Core-Shell Rubber Resin Composition for Low-Viscosity Stereolithography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing curable resin compositions used in stereolithography have high viscosity and insufficient impact resistance, limiting their ability to produce three-dimensional shaped products with high durability.
Innovation Solution
A curable resin composition incorporating core-shell type rubber particles with a core layer of rubbery elastic body and a shell layer containing alicyclic hydrocarbon groups, along with a radically polymerizable compound, is developed to reduce viscosity and enhance impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If elastomer particles are added to improve impact resistance, then impact resistance increases, but viscosity increases remarkably
Solution Approach 1:
The patent changes the chemical composition parameters of the shell layer polymer, specifically incorporating alicyclic hydrocarbon groups to reduce viscosity while maintaining impact resistance. This parameter change allows the system to achieve both high impact resistance and low viscosity simultaneously.
Solution Approach 2:
The patent uses composite core-shell structure where the core provides rubbery elasticity for impact resistance and the shell layer containing alicyclic hydrocarbon groups provides low viscosity. This composite material approach allows combining the beneficial properties of different material components.
2Strength
If urethane (meth) acrylate is used as radically polymerizable compound, then impact resistance improves, but viscosity becomes high
Solution Approach 1:
The patent changes the molecular structure parameters of the radically polymerizable compound by incorporating alicyclic hydrocarbon groups into the shell layer, which reduces viscosity while maintaining the impact resistance benefits of urethane (meth) acrylate.
Solution Approach 2:
The patent applies local quality by having different functional regions: the core layer provides rubbery elasticity for impact resistance while the shell layer with alicyclic hydrocarbon groups provides low viscosity characteristics, allowing each region to optimize its local function.
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 low viscosity and improved impact resistance, facilitating the production of durable three-dimensional shaped products with enhanced workability and handling.
Implementation Method 1
a radical polymerization initiator... the radically polymerizable compound contains 2 mass % to 70 mass % of radically polymerizable compound having 500 or more molecular weight
Data Source
AI summary
To provide a low-viscosity curable resin composition capable of obtaining a cured product excellent in impact resistance. The curable resin composition contains core-shell type rubber particles, a radically polymerizable compound having one or more radically polymerizable functional groups in the molecule, and a radical polymerization initiator, and the core-shell type rubber particles have a core layer and a shell layer containing a polymer having an alicyclic hydrocarbon group in a side chain, and the radically polymerizable compound contains a radically polymerizable compound having a molecular weight of 500 or more in a ratio of 2 mass % to 70 mass %.