Process for the preparation of a composite ultraviolet absorber
By utilizing a method for preparing composite ultraviolet absorbers, and taking advantage of the synergistic effect of triazine-benzotriazole compounds with hindered amine light stabilizers and antioxidants, a dynamic cross-linked network is formed, which solves the problems of insufficient absorption performance and stability of ultraviolet absorbers, and achieves efficient and stable ultraviolet protection.
CN119775634BActive Publication Date: 2026-01-13CHANGZHOU YONGHE FINE CHEM
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Patent Information
- Application Number
- CN202411986531.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2044-12-31
AI Technical Summary
Technical Problem
Existing UV absorbers have insufficient absorption performance, poor chemical and thermal stability, and high migration at high temperatures, which affects their effectiveness and safety.
Method used
A composite ultraviolet absorber is used, which is a triazine-benzotriazole compound as the ultraviolet absorber, combined with hindered amine light stabilizers, phenols or dithiophosphites as antioxidants, and forms a stable molecular network through a dynamic cross-linking agent to enhance absorption efficiency and stability.
Benefits of technology
It significantly improves UV absorption efficiency, extends service life, enhances chemical and thermal stability, reduces migration, and is suitable for high-temperature environments.
✦ Generated by Eureka AI based on patent content.
Abstract
The application relates to the technical field of ultraviolet absorbing materials, and discloses a preparation method of a composite ultraviolet absorbing agent, which comprises the following components in percentage by weight: 50-70% of an ultraviolet absorbing agent, 10-20% of a light stabilizer, 5-15% of an antioxidant, 2-5% of a dynamic crosslinking agent, and 0.5-2% of an auxiliary additive. The preparation method comprises the following steps: dissolving the ultraviolet absorbing agent, the light stabilizer and the antioxidant in a mixed solvent to stir and form a uniform solution, adding the dynamic crosslinking agent to perform crosslinking reaction, then removing the solvent by vacuum evaporation, and grinding and drying to obtain the target product. The composite ultraviolet absorbing agent is prepared through the synergistic effect of the components and the construction of a dynamic crosslinking network, the ultraviolet absorbing performance, the chemical stability, the thermal stability and the low migration property are remarkably improved, and the composite ultraviolet absorbing agent can be widely applied in the fields of plastics, coatings, textiles and the like.
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