Curable Thermal Interface Composition for Flexible Heat Dissipation
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Solution Overview
Problem
Existing thermally conductive silicone elastomers and resin compositions for heat dissipation materials lack flexibility, shape stability, and thermal conductance, leading to issues such as contact failure, outflow, and impaired thermal conductance due to temperature changes and dimensional mismatch.
Innovation Solution
A curable composition comprising compounds with (meth)acrylate groups, a polymerization initiator, a dispersant, and thermally conductive fillers like zinc or magnesium oxide, which upon curing, provide flexibility, shape stability, and maintain thermal conductance even at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a silicone-based resin is used as a thermal interface material, then flexibility is improved, but shape stability deteriorates due to low-molecular-weight siloxane component outflow over extended periods
Solution Approach 1:
The patent uses a composite material system combining organopolysiloxane (for flexibility and thermal conductivity) with polyester polymer and silane-modified polyester polymer (for shape stability and adhesion). This composite approach allows the material to exhibit both flexibility from the silicone component and shape stability from the polyester crosslinked network, resolving the contradiction between these two properties.
Solution Approach 2:
The patent changes the chemical composition parameters by incorporating specific ratios of polyester polymer and silane-modified polyester polymer, and by adding crosslinking agents. This parameter adjustment transforms the material properties to achieve both flexibility and shape stability simultaneously, preventing low-molecular-weight siloxane outflow while maintaining operational flexibility.
2Stability of the object's composition
If the thermal interface material is made rigid to improve shape stability, then flexibility deteriorates, causing peeling or breakage due to thermal expansion differences
Solution Approach 1:
The patent employs a composite material system where organopolysiloxane provides flexibility and thermal conductivity, while polyester polymer and silane-modified polyester polymer provide shape stability. The crosslinked network structure of the polyester components prevents peeling and breakage during thermal cycling, while the overall material maintains flexibility through the silicone-based resin matrix.
3Reliability
If the content of thermally conductive filler is increased to improve thermal conductance, then viscosity increases, making application difficult
Solution Approach 1:
The patent adjusts the composition parameters by incorporating polyester polymer and silane-modified polyester polymer with specific molecular weights and functional groups. These compositional changes modify the viscosity characteristics of the uncured material, allowing high thermally conductive filler content (70-95 wt%) to be achieved while maintaining pumpable and applicable consistency through the polymer matrix.
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 flexibility, shape stability, and thermal conductance, suppressing changes in thermal conductivity at high temperatures, with improved adhesiveness and reworkability on heat generators and radiators.
Implementation Method 1
a curable composition, containing: a compound (A) having one (meth)acrylate group in one molecule; a compound (B) having two or more (meth)acrylate groups in one molecule; a polymerization initiator (C)
Implementation Method 2
a thermally conductive filler (E) containing zinc oxide... a thermally conductive filler (E) containing magnesium oxide... maintaining thermal conductivity even at high temperatures
Data Source
AI summary
A curable composition and a cured material containing: a compound (A) having one (meth)acrylate group in one molecule; a compound (B) having two or more (meth)acrylate groups in one molecule; a polymerization initiator (C); a dispersant (D); and a thermally conductive filler (E) containing zinc oxide.