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A kind of environment-friendly permanent sticky natural rubber and preparation method thereof

A natural rubber and environment-friendly technology, applied in the field of environment-friendly constant-viscosity natural rubber and its preparation, can solve the problems that rubber Mooney viscosity stability is difficult to achieve a better effect, safety and environmental protection are difficult to be guaranteed, etc. Environmental pollution, low cost, the effect of avoiding corrosion and damage

Active Publication Date: 2020-10-30
华君橡胶科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of hydroxylamine and mercaptan constant viscosity agents in the above patents, it is difficult to guarantee the safety and environmental protection of the processing end, and it is difficult to achieve a good effect of the rubber Mooney viscosity stability.

Method used

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  • A kind of environment-friendly permanent sticky natural rubber and preparation method thereof
  • A kind of environment-friendly permanent sticky natural rubber and preparation method thereof
  • A kind of environment-friendly permanent sticky natural rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preferred embodiment of an environment-friendly constant-viscosity natural rubber provided by the present invention, the Mooney viscosity of the rubber is between 35>75, the initial value of plasticity>30, the plasticity retention rate>60, the tensile strength>18Mpa, Elongation at break>700%; rubber materials include water-based environmental protection constant viscosity agent, water-based environmental protection constant viscosity agent is a water-based hydrazine mixture, and its pH value is between 7 and 8.5; the active ingredients of rubber except water are below 150 °C No decomposition, no volatilization; the raw material of rubber can be natural rubber fresh latex, rubber garden gel or miscellaneous rubber.

Embodiment 2

[0044] Such as figure 1 A preferred embodiment of the preparation method of a kind of environment-friendly permanent sticky natural rubber provided by the present invention is shown, comprising the steps:

[0045] 1.1 Processed by glue line process;

[0046] 1.2 Glue purification: the glue raw material is fully filtered through a purifier to remove impurities, and the solid content of the purified glue is adjusted to >25%;

[0047] 1.3 Prepare the constant viscosity agent solution: mix the environmental protection constant viscosity agent and pure water evenly to make a constant viscosity agent solution, and control the pH value of the constant viscosity agent solution to <8.0;

[0048] 1.4 Add the constant viscosity agent solution into the glue and mix, stir evenly, and the stirring time after mixing is >20min;

[0049] 1.5 Coagulate the glue mixed with the constant viscosity agent solution, and the coagulant is formic acid;

[0050] 1.6 The immersion and flotation washing...

Embodiment 3

[0065] Such as figure 2 A preferred embodiment of the preparation method of a kind of environment-friendly permanent sticky natural rubber provided by the present invention is shown, comprising the steps:

[0066] 2.1 Raw materials enter the factory;

[0067] 2.2 Sorting foreign matter;

[0068] 2.3 Waterline processing is adopted;

[0069] 2.4 Purification of wrinkled pieces: crushing, mixing and rinsing impurities of wrinkled piece raw materials;

[0070] 2.5 Crushing the purified wrinkle to make rubber granules;

[0071] 2.6 Prepare constant viscosity agent solution: calculate the amount of constant viscosity agent, mix the environmental protection constant viscosity agent and pure water evenly to make a constant viscosity agent solution, and control the pH value of the constant viscosity agent solution to <8.0;

[0072] 2.7 Spray constant viscosity agent: Spray the constant viscosity agent solution onto the rubber granules for mixing;

[0073] 2.8 Loading;

[0074] ...

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Abstract

The invention discloses environment-friendly constant-viscosity natural rubber, relating to the technical field of natural rubber processing. The rubber has a Mooney viscosity being between 35 and 75,is prepared from an aqueous environment-friendly constant viscosity agent, which is an aqueous hydrazine mixture. The invention also discloses a preparation method of the rubber, which is characterized by comprising the steps of preparing a constant viscosity agent solution and mixing with a glue line process, a preparation method of the rubber, which is characterized by comprising the steps of preparing a constant viscosity agent solution, spraying and drying with a water line process, and another preparation method of the rubber, which is characterized by comprising the steps of preparing aconstant viscosity agent solution and dry-mixing with a dry stirring line process. The environment-friendly constant-viscosity natural rubber is effectively free of the phenomenon that natural rubbergradually hardens during the storage process without changing the production process specification of primary processing of natural rubber, and has the advantages of safety, environmental protection,stability at high temperature and under mechanical action, and the like.

Description

technical field [0001] The invention relates to the technical field of natural rubber processing, in particular to an environment-friendly constant-viscosity natural rubber and a preparation method thereof. Background technique [0002] Due to the existence of active groups such as aldehyde groups on the molecular chain of natural rubber, cross-linking and bridging between molecular chains and molecular chains are prone to occur during storage, forming a macromolecular network structure, resulting in an increase in the Mooney viscosity of natural rubber. resulting in gelation. In application, since the viscosity of natural rubber increases during storage, in order to reduce the viscosity of rubber, it must be masticated repeatedly, prolonging the mixing time, consuming more power, and more seriously, resulting in product quality consistency Decline, reduce production efficiency, increase production costs, and reduce the economic benefits of enterprises. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08K5/24C08J3/205
CPCC08J3/205C08J2307/00C08K5/24C08L7/00
Inventor 周景润周其彬杨乐陈强
Owner 华君橡胶科技(上海)有限公司