gutta-percha combined rubber compound for normal-temperature forming and processing, the hardness of the gutta-percha and rubber compound combined with the gutta-percha is effectively lowered, the plasticity of the gutta-percha combined rubber compound is improved, the effect that the plasticity of a normal rubber compound is achieved is ensured, a series of operations such as rolling, extrusion and forming can be facilitated under the normal conditions, and the practical application value is good.

Description

technical field [0001] The invention relates to a preparation method of mixed rubber, in particular to a preparation method of eucommia gum mixed rubber used for normal temperature molding processing. Background technique [0002] Eucommia is a unique economic crop in my country. Its plants are rich in Eucommia rubber (trans-polyisoprene), which is an isomer of natural rubber. Eucommia gum is a crystalline material at room temperature and shows a hard The characteristics of quality plastics, its heat distortion temperature T m =60°C. Of particular importance is the three-stage nature of eucommia rubber during vulcanization and its thermoplastic properties when not cross-linked. When the degree of crosslinking is low, Eucommia rubber becomes a thermoelastomer with shape memory function. It becomes a rubber-type elastomer at a high degree of crosslinking. Therefore, the eucommia rubber with the required strength can be obtained by controlling the amount of vulcanizing agent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/00C08L7/00C08K13/02C08K3/22C08K5/09C08K3/06C08K5/18
CPCB29B7/002C08K3/06C08K3/22C08K5/09C08K5/18C08K13/02C08K2003/2296C08L7/00
Inventor 方庆红牟悦兴康海澜杨凤
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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