Reactive Silicon Polymer Red Coloration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Reactive silicon group-containing polyethers used as sealants and adhesives often exhibit significant red coloration due to high levels of ionic impurities, which limits their application in these roles, as they are typically required to be colorless and transparent.
Innovation Solution
Development of reactive silicon group-containing polymers with Co content of 0.5 ppm or less, obtained through specific reactions involving hydroxylated polyethers, isocyanate group-containing silane compounds, and mercapto group-containing compounds, ensuring minimal ionic impurities and maintaining transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total content of ionic impurities is decreased to 20 ppm or less, then the storage stability is improved, but red coloration still occurs
Solution Approach 1:
The patent changes the chemical parameters by introducing specific organic compounds (hydroxylated polyether, isocyanate group-containing silane, mercapto group-containing compound) that react with ionic impurities to form neutral complexes. This transforms the problem from simply reducing impurity concentration to chemically modifying impurity behavior, thereby eliminating coloration while maintaining storage stability.
Solution Approach 2:
The patent uses organic compounds as intermediaries that mediate between the ionic impurities and the final product properties. These intermediaries react with metal ions to form stable complexes, preventing the ions from causing coloration while maintaining their beneficial effects on storage stability. The intermediary substances bridge the gap between impurity removal and color prevention.
2Adaptability or versatility
If reactive silicon group-containing polyether is used as sealant and adhesive, then the functionality is improved, but the external appearance deteriorates due to red coloration
Solution Approach 1:
The patent modifies the chemical composition parameters by adding specific organic compounds that react with ionic impurities. This changes the chemical state of impurities from free ions to complexed forms, eliminating their harmful optical effects while preserving the functional properties of the reactive silicon group-containing polyether for sealant and adhesive applications.
Solution Approach 2:
The patent converts the harmful effect of ionic impurities (causing red coloration) into a beneficial outcome by using them as reaction targets. The impurities react with added organic compounds to form stable, colorless complexes, thereby transforming a defect into an opportunity for improved product appearance while maintaining functionality.
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 polymers achieve a significant reduction in ionic impurities, preventing red coloration and maintaining the transparent appearance, thus expanding their application as sealants and adhesives.
Implementation Method 1
reacting a hydroxylated polyether which contains Co in a content of 0.5 ppm or less with an isocyanate group-containing silane compound
Implementation Method 2
reacting a mercapto group-containing compound
Data Source
AI summary
The present invention provides a solution to a problem that a composition including a reactive silicon group-containing polyether undergoes red coloration. More specifically, in a reactive silicon group-containing organic polymer which contains Co, the problem concerned is solved by limiting the Co content to 0.5 ppm or less. As the reactive silicon group-containing organic polymer, for example, a reactive silicon group-containing polyether (A) or a mixture of the reactive silicon group-containing polyether (A) and a vinyl polymer (B) may be cited. The reactive silicon group-containing polyether (A) is obtained, for example, by reacting a polyether or a derivative thereof which contains Co in a content of 0.5 ppm or less with a silane compound which has a group capable of reacting with the polyether or the derivative thereof and has a hydrolyzable group.