Process for the production of titanium dioxide for polycarbonates with high gloss and impact resistance

By coating the surface of titanium dioxide with a loose mixture of silica and alumina and a barium sulfate film, and adding isopropyltris(dioctylphosphoyloxy)titanate, the contradiction between high gloss and lightweight in the prior art is resolved, and a polycarbonate composite material with high gloss and impact resistance is prepared.

CN122103699APending Publication Date: 2026-05-29中信钛业股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中信钛业股份有限公司
Filing Date
2026-04-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve lightweight polycarbonate composites with high flowability, high impact resistance, and high surface gloss without relying on high-density fillers, making it difficult to balance high gloss and lightweight properties, especially in applications such as drone shells and sports protective gear.

Method used

Titanium dioxide with high gloss and impact resistance was prepared by coating the surface of titanium dioxide with a loose mixture of silica and alumina, followed by a barium sulfate film, and adding isopropyltris(dioctylphosphoyloxy)titanate during air powder treatment.

Benefits of technology

This technology enables polycarbonate products to achieve lightweight, high gloss, and high impact resistance with the addition of a small amount of titanium dioxide, while ensuring high whiteness and processing stability, making them suitable for thin-wall molding.

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Abstract

The application relates to a production method of titanium white powder for polycarbonate with high gloss and impact resistance. The method is as follows: slushing titanium dioxide primary powder, dispersing the titanium dioxide with silicate after pH adjustment, sand grinding, coating a first layer of mixed film of loose silicon oxide and aluminum oxide under wet alkaline condition, coating a third layer of barium sulfate film under acid condition with pH=5.5-6.5, pressure filtration, drying, air powder treatment, adding isopropyl tri(dioctyl phosphoric acid acyl oxygen) titanate during air powder treatment, and obtaining the product. The method has the advantages of simple process, easy operation, high gloss and high impact resistance of polycarbonate products by adding a small amount of titanium white powder, processing stability, high whiteness of polycarbonate products and light weight.
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