An anti-aging polyurethane material and a method for preparing the same

By introducing polydopamine-coated nano-titanium dioxide and furan glycol chain extenders into polyurethane materials, the aging problem of polyurethane materials in complex environments is solved, achieving high-efficiency anti-aging and excellent mechanical properties, and broadening the operating temperature range of the materials.

CN122213352APending Publication Date: 2026-06-16ANHUI YULIN NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI YULIN NEW MATERIAL TECH CO LTD
Filing Date
2026-03-20
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Polyurethane materials are prone to aging in outdoor or complex environments. Existing modification technologies cannot simultaneously improve durability and mechanical properties, and the problems of nanoparticle dispersion and migration of small organic molecule additives have not been effectively solved.

⚗Method used

By combining polydopamine-coated nano-titanium dioxide with a furan glycol chain extender, stable dispersion of nano-titanium dioxide in a polyurethane matrix is ​​achieved through π-π stacking and dynamic covalent bond interface bonding. The UV shielding and free radical scavenging capabilities of polydopamine delay photo-oxidative aging, while the dynamic covalent bonds provide strong interfacial bonding to improve mechanical properties.

🎯Benefits of technology

It effectively delays photo-oxidative aging of materials, improves tensile strength and elongation at break, broadens the damping temperature range of materials, and enhances the mechanical properties and anti-aging properties of materials in a wide temperature range.

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Abstract

The application discloses an anti-aging polyurethane material and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: in the first step, polyether polyol is vacuum dehydrated and then pre-polymerized with diisocyanate to obtain a prepolymer by reaction under the condition that the temperature is 60-70 DEG C; in the second step, a chain extender and polydopamine-coated nano titanium dioxide are added into the prepolymer and stirred, and then solidified. In the material, furan diol is used as the chain extender, and polydopamine-coated nano titanium dioxide is used as the anti-aging agent. The chain segment of the polyurethane material contains a benzene ring, and the benzene ring produces a pi-pi stacking effect with the aromatic ring of the o-diphenol / quinoxaline structure in the polydopamine structure. The titanium dioxide is stably and uniformly dispersed in the matrix, and agglomeration is avoided. Through the ultraviolet shielding and free radical capturing capacity of the polydopamine, the photo-oxidative aging of the material is effectively delayed from the physical shielding and chemical quenching double paths, and the mechanical properties such as tensile strength and elongation at break are improved.
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