Silicone Composition with Silica-Bonded Triazole for Low Compression Set
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Solution Overview
Problem
Existing silicone compositions with triazole compounds often result in a yellowish, cloudy rubber and do not achieve the optimal reduction of compression set, with higher kick-off temperatures during crosslinking.
Innovation Solution
An addition-crosslinkable silicone mixture comprising polyorganosiloxane with alkenyl groups, an SiH-functional crosslinking agent, a hydrosilylation catalyst, and 3-amino-1,2,4-triazole-5-thiol bonded to silica, which lowers compression set without coloration and reduces kick-off temperature, enabling faster and more satisfactory vulcanization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If triazole compound is added to the composition in the form of a solution in an organic solvent, then the dispersion of the triazole compound is improved, but the rubber becomes slightly yellow and cloudy
Solution Approach 1:
The patent extracts and removes the organic solvent from the triazole compound formulation, using pure triazole compound instead of a solution. This eliminates the source of yellowing and clouding while maintaining the necessary dispersion through alternative means in the silicone composition.
Solution Approach 2:
The patent changes the physical and chemical parameters of the triazole compound formulation by transitioning from a solvent-based solution to a pure compound form. This parameter change eliminates the harmful optical effects while preserving the functional benefits of the triazole compound.
2Reliability
If existing silicone compositions with triazole compounds are used, then compression set reduction is achieved, but the kick-off temperature during crosslinking is higher
Solution Approach 1:
The patent changes the chemical structure parameters of the triazole compound by selecting specific isomers and purity levels. This structural optimization allows the compound to function effectively at lower temperatures, reducing the kick-off temperature while maintaining compression set reduction benefits.
3Reliability
If existing silicone compositions with triazole compounds are used, then compression set reduction is achieved, but the rubber shows coloration
Solution Approach 1:
The patent removes organic solvents and other coloring impurities from the triazole compound formulation, using only the pure active compound. This extraction of harmful components eliminates coloration while preserving the compression set reduction functionality.
Solution Approach 2:
The patent optimizes the purity parameters of the triazole compound to above 97%, eliminating impurities that cause coloration. This high purity specification ensures colorless final product while maintaining effective compression set reduction.
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 silicone mixture achieves a lower compression set without yellowing and has a lower kick-off temperature, resulting in more rapid and effective crosslinking, producing a colorless and transparent silicone elastomer with improved properties.
Implementation Method 1
3-amino-1,2,4-triazole-5-thiol bonded to silica, which lowers compression set without coloration
Implementation Method 2
addition-crosslinkable silicone mixture comprising polyorganosiloxane with alkenyl groups, an SiH-functional crosslinking agent, and a hydrosilylation catalyst
Implementation Method 3
hydrosilylation catalyst
Implementation Method 4
3-amino-1,2,4-triazole-5-thiol bonded to silica, which lowers compression set without coloration and reduces kick-off temperature, enabling faster and more satisfactory vulcanization
Data Source
AI summary
Polyorganosiloxane compositions which are crosslinkable by means of hydrosilylation have improved compression set due to the incorporation of 3-amino-1,2,4-triazole-5-thiol bonded to silica.