Heat-Resistant Rubber Composition Using Attapulgite and Bismaleimide
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Solution Overview
Problem
Conventional heat-resistant rubber compositions are not adequately stable and strong, and often use expensive materials, failing to provide sufficient high-temperature resistance for applications in high-temperature environments.
Innovation Solution
A high-strength heat-resistant rubber composition comprising 80-85 parts of a rubber base material, 5-11 parts of attapulgite, 40-50 parts of linear low-density polyethylene, 4-6 parts of ceramic powder, 2-6 parts of a cross-linking agent, 5-9 parts of filler, 5-9 parts of cross-linking aid, 8-13 parts of rosin, and 7-12 parts of bismaleimide, with yttrium oxide, along with a specific process of primary and secondary kneading and forming steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat-resistant rubber compositions are used, then heat resistance is provided, but strength and stability are insufficient
Solution Approach 1:
The invention uses a composite material system combining fluorine-based rubber (heat resistance) with natural rubber (strength), along with multiple fillers (attapulgite, silica, carbon black) and specific vulcanizing agents. This composite approach allows the final product to simultaneously achieve heat resistance up to 200°C or higher while maintaining high tensile strength and stability, resolving the contradiction between heat resistance and strength.
2Temperature
If expensive material components are used to improve heat resistance, then heat resistance is enhanced, but cost increases
Solution Approach 1:
The invention optimizes the compositional parameters by specifying precise ranges for each component (e.g., fluorine-based rubber 30-80 parts, natural rubber 20-50 parts, attapulgite 5-20 parts, silica 10-30 parts). By carefully controlling these parameters and using a multi-component system rather than relying on single expensive materials, the composition achieves high heat resistance while balancing cost effectiveness through optimized material quantities and combinations.
3Temperature
If rubber products are used in high temperature environments, then high temperature resistance is required, but conventional rubber products soften and lose stability
Solution Approach 1:
The invention incorporates preliminary stabilizing actions through the selection of heat-resistant base materials (fluorine-based rubber) and pre-addition of heat stabilizers (attapulgite, silica, antioxidants) before vulcanization. The cross-linking structure is also designed in advance through dual vulcanization systems (sulfur and peroxide) that create a stable three-dimensional network resistant to thermal degradation, preventing softening and maintaining compositional stability at high temperatures.
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 composition achieves high strength, stability, and heat resistance up to 300°C, with improved cost-effectiveness and performance compared to prior art, as demonstrated by the examples provided.
Implementation Method 1
containing a natural rubber (NR) and an ethylene-propylene-diene copolymer (EPDM) as rubber components, an organic peroxide as a vulcanizing agent, and a lower alkylphenol disulfide as a co-crosslinking agent
Implementation Method 2
5 to 9 parts by mass of a filler
Data Source
AI summary
According to the invention, a high strength heat resistant rubber composition having both excellent strength and heat resistance, comprising: 80 to 85 parts by mass of a rubber base material; 5 to 11 parts by mass of attapulgite; 40 to 50 parts by mass of a linear low-density polyethylene; 4 to 6 parts by mass of a ceramic powder; 2 to 6 parts by mass of a cross-linking agent; 5 to 9 parts by mass of a filler; 5 to 9 parts by mass of a cross-linking aid; 8 to 13 parts by mass of rosin; 12 to 16 parts by mass of bismaleimide; and 7 to 12 parts by mass of yttrium oxide and a process for producing a high strength heat resistant rubber product using the composition are provided.