Two-Pack Curable Resin Composition Working Life Control
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Solution Overview
Problem
Two-pack type curable resin compositions with (meth)acrylic groups face challenges in controlling working life and maintaining physical properties of the cured product, often resulting in a trade-off between prolonging working life and improving curability.
Innovation Solution
A two-pack type curable resin composition comprising a compound with (meth)acrylic groups, hydroperoxide, a copper or vanadium compound, a thiol group-containing compound, and saccharin, which allows for the control of working life and maintenance of physical properties by adjusting the proportions of these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the working life is prolonged by adjusting the composition, then the application time is extended, but the physical properties of the cured product decrease
Solution Approach 1:
The patent applies parameter changes by carefully controlling the amounts of specific components: hydroperoxide (0.01-5 parts relative to component (A)), copper compound (0.001-0.1 part) or vanadium compound (0.001-0.1 part), thiol compound (0.001-5 parts), and saccharin (0.01-5 parts). This precise parameter control enables simultaneous achievement of prolonged working life and maintained physical properties in the cured product.
2Productivity
If the curability is improved by adding accelerators, then the curing speed increases, but the working life shortens
Solution Approach 1:
The patent employs dynamics by using a multi-component system where the interaction between hydroperoxide, copper/vanadium compounds, thiol compounds, and saccharin creates a controllable reaction progression. This dynamic system allows the curing process to proceed at an appropriate speed while maintaining sufficient working life, resolving the trade-off between curing speed and working life.
3Productivity
If the mixture reacts quickly after mixing, then the curing efficiency is high, but the viscosity increases rapidly making application difficult
Solution Approach 1:
The patent applies preliminary action by incorporating saccharin into the composition, which delays the onset of rapid polymerization. This preliminary measure controls the reaction kinetics to prevent rapid viscosity increase, maintaining applicability while ensuring high curing efficiency once the reaction proceeds.
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 enables both the prolongation of working life and maintenance of physical properties, such as hardness and tensile strength, while ensuring operational efficiency and flexibility in application conditions.
Implementation Method 1
the component (C) being a copper compound and/or a vanadium compound
Implementation Method 2
the component (B) being hydroperoxide
Implementation Method 3
the component (A) being a compound having one or more (meth)acrylic groups in the molecule thereof; the component (D) being a compound having 2 to 6 thiol groups in the molecule thereof
Data Source
AI summary
In the present invention, the two-pack type curable resin composition using a compound having one or more (meth)acrylic groups in the molecule enables both of prolongation of a working life and maintenance of physical properties of a cured product. Prior art had a difficulty in controlling a working life continuously; however, the present invention can easily control the working life and therefore makes it possible to be used in various conditions. Provided is a two-pack type curable resin composition, containing components (A) to (E): component (A) being a compound having one or more (meth)acrylic groups in the molecule thereof; component (B) being hydroperoxide; component (C) being at least one type of copper compound and vanadium compound; component (D) being a compound having 2 to 6 thiol groups in the molecule thereof; and component (E) being saccharin.