A method for preparing a material having a flame quenching function

Abstract

The application discloses a preparation method of a material with a flame-out function, and relates to the technical field of new materials, and specifically comprises the following steps: preparing the following raw materials: modified unsaturated polyester resin, flame-out capsules, an initiator, color paste, a release agent and filling material; mixing the raw materials in a high-shear mixer to obtain a resin paste; adding the resin paste into a mixer to which glass fibers have been added, and mixing for 6-8 minutes; discharging the BMC material; weighing the BMC material, and placing the BMC material into a preheated mold cavity; keeping a mold pressing pressure of 8-15 MPa after completely closing the mold; discharging pressure and opening the mold; and taking out the formed product. The flame-out capsules are added in the base material and are completely covered by the base material resin, the flame-out capacity is not affected by the environment and is not lost with the coating, and the flame-out capsules have the same service life as the base material. In case of fire, the coating is not consumed to inhibit the rekindling, and the flame-out effect is better.

Description

Technical Field

[0001] This invention relates to the field of new materials technology, and in particular to a method for preparing a material with flame extinguishing function. Background Technology

[0002] In scenarios such as home renovations, public buildings, and industrial screening workshops, ordinary wood and engineered wood products without flame-retardant treatment significantly increase the fire load. Once ignited, they quickly become fuel, fueling the fire, causing flashover, and compressing the golden time for evacuation and rescue. Approximately 80% of casualties in building fires are due to the rapid spread of toxic smoke and fire. Many existing flame-retardant or fire-resistant materials can prevent the spread and development of fire accidents, slowing the burning rate and reducing the intensity of combustion, but they cannot extinguish fires in a timely manner. Alternatively, fire-extinguishing coatings can be applied to the surface of related products, but adhesion and coating aging can cause the fire-extinguishing function to fail. After a fire occurs, the coating is consumed, losing its flame-extinguishing function and failing to prevent reignition. Summary of the Invention

[0003] The technical problem this invention aims to solve is that the flame extinguishing performance of the board material is poor, the fire extinguishing coating brushed onto the surface of the board material is easily consumed, the flame extinguishing function cannot be guaranteed in the event of a fire, and the situation of reignition cannot be prevented.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] A method for preparing a material with flame extinguishing function specifically includes the following steps:

[0006] Step 1: Prepare the following raw materials according to the following weight proportions: Modified unsaturated polyester resin: 25-35 parts, glass fiber: 10-20 parts, flame extinguishing capsule: 12-30 parts, color paste: 1-2 parts, initiator: 1-2 parts, release agent: 1-2 parts, filler: 30-40 parts.

[0007] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0008] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 6-8 minutes, and then discharge to obtain BMC aggregate.

[0009] Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 8-15MPa and a mold temperature of 110℃-180℃ for 3-6 minutes.

[0010] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0011] Preferably, step 1 further includes pretreatment of the flame extinguishing capsule, specifically as follows: spray coating the flame extinguishing capsule with 0.5-1% silane coupling agent, and then drying it for later use.

[0012] Preferably, the glass fiber is chopped glass fiber, and the filler is activated calcium carbonate or aluminum hydroxide.

[0013] Preferably, in step 4, when the sheet thickness is ≤5mm, the mold temperature is controlled at 120-150℃; when the sheet thickness is 5-20mm, the mold temperature is controlled at 120-160℃; and when the sheet thickness is >20mm, the mold temperature is controlled at 120-170℃.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The flame extinguishing material provided in this application can suppress combustion from the source, delay the spread of flames, block the penetration of high-temperature smoke, effectively reduce the risk of flashover, and lock in toxic smoke, thus buying critical time for personnel escape and rescue, and reducing loss of life and property. Compared with flame retardant materials, it has the function of self-extinguishing flames and can quickly extinguish fires in the early stage of fire; compared with fire-fighting devices, it does not require additional system settings, and it is automatically triggered when fire occurs, completely solving the problems of reliability and timeliness, without misjudgment, and without pollution or damage to the on-site environment; compared with fire extinguishing coatings, this application adds flame extinguishing capsules to the base material, which are completely covered by the base material resin. The flame extinguishing effect has the same lifespan as the base material and will not fail on its own. In the event of a fire, there is no situation where the coating is consumed and the reignition cannot be suppressed. Moreover, the product containing the base material can continue to act to prevent reignition. After the fire, it does not need to be repainted and can even be used without maintenance, providing continuous protection. Attached Figure Description

[0016] Figure 1 This is a flowchart of a method for preparing a material with flame extinguishing function. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figure 1 As shown, this application discloses a method for preparing a material with flame-extinguishing function, specifically including the following steps:

[0019] Step 1: Prepare the following raw materials according to the following weight proportions: modified unsaturated polyester resin: 25-35 parts, glass fiber: 10-20 parts, flame extinguishing capsule: 12-30 parts, color paste: 1-2 parts, initiator: 1-2 parts, release agent: 1-2 parts, filler: 30-40 parts; the glass fiber in this application is chopped glass fiber, and the filler is activated calcium carbonate or aluminum hydroxide. Step 1 also includes pretreatment of the flame extinguishing capsule, specifically as follows: spray coating the flame extinguishing capsule with 0.5-1% silane coupling agent, and then drying it for later use.

[0020] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0021] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 6-8 minutes, and then discharge to obtain BMC aggregate.

[0022] Step 4: Weigh the BMC slurry obtained in Step 3 as needed, place it into the preheated mold cavity, spread the material evenly and smoothly, slowly close the mold, and maintain a molding pressure of 8-15 MPa and a mold temperature of 110℃-180℃ for 3-6 minutes after the mold is completely closed. Preferably, in Step 5, when the sheet thickness is ≤5mm: the mold temperature in Step 4 is controlled at 120-150℃; when the sheet thickness is 5-20mm: the mold temperature in Step 4 is controlled at 120-160℃; when the sheet thickness is >20mm: the mold temperature is controlled at 120-170℃.

[0023] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0024] Example 1:

[0025] Step 1: Prepare the following raw materials according to the following weight proportions: modified unsaturated polyester resin: 25 parts, glass fiber: 10 parts, flame extinguishing capsule: 12 parts, color paste: 2 parts, initiator: 1 part, release agent: 2 parts, activated calcium carbonate: 30 parts. First, spray the flame extinguishing capsule with 0.5% silane coupling agent, and then dry it for later use.

[0026] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0027] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 6 minutes, and then discharge to obtain BMC aggregate.

[0028] Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 13MPa and a mold temperature of 110℃ for 4 minutes.

[0029] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0030] Example 2:

[0031] Step 1: Prepare the following raw materials according to the following weight proportions: modified unsaturated polyester resin: 30 parts, glass fiber: 12 parts, flame extinguishing capsule: 15 parts, color paste: 2 parts, initiator: 2 parts, release agent: 2 parts, filler: 36 parts; spray the flame extinguishing capsule with 0.8% silane coupling agent, and dry it for later use.

[0032] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0033] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 6 minutes, and then discharge to obtain BMC aggregate.

[0034] Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 10MPa and a mold temperature of 150℃ for 4 minutes.

[0035] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0036] Example 3:

[0037] Step 1: Prepare the following raw materials according to the following weight proportions: modified unsaturated polyester resin: 28 parts, glass fiber: 11 parts, flame extinguishing capsule: 29 parts, color paste: 2 parts, initiator: 2 parts, release agent: 2 parts, filler: 39 parts; spray the flame extinguishing capsule with 0.85% silane coupling agent, dry it and set it aside.

[0038] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0039] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 7 minutes, and then discharge to obtain BMC aggregate.

[0040] Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 13MPa and a mold temperature of 145℃ for 3 minutes.

[0041] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0042] Example 4:

[0043] Step 1: Prepare the following raw materials according to the following weight proportions: modified unsaturated polyester resin: 35 parts, glass fiber: 20 parts, flame extinguishing capsule: 30 parts, color paste: 2 parts, initiator: 2 parts, release agent: 2 parts, filler: 40 parts; spray the flame extinguishing capsule with 1% silane coupling agent, and dry it for later use.

[0044] Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation.

[0045] Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 8 minutes, and then discharge to obtain BMC aggregate.

[0046] Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 15MPa and a mold temperature of 180℃ for 6 minutes.

[0047] Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

[0048] The principle behind flame-extinguishing materials:

[0049] When the product provided in this application encounters an open flame, the perfluorohexanone capsules within the product melt due to the ambient temperature (trigger temperature), releasing perfluorohexanone, which then vaporizes and absorbs heat, lowering the flame temperature and extinguishing the fire. Simultaneously, the generated vapor isolates the air, providing continuous fire suppression and preventing reignition. The extinguishing capsules feature a high encapsulation rate (≥90%) and high charge loading, with perfluorohexanone effectively comprising up to 70%~85% of the total charge. The particle size can be controlled between 50 and 600 micrometers, ensuring uniformity and controllability. The capsule shell thickness can also be adjusted to suit different product forms. The core extinguishing agent, perfluorohexanone, is colorless, odorless, and non-conductive, having minimal impact on global warming and a short atmospheric retention time, making it an environmentally friendly extinguishing medium. It leaves no residue after extinguishing the fire and causes no secondary damage to protected equipment (such as battery packs and distribution cabinets). Various product forms can be made using materials containing perfluorohexanone flame extinguishing capsules. These products are small in size and are particularly suitable for installation in confined spaces such as battery packs, energy storage systems, and power distribution cabinets in new energy vehicles. They do not require electricity, are automatically triggered, and avoid the risk of power failure in traditional fire protection systems.

[0050] Performance testing:

[0051] The stability and extinguishing time of the products provided in the above embodiments were tested under the same experimental environment, and the results are shown in Table 1:

[0052] Table 1

[0053]

[0054] As shown in Table 1, materials with added flame-extinguishing capsules exhibit good stability, and the more flame-extinguishing capsules added, the faster the extinguishing time. When the ambient temperature rises to the preset trigger threshold of 110℃~180℃, the microcapsule shell will rupture instantly, and the perfluorohexanone inside will extinguish the fire through a triple mechanism of vaporization heat absorption, chemical inhibition, and oxygen isolation, quickly blocking the spread of thermal runaway. It can extinguish fires efficiently and has an extremely fast response. In addition, the microcapsules are integrated into the substrate, which not only solves the problems of perfluorohexanone's low boiling point (only 49.2℃) and easy volatility, but also solves the problems of microcapsules being easily peeled off with the coating and aging when applied to the product surface. It has the same lifespan as the substrate, good stability, and safe storage.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A method for preparing a material with flame extinguishing function, characterized in that: Specifically, the following steps are included: Step 1: Prepare the following raw materials according to the following weight proportions: Modified unsaturated polyester resin: 25-35 parts, glass fiber: 10-20 parts, flame extinguishing capsule: 12-30 parts, color paste: 1-2 parts, initiator: 1-2 parts, release agent: 1-2 parts, filler: 30-40 parts. Step 2: First, add the modified unsaturated polyester resin, flame extinguishing capsule, initiator, color paste, release agent and some filler into a high shear force mixer and mix. All components must be mixed and dispersed evenly, and resin paste is obtained after there is no clumping or precipitation. Step 3: Add the resin paste obtained in Step 2 to a Σ-paddle or planetary mixer containing glass fiber, mix for 6-8 minutes, and then discharge to obtain BMC aggregate. Step 4: Weigh the BMC lumps obtained in Step 3 as needed, place them into the preheated mold cavity, spread the material evenly and flat, slowly close the mold, and after the mold is completely closed, maintain a molding pressure of 8-15MPa and a mold temperature of 110℃-180℃ for 3-6 minutes. Step 5: Release the pressure and open the mold, take out the molded product, remove the flash and burrs, and trim the edges to obtain the finished product with flame extinguishing function.

2. The method for preparing a flame-extinguishing material according to claim 1, characterized in that: Step 1 further includes pretreatment of the flame extinguishing capsules, specifically as follows: the flame extinguishing capsules are spray-coated with 0.5-1% silane coupling agent, dried, and then set aside for use.

3. The method for preparing a flame-extinguishing material according to claim 2, characterized in that: The glass fiber is chopped glass fiber, and the filler is activated calcium carbonate or aluminum hydroxide.

4. The method for preparing a flame-extinguishing material according to claim 3, characterized in that: In step 4, when the sheet thickness is ≤5mm: the mold temperature is controlled at 120-150℃; when the sheet thickness is 5-20mm: the mold temperature is controlled at 120-160℃; when the sheet thickness is >20mm: the mold temperature is controlled at 120-170℃.

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