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Fireproof and flame-retardant coating based on microencapsulation technology and preparation method of fireproof and flame-retardant coating

A technology of fire-resistant and flame-retardant coatings and microencapsulation, applied in fire-resistant coatings, epoxy resin coatings, coatings, etc., can solve the problems of reducing heat conduction, single structure and function of fire-resistant coatings, and limited fire resistance, and achieve physical and mechanical properties. Improvement, easy repair and maintenance, compatible and uniform effect

Pending Publication Date: 2019-06-11
JIANGSU CHAMPION TECHNOLOGY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing fire retardant coating has a single structure and function, can only form a partition on the surface, and avoid direct heat conduction with the substrate, but its fire resistance is limited, it cannot fall off at high temperature by itself, and prevent the fire from spreading. The purpose of the present invention is to Provide a fire-resistant and flame-retardant coating based on microencapsulation technology and its preparation method, which can microencapsulate the flame retardant so that it can be ceramicized after being packaged at high temperature, and combined with the internal flame retardant At the same time, the internal foaming agent foams and expands at high temperature, forming a cavity between it and the substrate, reducing heat conduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A fire retardant coating based on microencapsulation technology, comprising a base material and a filler, the base material comprising the following components in parts by mass: 50 parts of epoxy resin, 50 parts of nano-silica modified epoxy resin, 30 parts of microencapsulated flame retardant and 12 parts of foaming agent; the filler includes the following components in parts by mass: 5 parts of wollastonite, 6.5 parts of glass fiber, 3.5 parts of mica, 8 parts of aluminum hydroxide, titanium dioxide 3.5 parts, 2.5 parts of silicon release agent, 7 parts of dispersant and 4 parts of pyrophyllite powder. There is a microencapsulated flame retardant in the base material. After microencapsulation, the flame retardant is more stable, and the compatibility between the flame retardant and the epoxy resin is more uniform, which improves the reduction of the physical and mechanical properties of the material; There is nano-silica modified epoxy resin, under high temperature en...

Embodiment 2

[0050] Compared with Example 1, the difference of Example 2 is the change of component selection, and the preparation process of the microencapsulated flame retardant includes the following steps:

[0051] a. Mix ammonium polyphosphate and aluminum hydroxide in a mass ratio of 1.5:2 to prepare a halogen-free flame retardant. Take 5.3g of the halogen-free flame retardant and disperse it evenly in 65mL of acetone, and then transfer it to a In a four-neck flask with mechanical stirring and condenser, the stirring speed is 400r / min±50r / min and heated to 55°C±5°C, dropwise add 15mL of acetone solution containing 0.3g of hydrogenated diphenylmethane diisocyanate, After the dropwise addition, gradually add 0.03 g of dicyandiamide to the system, and continue the reaction for 8.5 hours, then stop heating and stirring;

[0052] b. Vacuum suction filtration, wash twice with acetone, then rinse twice with slightly hot distilled water, collect the filter cake, and dry it in a constant temp...

Embodiment 3

[0058] Compared with Example 1, the difference of Example 3 is the change of component selection, and the specific preparation steps of preparing microencapsulated flame retardant in the S2 step are as follows:

[0059] a. Mix ammonium phosphate and ferric hydroxide in a mass ratio of 3:2 to prepare a halogen-free flame retardant. Take 5.3g of the halogen-free flame retardant and evenly disperse it in 65mL of xylene, and then transfer it to a In a four-neck flask with mechanical stirring and condenser, the stirring speed is 400r / min±50r / min and heated to 55°C±5°C, dropwise add 15mL of xylene solution containing 0.3g hydrogenated diphenylmethane diisocyanate , after the dropwise addition, gradually add 0.03g of dicyandiamide to the system, continue to react for 8.5 hours, stop heating and stirring;

[0060] b. Vacuum suction filtration, wash twice with xylene, then rinse twice with slightly hot distilled water, collect the filter cake, dry in a constant temperature vacuum dryin...

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Abstract

The invention provides a fireproof and flame-retardant coating based on a microencapsulation technology and a preparation method of the fireproof and flame-retardant coating. The fireproof and flame-retardant coating comprises a base material and filler; the base material comprises the following components in parts by mass: 40-60 parts of epoxy resin, 40-60 parts of nanometer silicon dioxide modified epoxy resin, 20-50 parts of microencapsulated flame retardant and 10-15 parts of foaming agent; and the filler comprises the following components in parts by mass: 4-6 parts of wollastonite, 5-8 parts of glass fibers, 2-5 parts of mica, 7-9 parts of aluminum hydroxide, 2-5 parts of titanium dioxide, 2-3 parts of silicon parting agent, 5-8 parts of dispersant and 2-6 parts of pyrophyllite powder. The fireproof and flame-retardant coating has the advantages that the flame retardant is microencapsulated, so that ceramization can be realized after wrapping at high temperature, the flame retardant inside the coating is combined for flame retardance, and meanwhile, the foaming agent inside the coating is foamed at high temperature to swell, so that a cavity is formed between the coating anda matrix, and then, heat conduction is reduced.

Description

technical field [0001] The invention relates to a fire-proof and flame-retardant coating based on microencapsulation technology and a preparation method thereof. Background technique [0002] Epoxy resin has excellent bonding properties, mechanical properties, corrosion resistance and heat resistance. It can be used as coatings, adhesives and molding materials, and is widely used in aerospace, electronic and electrical, engineering technology, civil engineering and stationery. Among them, the application of coatings ranks first, such as: automobile body primer, bridge anti-corrosion coating, cement water tank lining, floor lining coating, ship warehouse interior coating, etc. However, the flammability of epoxy resin has also brought great hidden dangers to people's life and property safety, so the preparation of fireproof epoxy resin coatings plays a vital role in the development of the national economy. [0003] Flame retardancy refers to the characteristic that the flame ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/18C09D7/61C09D7/65
Inventor 胡明谢海戴国绪
Owner JIANGSU CHAMPION TECHNOLOGY GROUP CO LTD
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