Stabilizer Mixture for Plastics Against UV and Heat
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Solution Overview
Problem
Current light stabilizers for non-living organic materials, such as plastics, are inadequate in providing protection against high UV content and intense light, oxygen, and heat, leading to issues like yellowing, discoloration, and embrittlement.
Innovation Solution
A mixture comprising oligomeric compounds, specifically oligomeric compounds with repeat units of certain formulas, and acid-addition salts, combined with other compounds and additives, is used to stabilize non-living organic materials against light, oxygen, and heat exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional light stabilizers are used, then basic protection against light is provided, but protection against high UV content and intense light is inadequate
Solution Approach 1:
The patent employs a composite stabilizer system comprising multiple components: UV absorbers (compounds of formula I), HALS (compounds of formula II), and synergists (compounds of formula III). This composite approach combines the complementary mechanisms of each component to achieve superior protection against high UV content and intense light compared to single conventional stabilizers.
Solution Approach 2:
The patent optimizes the concentration ratios of different stabilizer components in the mixture. By adjusting the parameters of composition (specific ratios of UV absorber:HALS:synergist), the system achieves enhanced protection against intense light and UV radiation while maintaining stability.
2Reliability
If conventional stabilizers are used, then basic stabilization is provided, but resistance to oxygen and heat is insufficient
Solution Approach 1:
The stabilizer mixture is designed to provide multi-functional protection. The UV absorbers, HALS, and synergists work together to protect against multiple harmful factors simultaneously including light (UV and visible), oxygen, and heat. This universal stabilization approach addresses multiple degradation mechanisms rather than targeting single factors.
Solution Approach 2:
The composite nature of the stabilizer system allows different components to address different degradation pathways. The synergists specifically enhance protection against oxygen and heat while the UV absorbers and HALS handle light-related degradation, creating a comprehensive protective system.
3Reliability
If existing stabilizer formulations are used, then some protection is achieved, but yellowing and embrittlement occur
Solution Approach 1:
The patent converts the harmful effects of UV radiation and oxidation into beneficial protective mechanisms. The UV absorbers absorb harmful UV energy, the HALS scavenge free radicals formed during oxidation, and the synergists enhance both processes, thereby converting what would be harmful degradation pathways into controlled, protective reactions that prevent yellowing and embrittlement.
Solution Approach 2:
By optimizing the concentration parameters of the stabilizer components and their ratios to each other, the system achieves superior protection against yellowing and embrittlement. The specific parameter optimization ensures adequate stabilization while minimizing harmful effects.
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 described mixture effectively enhances the stability of non-living organic materials, particularly plastics, by providing improved resistance to high UV content and intense light, while also protecting against oxygen and heat, thereby preventing damage like yellowing and embrittlement.
Implementation Method 1
The invention relates to mixtures which comprise (a) an oligomeric compound, comprising repeat units of the general formula (I)... for the stabilization of non-living organic materials, in particular plastics, with respect to exposure to light, oxygen, and/or heat
Implementation Method 2
stabilization of non-living organic materials, in particular plastics, with respect to exposure to light, oxygen, and/or heat
Implementation Method 3
stabilization of non-living organic materials, in particular plastics, with respect to exposure to light, oxygen, and/or heat
Data Source
AI summary
The invention relates to mixtures, comprising(a) an oligomeric compound, comprising repeat units of the general formula (I) or acid-addition salts thereofand/or(b) a compound of the general formula (II) or acid-addition salts thereofand(c) at least one compound of the general formula (III)and(d) optionally further additives,and also to the use of these mixtures for the stabilization of non-living organic materials with respect to exposure to light, oxygen, and/or heat. The invention further relates to non-living organic materials, comprising at least one of these mixtures, and to articles produced therefrom. The invention further relates to a process for the stabilization of non-living organic materials, with respect to exposure to light, oxygen, and/or heat.