Phosphogypsum-based heat-insulation fireproof coating and preparation method thereof

Through the synergy between titanium dioxide modified phosphogypsum and modified composite flame retardant fibers, combined with ultrasonic assisted preparation technology, the problem of insufficient fire resistance and prone to cracking of the phosphogypsum-based heat-resistant fire coating is solved, and efficient fire insulation performance and structural stability are achieved.

CN120504987APending Publication Date: 2025-08-19GUIZHOU LINGXING NEW MATERIALS TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510871651.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

The existing phosphogypsum-based heat-resistant fire-retardant coatings have shortcomings in fire resistance. The flame retardant lacks a variety of synergistic mechanisms, making it difficult to quickly form an effective expansion insulation layer, and cannot block heat conduction and flame spread for a long time. At the same time, the coating is prone to cracking and peeling.

Method used

Titanium dioxide modified phosphogypsum and modified composite flame retardant fibers are used to work synergistically, combined with ultrasonic assisted preparation technology to form a double insulation barrier, and toughen it through calcium sulfate whiskers to improve interface binding force. The preparation method includes ultrasonic dispersion, silane coupling agent activation and tetrabutyl titanate hydrolysis to form a rutile-type titanium dioxide load, and the carbon source fiber is impregnated by melamine-ammonium polyphosphate mixed solution to form an expanded flame retardant system.

Benefits of technology

It significantly improves the fire-retardant and thermal insulation performance and structural stability of the coating, forms a dense carbonized layer to isolate flame and heat, improves the overall stability and durability of the coating, and enhances the flame-retardant efficiency and mechanical stability of the coating.

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Abstract

The invention relates to the technical field of coating compositions, and particularly discloses an ardealite-based heat-insulation fireproof coating and a preparation method thereof.The ardealite-based heat-insulation fireproof coating is prepared from titanium dioxide modified ardealite, hollow glass beads, styrene-acrylic emulsion, modified composite flame-retardant fibers, calcium sulfate whiskers, microencapsulated red phosphorus, redispersible latex powder, deionized water, a dispersing agent and a defoaming agent; the preparation method comprises the following steps: firstly, preparing titanium dioxide modified phosphogypsum, secondly, modifying the composite flame-retardant fiber, and finally, mixing and stirring all the components. Through the synergistic effect of the titanium dioxide modified phosphogypsum and the composite flame-retardant fiber and in combination with an ultrasonic-assisted preparation process, a double heat-insulating barrier and a synergistic flame-retardant mechanism is formed; and calcium sulfate whiskers are matched for toughening, so that the fireproof heat-insulating performance and the structural stability of the coating are improved, and the problem that the coating is easy to crack is solved.
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