Anti-Flutter Adhesive Composition for Wide-Range Temperature Curing
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Solution Overview
Problem
Existing anti-flutter adhesives require high energy inputs for curing due to a narrow temperature range, which is not energy-efficient and limits their application across different automotive production lines.
Innovation Solution
An anti-flutter adhesive composition comprising ethylenically unsaturated rubber, PVC homopolymer and copolymer with specific K values, epoxy resin, epoxy curing agent, and organic peroxides with varying decomposition temperatures, allowing curing across a wide temperature range from 150 to 200°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-flutter adhesive is cured at high temperature (170-200°C), then proper curing is achieved, but energy consumption increases
Solution Approach 1:
The patent changes the chemical parameters of the adhesive system by incorporating dual peroxide initiators with different decomposition temperatures (first peroxide: 125-180°C, second peroxide: <125°C) and controlling their amounts (first peroxide: 0.4-0.8%, second peroxide: 0.2-1%). This parameter change enables the adhesive to cure across a wide temperature range (150-200°C) with excellent shear strength, allowing lower temperature curing (150-170°C) that reduces energy consumption while maintaining curing quality
Solution Approach 2:
The patent creates a composite curing system by combining two types of peroxide initiators with different thermal characteristics. The first organic peroxide (decomposition temperature 125-180°C) and second organic peroxide (decomposition temperature <125°C) work synergistically to provide broad curing temperature adaptability, enabling the adhesive to achieve proper curing at lower temperatures (saving energy) while also accommodating higher temperature processes
2Reliability
If anti-flutter adhesive is cured at narrow temperature range, then proper curing is achieved, but adaptability to different production lines is limited
Solution Approach 1:
The patent modifies the chemical composition parameters by including both first organic peroxide (0.4-0.8%, decomposition temperature 125-180°C) and second organic peroxide (0.2-1%, decomposition temperature <125°C). This parameter adjustment expands the curing temperature window to 150-200°C, allowing the same adhesive to be used across different automotive production lines with varying temperature capabilities
Solution Approach 2:
The adhesive composition achieves multi-functionality by incorporating dual peroxide initiators that provide broad temperature range curing capability. The combination of first and second organic peroxides enables the single adhesive product to function reliably across different production line temperature ranges (150-200°C), making it universally applicable to various automotive manufacturing processes
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 excellent shear strength and good appearance on various substrates while reducing energy consumption by enabling curing at lower temperatures, suitable for diverse automotive production processes.
Implementation Method 1
at least one first organic peroxide having a decomposition temperature from 125 to 180 °C
Implementation Method 2
at least one second organic peroxide having a decomposition temperature less than 125 °C
Implementation Method 3
at least one epoxy resin; e) at least one epoxy curing agent
Data Source
AI summary
This invention relates to an anti-flutter adhesive composition, comprising a) at least one ethylenically unsaturated polymer; b) at least one PVC homopolymer having a K value from 67 to 75; c) at least one PVC copolymer having a K value from 60 to 75; d) at least one epoxy resin; e) at least one epoxy curing agent; f) at least one first organic peroxide having a decomposition temperature from 125 to 180 °C; and g) at least one second organic peroxide having a decomposition temperature less than 125 °C. The anti-flutter adhesive composition can be cured across a wide temperature and have excellent shear strength and good appearance after cured.