Hydrosilylation-Curable Silicone Composition for Low-Temperature Curing
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Solution Overview
Problem
Hydrosilylation-curable silicone compositions face challenges in maintaining storage stability and preventing surface wrinkling when cured at low temperatures, while achieving good curability.
Innovation Solution
Incorporating a maleate compound and a hydrosilylation inhibitor in specific ppm ranges, along with an organopolysiloxane, organohydrogenpolysiloxane, and a hydrosilylation catalyst, to form a composition that can be cured at low temperatures without surface wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the curing temperature is reduced and curing time is shortened, then curability is improved, but storage stability deteriorates markedly
Solution Approach 1:
The patent applies parameter changes by carefully controlling the concentrations of two different inhibitors (maleate compound at 50-6000 ppm and hydrosilylation inhibitor at 200-20000 ppm) to achieve the optimal balance between storage stability and curability. This dual-inhibitor system with specific concentration ranges allows the composition to maintain stability during storage while enabling rapid curing when activated.
2Use of energy by stationary object
If the curing temperature is reduced, then energy consumption is decreased, but surface wrinkling of cured products is promoted
Solution Approach 1:
The patent uses parameter changes by optimizing the concentration ratio between the maleate compound and hydrosilylation inhibitor, along with controlling the organohydrogenpolysiloxane content, to enable low-temperature curing without surface wrinkling. The specific parameter ranges provided ensure that the curing reaction proceeds uniformly even at reduced temperatures.
Solution Approach 2:
The patent employs a composite inhibitor system combining two different types of inhibitors (maleate compound and hydrosilylation inhibitor) with distinct mechanisms of action. This composite approach provides synergistic effects that prevent surface wrinkling while enabling low-temperature curing, achieving better performance than single-inhibitor systems.
3Device complexity
If a single hydrosilylation inhibitor is used, then the composition is simple, but it is difficult to consistently achieve both good curability and prevent surface wrinkling
Solution Approach 1:
The patent implements a composite inhibitor system using two different inhibitors (maleate compound and hydrosilylation inhibitor) that work through different mechanisms. This composite approach provides consistent control over both curability and surface quality, overcoming the limitations of single-inhibitor systems while maintaining manageable composition complexity through defined concentration ranges.
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 exhibits good storage stability and prevents surface wrinkling during low-temperature curing, maintaining excellent curability and mechanical characteristics of the cured product.
Implementation Method 1
at least one hydrosilylation inhibitor is added to adjust curability and storage stability of the compositions
Implementation Method 2
a hydrosilylation catalyst, in an amount sufficient to accelerate curing of the composition
Implementation Method 3
Hydrosilylation-curable silicone compositions form cured products having excellent characteristics
Data Source
AI summary
The present invention relates to a hydrosilylation-curable silicone composition comprising: a maleate compound, and a hydrosilylation inhibitor other than the maleate compound, wherein the content of the maleate compound is in an amount of 50 to 6,000 ppm and the content of the hydrosilylation inhibitor is in an amount of 200 to 20,000 ppm, with respect to the present composition in terms of mass units, respectively. The hydrosilylation-curable silicone composition exhibits good storage stability, and can be cured to form a cured product that suffers no surface wrinkling.