Curable Resin Composition for 3D Printing
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Solution Overview
Problem
Existing photocurable resin compositions for three-dimensional shaping lack sufficient impact strength and compatibility between thermal resistance and toughness, leading to inadequate performance under impact and thermal stress.
Innovation Solution
A curable resin composition comprising an oxetane compound with one oxetanyl group and at least one hydroxyl group, a cationic polymerizable compound with multiple reactive groups, and rubber particles with reactive groups on their surface, optimized in terms of content ratio and molecular weight to achieve balanced thermal resistance and toughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a photocurable resin composition including a cationic polymerizable compound, a radical polymerizable compound, and rubber particles is used, then toughness (snap-fit property) is improved, but strength when impacted is insufficient and compatibility between thermal resistance and toughness is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the resin composition by specifying an oxetane compound with one oxetanyl group and at least one hydroxyl group, containing at a specific ratio (30-60 parts by mass based on 100 parts by mass of total mass of the oxetane compound and the cationic polymerizable compound). This parameter optimization resolves the contradiction by achieving both high impact strength and thermal resistance compatibility
Solution Approach 2:
The patent creates a composite resin composition system combining the oxetane compound (A), cationic polymerizable compound (B), rubber particle (C) with surface reactive groups, and curing agent (D). This composite approach allows the material to simultaneously achieve toughness from rubber particles, thermal resistance from the oxetane-cationic polymer system, and impact strength from the synergistic interaction of all components
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 a cured product with excellent thermal resistance and toughness, ensuring high impact strength and compatibility, making it suitable for three-dimensional shaping applications.
Implementation Method 1
an oxetane compound (A) having one oxetanyl group as a cationic polymerizable reactive group and at least one hydroxyl group; a cationic polymerizable compound (B) which is a cationic polymerizable compound other than the oxetane compound (A) and has two or more cationic polymerization reactive groups
Implementation Method 2
the rubber particle (C) has a group capable of reacting with the oxetane compound (A) or the cationic polymerizable compound (B) on a surface of the rubber particle (C)
Data Source
AI summary
A curable resin composition includes: an oxetane compound (A) having one oxetanyl group as a cationic polymerizable reactive group and at least one hydroxyl group; a cationic polymerizable compound (B) which is a cationic polymerizable compound other than the oxetane compound (A) and has two or more cationic polymerization reactive groups; a rubber particle (C); and a curing agent (D), wherein the oxetane compound (A) is contained at 30 parts by mass or more and 60 parts by mass or less, based on 100 parts by mass of total mass of the oxetane compound (A) and the cationic polymerizable compound (B), and the rubber particle (C) has a group capable of reacting with the oxetane compound (A) or the cationic polymerizable compound (B) on a surface of the rubber particle (C).