Resin Composition with Plate-Like Magnesium Hydroxide and Basic Sulfate
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Solution Overview
Problem
Needle-like basic magnesium sulfate, while effective as a reinforcing agent for improving flexural modulus, lacks impact strength and surface smoothness in molded articles, necessitating a composition that balances mechanical strength, molding productivity, and appearance.
Innovation Solution
A resin composition combining plate-like magnesium hydroxide and needle-like basic magnesium sulfate, with specific crystal dimensions and aspect ratios, to enhance mechanical strength and appearance of molded articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If needle-like basic magnesium sulfate is used as a reinforcing agent, then flexural modulus is improved, but impact strength and surface smoothness deteriorate
Solution Approach 1:
The patent uses a composite reinforcing system combining needle-like basic magnesium sulfate (providing flexural modulus) with plate-like magnesium hydroxide (improving impact strength and surface smoothness). This composite approach allows both materials to contribute their respective advantages, resolving the contradiction between flexural modulus and impact strength/surface quality
2Strength
If needle-like basic magnesium sulfate is used as a reinforcing agent, then flexural modulus is improved, but surface smoothness of molded article deteriorates
Solution Approach 1:
The combination of needle-like basic magnesium sulfate and plate-like magnesium hydroxide creates a composite system where the plate-like particles fill voids and smooth the surface while the needle-like particles provide structural reinforcement, simultaneously achieving both flexural modulus improvement and surface smoothness
3Weight of moving object
If resin is substituted by plastic to reduce weight, then weight is reduced, but mechanical strength and thermal resistance deteriorate
Solution Approach 1:
The patent creates a composite resin material combining polymer matrix with dual mineral fillers (needle-like basic magnesium sulfate and plate-like magnesium hydroxide). This composite structure provides reinforcement that compensates for the lower strength of plastics, enabling weight reduction while maintaining mechanical properties
Solution Approach 2:
The patent optimizes the aspect ratios (needle-like: 10-100, plate-like: 20-100) and content ratios (0.1-0.9:0.9-0.1) of the reinforcing particles to achieve the best balance between weight reduction and mechanical strength enhancement
Data Source
AI summary
A resin composition which overcomes the defects of needle-like basic magnesium sulfate and has good balance among mechanical strength, molding productivity and the appearance of a molded article. The resin composition comprises (i) 100 parts by weight of a resin (component A), (ii) plate-like magnesium hydroxide having a crystal thickness (y) of 0.2 μm or less, a crystal width (x) of 3.5 to 10 μm and an aspect ratio of 20 to 100 (component B) and (iii) needle-like basic magnesium sulfate (component C), wherein the total content of the components B and C is 1 to 100 parts by weight based on 100 parts by weight of the resin, and the weight ratio of the component B to the component C is 0.1 to 0.9:0.9 to 0.1.