Preparation method of fireproof building block

Abstract

The invention discloses a preparation method of a fireproof building block, and particularly relates to a fireproof material applied to the field of electric power fireproof plugging materials. Comprising the following components in parts by weight: 75-85 parts of polyether polyol, 1-5 parts of silicone oil, 1-5 parts of a catalyst, 10-25 parts of a flame retardant, 1-18 parts of a foaming agent and 2-23 parts of expansible graphite. The polyether polyol is one or a mixture of a plurality of polyether polyols such as N330, DL-400, DL-2000D, DL-2500D and the like; the silicone oil is one or a combination of more of PMX-200, OFX-0193, PMX-0245 and the like; the catalyst is one or a mixture of more of an organic tin catalyst (dibutyltin dilaurate), an organic bismuth catalyst (Bi 2010, Bi 2408 and Bi 2810), an organic titanium catalyst (tetraisopropyl phthalate) and the like, so that the fireproof module disclosed by the invention is small in density and better in shape and plugging effect; other plugging materials are not needed, and construction is convenient.

Description

Technical Field

[0001] The invention relates to a method for preparing a fireproof building block, in particular to a fireproof material applied in the field of electric power fireproof blocking materials. Background Art

[0002] In order to reduce the economic losses caused by fires in wires and cables, fireproof sealing materials came into being. Its function is to block the holes and gaps formed in various pipes, through bodies or floor slabs. When a fire occurs, it can effectively prevent the spread of flames and smoke, control the fire within a certain range, and reduce losses. The present invention aims to develop an organic fireproof building block, which is suitable for various working conditions and can be cut into various shapes for irregular holes. The fireproof building block expands when encountering fire to form a uniform and dense carbon fiber insulation layer, which absorbs heat and blocks fire, preventing flames from burning and the spread of smoke. At the same time, in a closed environment, higher requirements are placed on the smoke toxicity of fireproof blocks. Specifically, it is manifested in low smoke toxicity, fire resistance (≤ZA2), and halogen-free.

[0003] Traditional fire-blocking modules are relatively dense and heavy, which will add unnecessary load pressure to the building structure. Fire-blocking blocks are durable and lightweight, and will not add unnecessary load pressure to the building structure. In addition, fire-blocking blocks have good resilience and remodeling properties, and can replace fire-blocking modules during construction, especially suitable for small-area complex penetration blocking.

[0004] Therefore, how to carry out fire blocking in irregular and limited space locations, make the installation simple and convenient, and reduce the cost of fire blocking projects has become a current problem. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for preparing a fireproof building block, comprising the following components by weight: 75-85 parts of polyether polyol, 1-5 parts of silicone oil, 1-5 parts of catalyst, 10-25 parts of flame retardant, 1-18 parts of foaming agent, and 2-23 parts of expandable graphite; the polyether polyol is a mixture of one or more polyether polyols such as N330, DL-400, DL-2000D, and DL-2500D; the silicone oil is a combination of one or more of PMX-200, OFX-0193, and PMX-0245; the catalyst is an organic tin catalyst (dibutyltin dilaurate), an organic bismuth catalyst (Bi 2010, Bi 2408, Bi2810) and organic titanium catalyst (tetraisopropylphthalate) and other catalysts or a mixture of them; flame retardant is one or a combination of TCPP, TCEP, TDCPP and other flame retardants; foaming agent is one or a combination of water, ethylene glycol, propylene glycol and other foaming agents; expandable graphite is one or a combination of EG-100, EG-200, EG-300 and other expandable graphites; isocyanate is one or a combination of Wanhua PM-200, Deshimodu 44V20L, M20S and other isocyanates.

[0006] As a preferred embodiment of the method for preparing the fireproof block of the present invention, the specific process of the fireproof block is as follows: Preparation of component A: at room temperature, add polyether polyol, silicone oil, catalyst, flame retardant, expandable graphite and foaming agent into a reaction kettle, stir for 1h-3h, cool to room temperature to obtain component A, and fill and seal; Foaming: mix component A with isocyanate in a weight ratio of 1:1~9:1, and then react in a mold at 40±2℃ for 1~4h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0007] As a preferred scheme of the preparation method of the fireproof building block described in the present invention, wherein: the S1.A component is prepared: at room temperature, 80 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 22 parts of TCPP flame retardant, 16 parts of EG-300 expandable graphite, and 12 parts of water are added to a reaction kettle, stirred for 2 hours, cooled to room temperature to obtain component A, and filled and sealed.

[0008] S2. Foaming: Mix component A and PM-200 isocyanate in a weight ratio of 5:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0009] As a preferred scheme of the preparation method of the fireproof building block described in the present invention, wherein: the B1.A component is prepared: at room temperature, 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 23 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite, and 16 parts of water are added to a reaction kettle, stirred for 2 hours, cooled to room temperature to obtain component A, and filled and sealed.

[0010] B2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 5:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0011] As a preferred scheme of the preparation method of the fireproof building block described in the present invention, wherein: the F1.A component is prepared: at room temperature, 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite, and 16 parts of water are added to a reaction kettle, stirred for 2 hours, cooled to room temperature to obtain component A, and filled and sealed.

[0012] F2. Foaming: Mix component A and PM-200 isocyanate in a weight ratio of 3:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0013] As a preferred scheme of the preparation method of the fireproof building block described in the present invention, wherein: the P1.A component is prepared: at room temperature, 82 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 2.2 parts of Bi 2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 22 parts of EG-300 expandable graphite, and 18 parts of water are added to a reaction kettle, stirred for 2 hours, cooled to room temperature to obtain component A, and filled and sealed.

[0014] P2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 2:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0015] Beneficial effects of the present invention: 1. The density of the fireproof module is small, and the shape and blocking effect are better; 2. No need to use other sealing materials, and the construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Fireproof building block performance test results. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0018] This embodiment provides a method for preparing a fireproof block, including the following fireproof block formula, all of which are calculated in parts by weight: 75-85 parts of polyether polyol, 1-5 parts of silicone oil, 1-5 parts of catalyst, 10-25 parts of flame retardant, 1-18 parts of foaming agent, and 2-23 parts of expandable graphite.

[0019] The polyether polyol is one or a mixture of polyether polyols such as N330, DL-400, DL-2000D, DL-2500D, etc.; The silicone oil is one or a combination of PMX-200, OFX-0193, PMX-0245, etc.; The catalyst is one or a mixture of several of the following catalysts: an organic tin catalyst (dibutyltin dilaurate), an organic bismuth catalyst (Bi 2010, Bi2408, Bi 2810), and an organic titanium catalyst (tetraisopropylphthalate); The flame retardant is one or a combination of flame retardants such as TCPP, TCEP, TDCPP, etc.; The foaming agent is one or a combination of water, ethylene glycol, glycerol and the like; The expandable graphite is one or a combination of expandable graphites such as EG-100, EG-200, EG-300, etc.; The isocyanate is one or a combination of isocyanates such as Wanhua PM-200, Deshi Modu 44V20L, M20S, etc.; The specific process of the fireproof block: 1. Preparation of component A: At room temperature, add polyether polyol, silicone oil, catalyst, flame retardant, expandable graphite and foaming agent into a reaction kettle, stir for 1h-3h, cool to room temperature to obtain component A, and fill and seal.

[0020] 2. Foaming: Mix component A and isocyanate in a weight ratio of 1:1 to 9:1, and then react in a mold at 40±2℃ for 1 to 4 hours; cool to room temperature, disassemble the mold, and take out the fireproof block. Example 2

[0021] This embodiment provides a method for preparing a fireproof block, comprising: S1. Preparation of component A: At room temperature, add 80 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 1.6 parts of Bi2010 organic bismuth catalyst, 22 parts of TCPP flame retardant, 16 parts of EG-300 expandable graphite, and 12 parts of water into a reactor, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal.

[0022] S2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 5:1. Then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold and take out the fireproof block. Example 3

[0023] This embodiment provides a method for preparing a fireproof block, comprising: B1. Preparation of component A: At room temperature, add 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi2010 organic bismuth catalyst, 23 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite and 16 parts of water into a reactor, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal.

[0024] B2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 5:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block. Example 4

[0025] This embodiment provides a method for preparing a fireproof block, comprising: F1. Preparation of component A: At room temperature, add 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite and 16 parts of water into a reactor, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal.

[0026] F2. Foaming: Mix component A and PM-200 isocyanate in a weight ratio of 3:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

[0027] Example 5 This embodiment provides a method for preparing a fireproof block, comprising: P1. Preparation of component A: At room temperature, add 82 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 2.2 parts of Bi2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 22 parts of EG-300 expandable graphite, and 18 parts of water into a reactor, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal.

[0028] P2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 2:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block. Comparative Example 1

[0029] Comparative Example 1 refers to the preparation process of Example 2, except that no water is added in step (1). Comparative Example 2

[0030] Comparative Example 2 refers to the preparation process of Example 3, except that no EG-300 expandable graphite is added in step (1).

Claims

1. A method for preparing a fireproof block, comprising the following components by weight: 75-85 parts of polyether polyol, 1-5 parts of silicone oil, 1-5 parts of catalyst, 10-25 parts of flame retardant, 1-18 parts of foaming agent, and 2-23 parts of expandable graphite; characterized in that: The polyether polyol is a mixture of one or more polyether polyols such as N330, DL-400, DL-2000D, and DL-2500D; the silicone oil is a combination of one or more of PMX-200, OFX-0193, and PMX-0245; the catalyst is a mixture of one or more of organic tin catalysts (dibutyltin dilaurate), organic bismuth catalysts (Bi 2010, Bi 2408, and Bi 2810), and organic titanium catalysts (tetraisopropylphthalate); the flame retardant is a combination of one or more flame retardants such as TCPP, TCEP, and TDCPP; the foaming agent is a combination of one or more foaming agents such as water, ethylene glycol, and glycerol; the expandable graphite is a combination of one or more expandable graphites such as EG-100, EG-200, and EG-300; the isocyanate is Wanhua PM-200, One or a combination of isocyanates such as Desmod 44V20L, M20S, etc.; The specific process of the fireproof block: Preparation of component A: Add polyether polyol, silicone oil, catalyst, flame retardant, expandable graphite and foaming agent into the reaction kettle at room temperature, stir for 1h-3h, cool to room temperature to obtain component A, and fill and seal. Foaming: Mix component A with isocyanate in a weight ratio of 1:1-9:1, and then react in a mold at 40±2℃ for 1-4h; cool to room temperature, disassemble the mold, and take out the fireproof block.

2. The method for preparing a fireproof block according to claim 1, characterized in that: Preparation of the S1.A component: at room temperature, add 80 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 22 parts of TCPP flame retardant, 16 parts of EG-300 expandable graphite, and 12 parts of water into a reaction kettle, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal; S2. Foaming: Mix component A and PM-200 isocyanate in a weight ratio of 5:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

3. The method for preparing a fireproof block according to claim 1, characterized in that: Preparation of the B1.A component: at room temperature, add 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 23 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite, and 16 parts of water into a reaction kettle, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal; B2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 5:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

4. The method for preparing a fireproof block according to claim 1, characterized in that: Preparation of the F1.A component: at room temperature, add 78 parts of N330 polyether polyol, 2.2 parts of PMX-200 silicone oil, 1.6 parts of Bi 2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 18 parts of EG-300 expandable graphite, and 16 parts of water into a reaction kettle, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal; F2. Foaming: Mix component A and PM-200 isocyanate in a weight ratio of 3:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

5. The method for preparing a fireproof block according to claim 1, characterized in that: Preparation of the P1.A component: at room temperature, add 82 parts of N330 polyether polyol, 2.4 parts of PMX-200 silicone oil, 2.2 parts of Bi 2010 organic bismuth catalyst, 25 parts of TCPP flame retardant, 22 parts of EG-300 expandable graphite, and 18 parts of water into a reaction kettle, stir for 2 hours, cool to room temperature to obtain component A, and fill and seal; P2. Foaming: Mix component A with PM-200 isocyanate in a weight ratio of 2:1, and then react in a mold at 40±2℃ for 2h; cool to room temperature, disassemble the mold, and take out the fireproof block.

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