Acrylic Rubber Composition High Temperature Vibration Insulation
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Solution Overview
Problem
Conventional rubber materials, including acrylic rubber, experience a decrease in tan δ values at high temperatures, impairing their vibration insulation properties, which is a challenge for applications in high-temperature environments like automobile engines.
Innovation Solution
An acrylic rubber composition comprising 20 to 80 parts by weight of a functional group-containing styrene acrylic-based resin with hydroxyl or epoxy groups, combined with 0.1 to 5 parts by weight of sulfur or a sulfur-containing vulcanization accelerator, is used to enhance vibration insulation properties at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber materials are used in high temperature environments, then they can provide basic vibration insulation, but their tan δ value decreases at high temperature causing impaired vibration insulation effects
Solution Approach 1:
The patent uses a composite material system combining acrylic rubber with specific additives (polyester plasticizer at 5-30 parts by weight and metal deoxidizer at 0.1-5 parts by weight) to create a composition that maintains high tan δ values at elevated temperatures, resolving the contradiction between temperature resistance and vibration insulation performance
Solution Approach 2:
The patent modifies the chemical composition parameters of the rubber material by incorporating specific ratios of polyester plasticizer and metal deoxidizer, which changes the material's thermal and mechanical properties to maintain vibration insulation effectiveness at high temperatures
2Temperature
If acrylic rubber is used as molding material for vibration insulation members, then it can be used in high temperature environments, but the same tendency of tan δ decrease at high temperature is observed
Solution Approach 1:
The patent introduces metal deoxidizer as an intermediary substance that interacts with the acrylic rubber matrix and polyester plasticizer to stabilize the tan δ value at high temperatures, preventing the degradation that occurs in conventional formulations
Solution Approach 2:
By adjusting the compositional parameters to include 0.1-5 parts by weight of metal deoxidizer alongside polyester plasticizer, the patent transforms the material's thermal response characteristics to maintain reliable vibration insulation properties in high temperature environments
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 effectively maintains excellent tan δ values and vibration insulation properties at high temperatures, making it suitable for use in vibration insulation members such as mounts and grommets in high-temperature environments.
Implementation Method 1
an acrylic rubber composition which is excellent in scorching stability during processing and contains a crosslinking agent nonselectively crosslinkable regardless of the type of crosslinking points
Implementation Method 2
0.1 to 5 parts by weight of sulfur or a sulfur-containing vulcanization accelerator
Implementation Method 3
a vibration insulation member having an excellent tan δ value at a high temperature and improved vibration insulation properties
Data Source
AI summary
An acrylic rubber composition comprising 5 to 80 parts by weight, preferably 10 to 60 parts by weight, more preferably 20 to 40 parts by weight, of a styrene acrylic-based resin containing a functional group other than a carboxyl group, based on 100 parts by weight of acrylic rubber. A vibration insulation member having an excellent tan δ value at a high temperature and improved vibration insulation properties can be molded by adding a specific ratio of a styrene acrylic-based resin to acrylic rubber. This acrylic rubber composition can be effectively used as a molding material for a mount, a grommet, or the like in the vicinity of an automobile engine used in a high temperature environment.