SMP Sealant Stabilizer Composition for UV and Heat Resistance
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Solution Overview
Problem
Current stabilizer compositions for silyl-modified polymer (SMP) sealants and adhesives face issues with yellowing, hazardous classifications, poor solubility, and difficult application due to solid powder forms, which affect their heat and weathering resistance and mechanical properties.
Innovation Solution
A stabilizer composition combining oxalanilide UV absorbers, (2-hydroxyphenyl)-s-triazine UV absorbers, oligomeric hindered amine light stabilizers, and phenolic antioxidants, optionally with a liquid diluent, providing improved UV and heat stability without initial yellowing and hazardous classifications, and offering better solubility and application ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stabilizer compositions are used in SMP sealants, then UV and heat stability are provided, but yellowing occurs and hazardous classifications are assigned
Solution Approach 1:
The patent changes the chemical parameters of the stabilizer composition by selecting specific oxalanilide UV absorbers and oligomeric HALS with particular molecular structures and properties that do not cause yellowing or hazardous classification, while maintaining effective UV and heat stabilization
Solution Approach 2:
The patent creates a composite stabilizer system combining oxalanilide UV absorbers with oligomeric hindered amine light stabilizers, where the synergistic interaction between these two components provides comprehensive protection without the adverse effects of conventional single-component stabilizers
2Reliability
If solid powder stabilizers are used, then UV protection is provided, but solubility is poor and application is difficult
Solution Approach 1:
The patent changes the physical state parameter of the stabilizers from solid powder to liquid or low-viscosity forms, enabling better solubility in the SMP sealant matrix and easier application without compromising UV protection efficacy
Solution Approach 2:
The patent uses oligomeric HALS as an intermediary carrier that provides both UV stabilization and improved solubility, acting as a bridge between the stabilizer function and the sealant matrix compatibility
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 stabilizer composition enhances the UV and heat stability of SMP sealants and adhesives, prevents initial yellowing, maintains mechanical properties, and ensures compliance with EU regulations, with improved solubility and application convenience.
Implementation Method 1
stabilizer compositions comprising at least one oxalanilide UV absorber and/or at least one (2-hydroxyphenyl)-s-triazine UV absorber
Implementation Method 2
at least one oligomeric hindered amine light stabilizer (HALS)
Implementation Method 3
optionally further comprising at least one phenolic antioxidant
Data Source
AI summary
The invention is directed to stabilizer compositions comprising at least one oxalanilide UV absorber and/or at least one (2-hydroxyphenyl)-s-triazine UV absorber, and at least one oligomeric hindered amine light stabilizer (HALS), optionally further comprising at least one phenolic antioxidant, at least one liquid diluent and/or further components. Said stabilizer compositions are preferably used in sealants or adhesives based on silyl-modified polymers (SMP). The invention also deals with a polymer composition based on silyl-modified polymers (SMP) comprising the new stabilizer combination of oxalanilide UV absorber and/or (2-hydroxyphenyl)-s-triazine UV absorber, and oligomeric hindered amine light stabilizer (HALS), optionally further comprising phenolic antioxidant and liquid diluent and/or further components.