Curable Composition Using Silane-Treated Titanium Oxide Pigments
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Solution Overview
Problem
The existing composition of 2-cyanoacrylate and titanium oxide-based pigments for forming white cured resin portions has low adhesion speed and storage stability, which affects concealability and adhesiveness.
Innovation Solution
Incorporating particles containing both titanium oxide and silicon oxide into the 2-cyanoacrylate composition to enhance storage stability and adhesion speed, with the particles being coated or partially coated with silicon oxide to improve concealability and adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If titanium oxide treated with polysiloxane is used as a pigment in 2-cyanoacrylate composition, then storage stability and concealability are improved, but adhesion speed decreases
Solution Approach 1:
The invention changes the surface treatment parameters of titanium oxide particles by using silane coupling agents with specific functional groups (alkoxy silane, epoxy silane, isocyanate silane, or azirine silane) instead of polysiloxane. This parameter change in the surface treatment chemistry maintains storage stability while improving adhesion speed by creating different chemical interactions with the 2-cyanoacrylate resin.
Solution Approach 2:
The invention creates a composite structure where titanium oxide particles are surface-treated with specific silane compounds, forming a composite pigment that combines the high refractive index of titanium oxide with the adhesive properties of silane functional groups. This composite approach resolves the contradiction by integrating both storage stability and adhesion speed requirements into a single material system.
2Ease of manufacture
If titanium oxide-based pigment is blended to form white cured resin portion, then concealability of defective portions is improved, but adhesion speed and storage stability decrease
Solution Approach 1:
The invention changes the chemical parameters of the pigment surface by selecting specific silane coupling agents with different functional groups (alkoxy, epoxy, isocyanate, or azirine). This parameter optimization allows the pigment to maintain its white color and concealability while improving storage stability through enhanced chemical compatibility with the 2-cyanoacrylate resin system.
3Ease of manufacture
If conventional 2-cyanoacrylate composition with titanium oxide is used, then white color and concealability are achieved, but adhesion speed is low
Solution Approach 1:
The invention optimizes the adhesion speed parameter by changing the surface chemistry of titanium oxide particles through treatment with silane coupling agents having reactive functional groups. These functional groups accelerate the anionic polymerization of 2-cyanoacrylate, thereby increasing adhesion speed while maintaining the white color and concealability properties of the titanium oxide pigment.
Solution Approach 2:
The silane coupling agent acts as an intermediary substance between the titanium oxide pigment particles and the 2-cyanoacrylate resin. This intermediary provides reactive functional groups that facilitate faster chemical interaction and bonding, resolving the adhesion speed limitation while preserving the optical properties of the pigment.
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 curable composition exhibits improved storage stability, high adhesion speed, and excellent concealability of defective portions, enhancing workability and productivity in forming integrated products with white-based cured resin portions.
Implementation Method 1
the use of particle containing both titanium oxide and silicon oxide as the titanium oxide-containing particle was found to provide an excellent cured resin forming material
Implementation Method 2
A 2-cyanoacrylate is polymerized and cured in a short period of time by anion species of moisture and the like on a surface of an adherend and in air because of its high anionic polymerizability
Implementation Method 3
Titanium oxide is widely used as a pigment blended in a coating material that imparts a film having a high whiteness
Data Source
AI summary
The present invention is a curable composition characterized by including a 2-cyanoacrylate and a particle containing titanium oxide and silicon oxide. The preferable content of the particle is in a range from 0.1 to 10.0 parts by mass based on 100 parts by mass of the 2-cyanoacrylate.