Anti-yellowing Resin Composition for Metal-Resin Composites
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Solution Overview
Problem
The resin layer in existing metal-resin composites tends to yellow over time, affecting the appearance and mechanical properties of products, leading to reduced service life.
Innovation Solution
A combination of a pentaerythritol ester and an inorganic phosphate salt is used as an anti-yellowing composition, with the phosphate salt concentration ranging from 100 to 1600 parts by weight relative to the pentaerythritol ester, to inhibit yellowing in the resin layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pentaerythritol ester type antioxidant or organic phosphite type antioxidant is added to the resin composition, then the resin layer shows initial resistance to oxidation, but the resin layer still yellowes over time, affecting appearance and mechanical properties
Solution Approach 1:
The patent combines a pentaerythritol ester type antioxidant (0.1-5 parts by weight) with an inorganic phosphate salt (100-1600 parts by weight) to form a composite anti-yellowing system. This composite approach leverages the synergistic effect between the two components, where the pentaerythritol ester provides primary antioxidant protection and the inorganic phosphate salt enhances long-term stability, preventing yellowing and maintaining mechanical properties throughout the service life of the resin layer.
2Ease of manufacture
If conventional antioxidants are used in the resin composition, then the manufacturing process is simple, but the resin layer becomes brittle and mechanical properties are reduced
Solution Approach 1:
The patent optimizes the concentration parameters of the antioxidant components, specifically using 0.1-5 parts by weight of pentaerythritol ester type antioxidant and 100-1600 parts by weight of inorganic phosphate salt. This parameter optimization ensures effective anti-yellowing performance while preventing excessive cross-linking or degradation that would cause brittleness, thereby maintaining the mechanical properties of the resin layer.
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 anti-yellowing composition effectively prevents yellowing of the resin layer, maintaining the appearance and mechanical performance of metal-resin composites, making them suitable for electronic product shells.
Implementation Method 1
using a pentaerythritol ester type antioxidant and an inorganic phosphate salt in combination can effectively inhibit the yellowing of the resin layer in a metal-resin composite
Data Source
AI summary
The present disclosure discloses an anti-yellowing composition comprising at least a phosphorus-containing compound and at least a pentaerythritol ester, wherein the phosphorus-containing compound is selected from a phosphate salt, and a concentration of the phosphorus-containing compound is 100-1600 parts by weight, relative to 100 parts by weight of the pentaerythritol ester. The present disclosure also discloses a resin composition containing the anti-yellowing composition, and a metal-resin composite formed with the resin composition and a metal substrate, and a preparation method and use thereof. The present disclosure further discloses an electronic product shell formed with the resin composition and a metal shell body.