Vibration-Damping Urethane Composition for Heat and Load Resistance
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Solution Overview
Problem
Conventional vibration-damping materials are inadequate in load bearing, heat resistance, hydrolytic resistance, acid resistance, and mechanical stress resistance, and they undergo plastic deformation under heavy loads and high temperatures, making them unsuitable for applications like under marine engines.
Innovation Solution
A vibration-damping urethane resin composition comprising castor oil polyol, isocyanate, and specific inorganic particles with a phase change material, which provides excellent creep resistance and high loss factor, enabling effective vibration damping and resistance to compressive loads and impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional vibration-damping materials are used, then vibration-damping properties are provided, but load bearing capacity and heat resistance deteriorate
Solution Approach 1:
The patent employs a composite material system combining organic resin matrix with inorganic particles (microcapsules or porous bodies) containing phase change materials. This composite structure achieves synergistic effects where the organic resin provides flexibility and vibration-damping capability, while the inorganic particles contribute heat resistance, structural strength, and creep resistance, resolving the contradiction between vibration-damping and load-bearing performance
2Loss of energy
If conventional vibration-damping materials are used, then vibration-damping properties are provided, but resistance to heat and plastic deformation deteriorates
Solution Approach 1:
The patent utilizes phase change materials (such as paraffin, wax, fatty acids, or polyalkylene glycols) encapsulated within inorganic particles. These materials undergo phase transitions at specific temperatures, absorbing or releasing latent heat to regulate temperature fluctuations. This phase transition mechanism enables the composition to maintain dimensional stability and resist plastic deformation under thermal conditions while preserving vibration-damping properties
3Loss of energy
If microcapsules with organic resin outer shells are used, then vibration energy absorption is enhanced, but creep resistance deteriorates due to strong shell structure
Solution Approach 1:
The patent employs porous inorganic particles as alternatives to microcapsules with solid outer shells. These porous structures allow the phase change materials to be contained within a matrix that provides both vibration energy absorption capability and adequate creep resistance. The porous structure reduces the overall rigidity compared to solid-shell microcapsules, allowing controlled deformation while maintaining structural integrity under sustained loads
4Loss of energy
If vibration-damping material is applied, then vibration transmission is reduced, but mechanical stress resistance such as abrasion and impact deteriorates
Solution Approach 1:
The patent creates a composite material where the organic resin matrix provides toughness and flexibility for impact resistance, while the inorganic particles contribute hardness and structural stability for abrasion resistance. This composite architecture enables the material to withstand mechanical stresses while maintaining its vibration-damping functionality
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 forms a molded product with high vibration-damping properties, excellent creep resistance, and improved heat resistance, reducing the risk of plastic deformation under heavy loads and high temperatures, making it suitable for severe environments like under marine engines.
Implementation Method 1
inorganic particles (C) containing a phase change material
Implementation Method 2
a heat-storing low-resilience polyurethane foam containing particles capable of storing heat is described, wherein the particles are described as microcapsules including a latent heat storage agent in the shell
Implementation Method 3
a vibration-damping urethane resin composition comprising a castor oil polyol (A), an isocyanate (B) and inorganic particles (C) containing a phase change material
Implementation Method 4
a resin composition capable of readily forming a molded product having excellent creep resistance and having a large loss factor
Data Source
AI summary
The present invention relates to a vibration-damping urethane resin composition, a vibration-damping urethane resin molded product and a method for forming the molded product, and the vibration-damping urethane resin composition includes a castor oil polyol (A), an isocyanate (B) and inorganic particles (C) containing a phase change material.