Alkoxysilyl-Ethylene Silicon Compound for Room-Temperature Curable Polysiloxane
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Solution Overview
Problem
Conventional room temperature-curable organopolysiloxane compositions face challenges with rapid curability, storage stability, and durability, particularly when using reactive alkoxysilyl groups, which result in low reactivity with moisture and adverse effects on durability.
Innovation Solution
A silicon-containing compound with an alkoxysilyl-ethylene group at its terminal is used as a base polymer or curing agent in a room temperature-curable organopolysiloxane composition, enhancing rapid curability, storage stability, and durability through improved hydrolyzable properties and crosslinking reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a polyorganosiloxane with terminal alkoxysilyl groups is used as a base polymer, then storage stability is improved, but curability deteriorates due to low reactivity with moisture
Solution Approach 1:
The invention changes the chemical structure parameter by introducing an ethylene group adjacent to the alkoxysilyl group. This structural modification increases the reactivity with moisture while maintaining storage stability, resolving the contradiction between stability and curability
Solution Approach 2:
The invention creates a composite terminal group structure combining alkoxysilyl and ethylene groups. This composite structure achieves both storage stability (from the alkoxysilyl group) and rapid curability (from the ethylene-enhanced reactivity)
2Productivity
If an α-alkoxysilylmethyl terminal group is used to increase reactivity with moisture, then curability is improved, but durability deteriorates due to adverse effects from the adjacent functional group
Solution Approach 1:
The invention changes the functional group parameter by using ethylene instead of α-alkoxysilylmethyl. This substitution maintains high curability while eliminating the durability-damaging effects associated with the α-alkoxysilylmethyl group
Solution Approach 2:
The invention converts the potential harm of having a reactive adjacent group into a benefit by selecting ethylene, which provides reactivity enhancement without the harmful side effects on durability that plague other reactive groups
3Stability of the object's composition
If the terminal group is blocked by an alkoxysilyl group to maintain storage stability, then storage stability is improved, but curability changes (lower) with lapse of time
Solution Approach 1:
The invention changes the terminal group structure to include an ethylene group adjacent to the alkoxysilyl group. This modification ensures that curability remains high and consistent over time while maintaining storage stability, preventing the degradation of curability that occurs with conventional blocked terminals
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 achieves rapid curing and excellent physical properties, even after 12 months of storage, with improved heat resistance, water resistance, and humidity resistance, making it suitable for applications requiring adhesion and sealing in electronic and construction materials.
Implementation Method 1
a room temperature curable composition which cures an elastomer state at room temperature by a condensation and crosslinking reaction from contact with the moisture in the air
Implementation Method 2
a room temperature-curable organopolysiloxane composition comprising a polyorganosiloxane the terminal of which has been blocked by an alkoxysilyl, an alkoxysilane and an alkoxytitanium
Data Source
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AI summary
The present invention relates to an silicon-containing compound having an alkoxysilyl-ethylene group at its terminal including at least one silyl-ethylene bond represented by the following structural formula (a) in one molecule, and according to this compound, a novel base polymer used in a room temperature-curable polyorganosiloxane composition capable of providing a cured product that is particularly excellent in rapid curability, storage stability and durability can be provided.