Resin Additive Surface Treatment for High Inorganic Loading
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Solution Overview
Problem
Inorganic particles generally have poor miscibility with resins, leading to reduced dispersibility and difficulties in incorporating high amounts of inorganic particles into resins, which results in decreased thermal conductivity and increased water absorption in resin compositions.
Innovation Solution
A method for producing a resin additive involves mixing inorganic particles with an organic acid and a pH adjusting agent to form a surface treatment layer, followed by a post-treatment with a nitrogen-containing agent to enhance the affinity and miscibility of inorganic particles with resins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inorganic particles are incorporated into resins without surface treatment, then the manufacturing process is simple, but the dispersibility and miscibility of inorganic particles with resins are poor
Solution Approach 1:
The patent applies preliminary surface treatment to inorganic particles before incorporating them into resins. The surface treatment layer is formed in advance on the inorganic particles, modifying their surface properties to improve miscibility and dispersibility with resins, thereby resolving the contradiction between manufacturing simplicity and dispersibility.
2Quantity of substance
If the content of inorganic particles in resin compositions is increased, then thermal conductivity is enhanced, but water absorption increases and dispersibility deteriorates
Solution Approach 1:
The patent introduces a surface treatment layer as an intermediary substance between inorganic particles and resins. This intermediate layer improves the interface compatibility, allowing higher inorganic particle content to be incorporated while maintaining low water absorption and good dispersibility, thus resolving the contradiction between quantity enhancement and harmful factor reduction.
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 produced resin additive improves the miscibility of inorganic particles with resins, allowing for higher inorganic particle content, enhanced thermal conductivity, and reduced water absorption in the resulting resin compositions.
Implementation Method 1
mixing inorganic particles, an organic acid, and a pH adjusting agent to obtain a mixture having a pH of 5 or more and 9 or less; a pre-treatment step of treating the surface of the inorganic particles with the organic acid to form a surface treatment layer
Implementation Method 2
a post-treatment step of treating the inorganic particles having the surface treatment layer formed thereon with a nitrogen-containing post-treatment agent to form a post-treatment layer on the surface of the inorganic particles
Data Source
AI summary
To provide a method for producing a resin additive with which inorganic particles can be incorporated in large amounts into resins and which has satisfactory flowability even when having a high inorganic-particle content and can improve thermal conductivity and lower water absorption. A method for producing a resin additive comprising a mixing step in which inorganic particles, an organic acid, and a pH adjusting agent are mixed together to obtain a mixture having a pH of 5-9, a pretreatment step in which the surface of the inorganic particles is treated with an organic acid to form a surface treatment layer having a functional group, and a post-treatment step in which the inorganic particles having the surface treatment layer are treated with a nitrogen-containing post-treatment agent to form a post-treatment layer on the surface of the inorganic particles.