A ceramic-like polyolefin composition and its preparation method and application

By using glass powder containing low melting point components and high temperature resistant ore powder, boron phosphate is generated by chemical reactions of boron oxide and phosphorus oxide, the problem of poor compatibility of porcelain fillers in the prior art is solved, and good carbon-forming, mechanical and processing properties of ceramic-like polyolefin compositions are achieved.

CN117417589BActive Publication Date: 2025-03-28KINGFA SCI & TECH CO LTD
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Patent Information

Application Number
CN202311148351.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-07
Publication Date
2025-03-28
Estimated Expiration
2043-09-07

AI Technical Summary

Technical Problem

During the carbonization process, the existing ceramic-like polyolefin materials have poor compatibility between the porcelain filler and the resin matrix, resulting in deterioration of mechanical properties and processing properties, making it difficult to maintain good carbon layer integrity without adding porcelain filler.

Method used

Using glass powder containing low melting point components and high temperature resistant ore powder as the main components, boron phosphate is formed by melting and flowing and chemical reaction at high temperatures through boron oxide and phosphorus oxide, forming a carbon layer with high heat resistance and porcelain formation effect.

Benefits of technology

It is achieved without adding porcelain filler to obtain a ceramic-like polyolefin composition with good carbon-forming effect, mechanical properties and processing properties. The elongation of the carbon layer is not less than 230% in break and maintains a good extrusion appearance at high shear rates.

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Abstract

The invention discloses a ceramic-like polyolefin composition and a preparation method and application thereof. The ceramic-like polyolefin composition comprises the following components calculated by weight: 35-80 parts of polyolefin resin; 25-50 parts of glass powder; 2-4 parts of silane coupling agent; 0-4 parts of processing aid; in the glass powder, the mass fraction of boron element is 0.4-7%, the mass fraction of phosphorus element is 1.0-11.5%, and the mass fraction of bismuth element is not less than 0.9%; and the total content of high-temperature-resistant mineral powder components of the glass powder is not less than 40%. The use of special glass powder does not require the addition of a porcelain skeleton, and boron oxide and phosphorus oxide melt and flow at high temperature to play a fluxing role, and the high-temperature-resistant mineral powder forms a carbon skeleton in the liquid phase layer; phosphorus oxide and boron oxide can react chemically to generate boron phosphate with a melting point of up to 1400°C, which plays the role of a porcelain skeleton; the composition has good carbon-forming performance, good mechanical properties and good processing performance.
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