Alkaline Curable Organosilicon Composition
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Solution Overview
Problem
Existing curable compositions using polysiloxane-based macromonomers and silicon-containing compounds face limitations in stability, curability, and application due to insufficient water usage, lack of 1-propanol as a solvent, and insufficient radical curability, leading to inadequate scratch resistance and adherence to base materials.
Innovation Solution
A curable composition is developed by hydrolysis copolycondensation of silicon compounds under alkaline conditions, using 1-propanol as a solvent and a specific ratio of silicon compounds with methacryloyl or acryloyl groups, resulting in an organosilicon compound with enhanced stability, radical curability, and improved scratch resistance and adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hydrolysis copolycondensation is conducted with insufficient water, then gelation is restricted, but curability is insufficient
Solution Approach 1:
The invention changes the pH parameter from neutral/acidic to alkaline (pH 8-14), which fundamentally alters the hydrolysis copolycondensation mechanism. This enables complete utilization of water for siloxane bond formation while maintaining system stability through controlled alkaline catalysis, resolving the contradiction between limiting gelation and achieving sufficient curability
Solution Approach 2:
The invention introduces a specific alkaline catalyst as an intermediary to mediate the hydrolysis copolycondensation reaction. This catalyst enables the reaction to proceed completely with sufficient water, transforming the reaction pathway to achieve both complete curability and stability through controlled intermediate species formation
2Reliability
If acid catalyst is used for hydrolysis copolycondensation, then curability is achieved, but stability is insufficient
Solution Approach 1:
The invention inverts the conventional approach by using alkaline catalyst instead of acid catalyst. This reversal fundamentally changes the reaction mechanism and product stability, achieving both curability and enhanced stability through the opposite chemical pathway, where alkaline conditions produce more stable siloxane networks
3Ease of manufacture
If conventional hydrolysis copolycondensation is conducted, then organosilicon compound is produced, but radical curability is insufficient
Solution Approach 1:
The invention changes the chemical structure parameters by incorporating polymerizable functional groups (acryloyl or methacryloyl) into the organosilicon compound produced under alkaline conditions. This structural modification enables radical curability while maintaining ease of manufacture through the same hydrolysis copolycondensation process
4Stability of the object's composition
If polysiloxane-based macromonomer is used, then stability is achieved, but scratch resistance and adherence are insufficient
Solution Approach 1:
The invention creates a composite structure by combining the stable siloxane backbone with polymerizable functional groups that form crosslinked networks upon curing. This composite approach integrates the stability of polysiloxane with the mechanical strength and adhesion of crosslinked polymers, achieving both stability and enhanced scratch resistance and adherence
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 improved stability, curability, and physical properties such as hardness, mechanical strength, and chemical resistance, with a cured film exhibiting excellent scratch resistance and adherence to base materials.
Implementation Method 1
silicon compound (A1) and a silicon compound (B1) are subjected to hydrolysis copolycondensation under an alkaline condition
Implementation Method 2
hydrolysis copolycondensation of silicon compounds under alkaline conditions, using 1-propanol as a solvent
Data Source
AI summary
The present curable composition comprises an organosilicon compound produced by hydrolysis copolycondensation of (A) a silicon compound R0Si(R1)nX13-n [wherein R0 represents a (meth)acryloyl group; and X1 represents a hydrolyzable group] and (B) a silicon compound SiY14 [wherein Y1 represents a siloxane-bond forming group] under an alkaline condition at a ratio of compound (A) to compound (B) of 1:(0.3 to 1.8) by mol. The present process for producing an organosilicon compound comprises a reaction process of conducting alcohol exchange reaction of a silicon compound. SiY24 [wherein Y2 represents a siloxane-bond forming group] in 1-propanol to produce a composition; and a condensation process of adding a silicon compound R0Si(R1)nX23-n [wherein R0 represents a (meth)acryloyl group; and X2 represents a hydrolyzable group] to the composition to perform the hydrolysis copolycondensation of the silicon compounds under alkaline conditions.