A kind of preparation method of eucommia gum mixed rubber for normal temperature molding processing

A technology of forming processing and eucommia gum, applied in the field of preparing mixed rubber with eucommia gum, 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, etc., so as to improve processing safety. , Processability and physical properties improvement, energy saving effect

Active Publication Date: 2019-05-03
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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  • A kind of preparation method of eucommia gum mixed rubber for normal temperature molding processing
  • A kind of preparation method of eucommia gum mixed rubber for normal temperature molding processing
  • A kind of preparation method of eucommia gum mixed rubber for normal temperature molding 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 eucommia gum mixed rubber for normal temperature molding processing, and relates to a rubber molding processing method. Put the rubber into an internal mixer, screw extruder or open mill for mastication, then mix the parked natural rubber with 20-60 parts of carbon black, 30-80 parts of white carbon black, plasticizer 2 ‑10 parts, made of raw rubber masterbatch, parked for 2‑24 hours; put Eucommia gum into a banbury mixer, screw extruder or open mixer for mastication and add other compounding agents to make Eucommia gum compound rubber; put Unparked eucommia mixed rubber and raw rubber masterbatch are added to the internal mixer or open mixer (operated at a low temperature of 25°C-35°C) at the same time, mixed evenly, and then released into tablets. The invention effectively reduces the hardness of Eucommia gum and its mixed rubber, increases the plasticity of Eucommia gum mixed rubber, ensures the plasticity of normal mixed rubber, facilitates a series of operations such as calendering, extrusion and molding under normal conditions, and has the advantages of Good practical application value.

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 Patents(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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