Bimetallic Rubber Accelerator via Sol-Gel Microwave Synthesis
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Solution Overview
Problem
Existing bimetallic rubber accelerators face challenges such as difficulty in controlling the metal ratio, poor dispersion, and stability, leading to suboptimal properties in rubber products, including vulcanization time, tensile strength, and elasticity.
Innovation Solution
A bimetallic synergistic rubber accelerator is prepared using a sol-gel method followed by microwave synthesis, which involves dissolving cobalt and manganese salts with polyethylene glycol, adjusting pH, and reacting at specific temperatures to produce a pre-precursor powder that is then mixed with sulfur and processed in a microwave environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional rubber accelerators (CBS, TBBS) are used, then the vulcanization system is simple and easy to manufacture, but the accelerating effect is limited and cannot meet high-performance requirements
Solution Approach 1:
The patent uses composite materials by combining cobalt and manganese metals to form a bimetallic accelerator system. This composite approach creates synergistic effects where the combination of two metals produces superior accelerating performance compared to traditional single-metal accelerators, directly addressing the limited accelerating effect of conventional rubbers
2Productivity
If existing bimetallic accelerators are used, then the accelerating effect is improved, but the metal ratio is difficult to control and dispersion is poor
Solution Approach 1:
The patent applies preliminary action by pre-mixing cobalt and manganese salts with sulfur powder before the actual vulcanization process. This pre-preparation ensures that the metal salts are uniformly distributed and properly combined with sulfur, making the metal ratio easier to control and improving dispersion throughout the rubber matrix
Solution Approach 2:
The patent uses sulfur powder as an intermediary substance that facilitates the combination of cobalt and manganese salts. The sulfur acts as a mediator that helps distribute the metal salts uniformly and enables better control of the metal ratio during the preparation process
3Productivity
If existing bimetallic accelerators are used, then some accelerating performance is achieved, but stability is poor leading to inconsistent rubber product properties
Solution Approach 1:
The patent applies preliminary action by pre-mixing cobalt and manganese salts with sulfur powder before the actual vulcanization process. This pre-preparation ensures that the metal salts are uniformly distributed and properly combined with sulfur, making the metal ratio easier to control and improving dispersion throughout the rubber matrix
Solution Approach 2:
The patent uses specific parameter changes by controlling the molar ratio of cobalt to manganese salts within 1:2 to 1:5 and maintaining sulfur content at 70-90 wt%. These controlled parameter changes ensure consistent accelerator performance and stability, leading to reproducible rubber product properties
4Productivity
If bimetallic accelerators with poor dispersion are used, then the accelerating effect is reduced, but the overall rubber product properties including tensile strength, elongation, and hardness are poor
Solution Approach 1:
The patent applies preliminary action by pre-mixing cobalt and manganese salts with sulfur powder before the actual vulcanization process. This pre-preparation ensures that the metal salts are uniformly distributed and properly combined with sulfur, making the metal ratio easier to control and improving dispersion throughout the rubber matrix
Solution Approach 2:
The patent uses specific parameter changes by controlling the molar ratio of cobalt to manganese salts within 1:2 to 1:5 and maintaining sulfur content at 70-90 wt%. These controlled parameter changes ensure consistent accelerator performance and stability, leading to reproducible rubber product properties
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces a bimetallic synergistic rubber accelerator with improved reactivity and uniform particle size, resulting in rubber products with enhanced tensile strength, wear resistance, and reduced vulcanization time.
Implementation Method 1
Step S1, preparing a pre-precursor powder by a sol-gel method
Implementation Method 2
reacting the initial reaction solution at 50-70° C., then drying to obtain a xerogel
Implementation Method 3
performing microwave synthesis; mixing the pre-precursor powder and a sulfur powder evenly, then reacting in a microwave environment
Data Source
AI summary
The present application relates to rubber accelerators, and specifically disclosed are a bimetallic synergistic rubber accelerator, a preparation method thereof, and a rubber product. The preparation method of the accelerator includes the following steps: Step S1, preparing a pre-precursor powder by a sol-gel method; Step S2, performing microwave synthesis; the Step S1 specifically includes the following steps: Step S11: dissolving a cobalt salt and a manganese salt in water, adding polyethylene glycol and then stirring evenly, and adjusting the pH to 7.5-8 with an alkali solution to obtain an initial reaction solution; Step S12: reacting the initial reaction solution at 50-70° C., then drying to obtain a xerogel, and then pulverizing and screening to obtain the pre-precursor powder. The accelerator of the present application can be used to prepare rubber products. The accelerator has the advantages of shortening the vulcanization time and improving the overall performance of the rubber products.