Aging-resistant color master batch for rigid PVC and preparation method thereof

By modifying rigid PVC materials with composite fillers and ammoniation treatment, a stable interface transition layer is constructed, which solves the aging and performance degradation problems of rigid PVC materials during long-term use and realizes the application of color masterbatches with high dispersibility and high performance.

CN122188306APending Publication Date: 2026-06-12SHANDONG YOUHE NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG YOUHE NEW MATERIALS CO LTD
Filing Date
2026-04-22
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing rigid PVC materials are prone to molecular chain degradation, dehydrochlorination, surface chalking, discoloration, embrittlement, and mechanical property degradation during long-term use. Furthermore, existing color masterbatches are prone to problems such as pigment or filler agglomeration, uneven dispersion, and poor interfacial compatibility when added in high proportions, leading to a decline in material performance.

Method used

Surface modification treatment was carried out using zinc-loaded montmorillonite, nano-silica and nano-titanium dioxide composite filler. Combined with ammoniated pigments and ammoniated polyvinyl chloride, an organic coating layer was constructed through free radical polymerization to form a stable interfacial transition layer, which enhanced the bonding between inorganic particles and PVC matrix, introduced hindered amine-type anti-aging function, and improved the aging resistance and mechanical properties of the material.

Benefits of technology

It significantly improves the aging resistance and mechanical property retention rate of rigid PVC materials, ensures good dispersibility and dispersion stability of materials with a high proportion of masterbatch, and improves Shore hardness, tensile strength and notched impact strength.

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Abstract

The application discloses an anti-aging color master batch for hard PVC and a preparation method thereof, and belongs to the technical field of color master batch processing, and is used for solving the technical problems that the hardness, pigment dispersibility, mechanical strength and anti-aging performance of the hard PVC material in the prior art need to be further improved, and specifically comprises the following components in parts by weight: 35-40 parts of low-polymerization-degree polyvinyl chloride, 18-22 parts of ammoniated polyvinyl chloride, 30-40 parts of anti-aging color fillers and 1-3 parts of auxiliary additives. The application is characterized in that an organic coating layer is constructed on the surface of the activated fillers and the ammoniated pigments after the activated fillers are prepared, and the ammoniated polyvinyl chloride is used as a compatibilization carrier, so that the color master batch still has good dispersion stability, a high Shore hardness, excellent tensile strength and notched impact strength at a high addition ratio, and can still maintain good mechanical properties after aging.
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