Radiation Cure Silicone Compositions via Methacryloxy End-Capping
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Solution Overview
Problem
Existing methods for preparing silicones capable of radiation cure are expensive and often result in unwanted side products such as acids, which are difficult to remove.
Innovation Solution
A method involving the mixing of a siloxane with a compound containing a methylene linkage attached to a methacryloxy group, followed by exposure to conditions suitable for radiation curing, using photoinitiators and condensable silanes to facilitate chain extension and cross-linking, while maintaining control over molecular weights and viscosities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods are used to prepare radiation cure silicones, then radiation curing capability is achieved, but production cost increases and unwanted side products such as acids are generated
Solution Approach 1:
The patent extracts and removes the harmful byproduct formation mechanism from the preparation process. By using silane end-capped polyorganosiloxanes with methacryloxy groups that directly replace hydrolyzable groups without forming acidic byproducts, the harmful factor extraction principle is applied to eliminate acid generation while maintaining radiation curing capability
Solution Approach 2:
The patent employs a straightforward end-capping approach using readily available silane compounds with methacryloxy groups. This simple, cost-effective method replaces complex multi-step processes, achieving radiation curing capability through direct end-capping without requiring expensive catalysts or generating difficult-to-remove side products
2Reliability
If existing methods are used to prepare radiation cure silicones, then radiation curing capability is achieved, but production cost increases
Solution Approach 1:
The patent uses inexpensive silane end-capping agents with methacryloxy groups that can be directly incorporated into polyorganosiloxane chains. This approach replaces expensive complex synthesis routes with a simple, cost-effective end-capping method that achieves the desired radiation curing capability without requiring costly catalysts or multiple processing steps
Solution Approach 2:
The patent extracts the expensive and complex intermediate steps from traditional radiation cure silicone preparation. By directly end-capping polyorganosiloxanes with methacryloxy-silane compounds, the method eliminates costly catalyst systems and complex purification steps, achieving radiation curing capability through a streamlined, cost-effective process
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
This approach provides a cost-effective and efficient method for preparing radiation cure silicone compositions with controlled properties, reducing unwanted side products and improving curing efficiency.
Implementation Method 1
Radiation curing silicones having methacryloxy functional groups are known... cured upon exposure to UV radiation
Implementation Method 2
These mechanisms are based on either condensation reactions, whereby moisture hydrolyzes certain groups on the silicone backbone
Data Source
AI summary
The present invention relates to compositions which include compounds that are end-capped with silanes containing radiation cure groups. In addition, the invention relates to a method for preparing such compounds. In particular, the radiation cure groups are attached to the silane via a methylene linkage. Illustrative of the inventive compositions are those which include a compound of Formula (I).