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Flame retardant phenolic resin foamed sandwiching material and its preparation

A technology of phenolic foam and sandwich materials, applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of insufficient flame retardancy of foam, failure to meet non-combustible A-level standards, etc., and achieve inhibition Smoke generation and hydrogen halide generation, reduced energy consumption, excellent thermal insulation effect

Inactive Publication Date: 2005-05-11
厦门高特高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US 4,419, No. 460 patent uses hydrated alumina to improve the closed cell ratio of phenolic foam, and its addition is 2%-15%, more preferably 5%-10%. Practice has proved that the flame retardancy of the resulting foam is not ideal enough to reach To non-combustible Class A standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The non-combustible phenolic foam sandwich material consists of 5 layers, the surface layer is aluminum foil, the core layer is phenolic foam, and the bonding layer is between the surface layer and the core layer. Embossed aluminum foil is selected as the surface layer aluminum foil, and the surface of the aluminum foil has an anti-corrosion coating.

[0038] The components of the core layer phenolic foam and the content by weight are: expandable phenolic resin 100, surfactant "Tween 80" 3, flame retardant 100 aluminum hydroxide and magnesium hydroxide 20, blowing agent Petroleum ether 8 is selected, phosphoric acid 3 and benzenesulfonic acid 5 are selected as curing agent.

[0039] The molar ratio of phenol to formaldehyde in the expandable phenolic resin is 1:1.6, and the viscosity at room temperature is 12000cp. After the mixture was stirred evenly, it was foamed and solidified at 70°C. The density of phenolic foam is 100kg / m 3 .

[0040] The process steps are: ...

Embodiment 2

[0049] The non-combustible phenolic foam sandwich material consists of 5 layers, the surface layer is aluminum foil fiber cloth, the core layer is phenolic foam, and the bonding layer is between the surface layer and the core layer. Embossed aluminum foil is selected as the surface layer aluminum foil, and the surface of the aluminum foil has an anti-corrosion coating.

[0050] The components of the core layer phenolic foam and the content by weight are: expandable phenolic resin 100, surfactant "Tween 80" 2.5, flame retardant 150 magnesium hydroxide and hollow microspheres 30, blowing agent Select pentane 6, and the curing agent selects boric acid 6, benzenesulfonic acid 4 and p-toluenesulfonic acid 5.

[0051] The molar ratio of phenol to formaldehyde in the expandable phenolic resin is 1:2.0, and the viscosity at room temperature is 10000cp. After the mixture is stirred evenly, it is foamed and solidified at 75°C.

[0052] The density of said phenolic foam is 150kg / m 3 ....

Embodiment 3

[0063] The non-combustible phenolic foam sandwich material is the same as in Example 1.

[0064] The components of the core layer phenolic foam and the content by weight are: expandable phenolic resin 100, surfactant "EL-40" 2.5, flame retardant aluminum hydroxide 100 and hollow microspheres 150, blowing agent Hexane 3 is selected, phosphoric acid 4, boric acid 6 and xylenesulfonic acid 7 are selected as the curing agent. The molar ratio of phenol to formaldehyde in the expandable phenolic resin is 1:2.5, and the viscosity at room temperature is 5000cp. After the mixture was stirred evenly, it was foamed and solidified at 65°C. The density of said phenolic foam is 200kg / m 3 .

[0065] The process steps are:

[0066] 1. Synthesis of expandable phenolic resin:

[0067] The molar ratio of phenol and formaldehyde is 1: 2.5, with alkali as catalyst (pH=9), react at 70 ℃ for 4 hours, and the reaction process uses the refractive index (n D ) to track, when the refractive index ...

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Abstract

An incombustible sandwiched material for the thermal insulation of wall, ceiling, ship, chemical container, pipeline, etc is composed of 5 layers including surficial aluminium foil layers or aluminium foil-fibre cloth layers and sandwich layers for phenolic foam. Its preparing process includes such steps as synthesizing the foaming phenolic resin, preparing phenolic foam, mixing foaming phenolic resin, surfactant and flame retardant, adding foaming agent and solidifying agent, foaming solidifying, making the sandwich material, surface treating, coating, cutting, adhering, drying and trimming.

Description

(1) Technical field [0001] The invention relates to a non-combustible grade A phenolic foam composite sandwich material and a preparation method thereof. (2) Background technology [0002] Phenolic foam sandwich materials have been widely used in building air-conditioning insulation pipes due to their low thermal conductivity, good fire resistance, less smoke when burning, non-toxic, low water absorption, and fluorine-free foaming. However, it is no longer suitable for occasions that require higher fire performance, such as high-end hotels, high-rise buildings, ships, and warships. [0003] CN 02108279 patent application discloses an aluminum foil-phenolic foam sandwich composite board and its production process, which uses less flame retardant, and the flame retardant effect is not obvious, and the produced aluminum foil-phenolic foam sandwich composite board can only Reach flame retardant B1 level. US 4,681,902 patent mixes halogenated diphenyl ether (70% W / W) and organo...

Claims

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Application Information

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IPC IPC(8): B32B3/22B32B15/08B32B15/14
Inventor 汪坤明林志祥江积旺
Owner 厦门高特高新材料有限公司
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