Room Temperature Curable Resin Composition with Hindered Amine Light Stabilizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current room temperature curable resin compositions face challenges with time degradation due to ultraviolet light exposure, leading to deterioration in physical properties and appearance, and conventional hindered amine-based light stabilizers suffer from volatility and insufficient weather resistance.
Innovation Solution
A room temperature curable resin composition incorporating an organopolymer with silanol or hydrolyzable silyl groups and an organosilicon compound featuring an organosiloxane structure and a hindered amine skeleton, which enhances weather resistance and crack resistance by suppressing ultraviolet degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hindered amine-based light stabilizers are used, then weather resistance is improved, but the light stabilizer volatilizes during long-term use and falls off due to bleed and bloom phenomena
Solution Approach 1:
The patent combines the hindered amine light stabilizer with a silicone polymer having hydrolyzable silyl groups, merging two functional components into a single integrated system. The light stabilizer is incorporated into the polymer structure through chemical bonding, creating a unified composition that prevents volatilization and bleed-off while maintaining weather resistance properties.
Solution Approach 2:
The invention creates a composite material system consisting of a silicone polymer base and a hindered amine light stabilizer. This composite structure allows the light stabilizer to be permanently integrated into the polymer matrix through siloxane bond formation, eliminating the problems of volatilization and surface bloom associated with conventional physical mixing approaches.
2Loss of substance
If hindered amine-based light stabilizer is directly bonded to resin material, then bleed and bloom phenomena are suppressed, but weather resistance is not sufficiently improved
Solution Approach 1:
The patent modifies the chemical structure parameters of the light stabilizer by introducing hydrolyzable silyl groups onto the hindered amine molecule. This structural parameter change enables the light stabilizer to form permanent siloxane bonds with the silicone polymer, simultaneously achieving both suppression of bleed-bloom phenomena and enhancement of weather resistance through the same molecular modification.
3Strength
If curable resin composition is used, then rubber elasticity is achieved, but time degradation occurs due to action of light such as ultraviolet rays
Solution Approach 1:
The patent converts the harmful effect of ultraviolet light into a beneficial process by using photopolymerization. The composition contains photopolymerizable groups that undergo crosslinking upon exposure to ultraviolet light, creating a durable crosslinked network structure. This not only prevents time degradation but also enhances the rubber elasticity and mechanical properties of the cured product.
Solution Approach 2:
The invention creates a composite system combining photopolymerizable monomers with silicone polymers having hydrolyzable silyl groups. This composite structure allows simultaneous achievement of rubber elasticity through photopolymerization and enhanced UV resistance through the formation of crosslinked siloxane networks, effectively preventing time degradation while maintaining flexibility.
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 improved weather resistance and crack resistance, outperforming conventional light stabilizers in maintaining the integrity of the cured product under prolonged exposure to ultraviolet light.
Implementation Method 1
an organopolymer having both ends of the molecular chain blocked with a silicon group that can crosslink by forming a siloxane bond (Si-O-Si bond) using moisture (water) in the air at room temperature
Implementation Method 2
Organopolymers having end of the molecular chain preferably blocked with the reactive silicon group crosslink and cure in the presence of moisture
Implementation Method 3
an organosilicon compound having an organosiloxane structure, a hydrolyzable silyl group, and a hindered amine skeleton in the molecule... exhibits an excellent effect of light stabilization, particularly effect of imparting weather resistance
Data Source
AI summary
The present invention is a room temperature curable resin composition comprising: as the main agent, an organic polymer in which both molecular chain terminals are sealed by a silanol group and/or a hydrolyzable silyl group; and an organic silicon compound of a specific structure having, in a molecule, an organosiloxane structure, a hydrolyzable silyl group, and a hindered amine skeleton. This resin composition produces a cured product in which the degradation over time associated with the effects of light such as UV rays can be suppressed.