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Halogen-free and flame-retardant hard polyurethane foam plastic and preparation method thereof

A technology of rigid polyurethane and foamed plastics, which is applied in the field of foamed plastics, can solve problems not related to the flame retardancy of rigid polyurethane foamed plastics, and achieve the effects of good flame retardancy, excellent heat preservation and wide application range of phosphorus, nitrogen and silicon synergistically

Active Publication Date: 2012-07-18
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] None of the existing research reports involve the use of reactive silsesquioxane as a modifier to improve the flame retardancy of rigid polyurethane foam

Method used

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  • Halogen-free and flame-retardant hard polyurethane foam plastic and preparation method thereof
  • Halogen-free and flame-retardant hard polyurethane foam plastic and preparation method thereof
  • Halogen-free and flame-retardant hard polyurethane foam plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 100g polyether polyol 4110, 1.0g tertiary amine catalyst and 0.02g dibutyltin dilaurate, 1g silicon-carbon bond type foam stabilizer, 1g2,4,6-tris(dimethylaminomethyl)phenol, 0.1 g water and 0.2g cyclopentane, 25g micron grade α-alumina trihydrate, 0.05g octa(3-hydroxy-3-methylbutyldimethylsiloxy)silsesquioxane with a high-speed stirrer at room temperature Mix evenly under 2500r / min high-speed stirring. Add 20g of dimethyl methylphosphonate and mix evenly, then quickly add 120g of polymethylene polyphenylisocyanate, stir at room temperature at 2500r / min at high speed and mix evenly. When the mixture is observed to be whitish, it is poured into a self-made mold to foam freely, after foaming, it is aged for 48 hours, and the rigid polyurethane foam is obtained after demoulding.

Embodiment 2

[0043]Weigh 100g polyether polyol 4110, 1.5g tertiary amine catalyst and 0.04g dibutyltin dilaurate, 1g silicon-carbon bond type foam stabilizer, 1g2,4,6-tris(dimethylaminomethyl)phenol, 0.2 g water and 0.4 g cyclopentane, 25 g micron-sized α-alumina trihydrate, 0.06 g octa(3-hydroxy-3-methylbutyldimethylsiloxy) silsesquioxane with a high-speed stirrer at room temperature Mix evenly under 2500r / min high-speed stirring. Add 25g of dimethyl methylphosphonate and mix evenly, then quickly add 120g of polymethylene polyphenylisocyanate, stir at room temperature at 2500r / min at a high speed and mix evenly. When the mixture is observed to be whitish, it is poured into a self-made mold to foam freely, after foaming, it is aged for 48 hours, and the rigid polyurethane foam is obtained after demoulding.

Embodiment 3

[0045] Weigh 100g polyether polyol 4110, 1.5g tertiary amine catalyst and 0.04g dibutyltin dilaurate, 1.5g silicon-carbon bond type foam stabilizer, 1.5g2,4,6-tris(dimethylaminomethyl)phenol , 0.3g water and 0.6g cyclopentane, 25g micron grade α-alumina trihydrate, 0.07g octa(3-hydroxy-3-methylbutyldimethylsiloxy)silsesquioxane with a high-speed mixer Mix evenly under 2500r / min high-speed stirring at room temperature. Add 30g of dimethyl methylphosphonate and mix evenly, then quickly add 120g of polymethylene polyphenylisocyanate, stir at room temperature at 2500r / min at high speed and mix evenly. When the mixture is observed to be whitish, it is poured into a self-made mold to foam freely, after foaming, it is aged for 48 hours, and the rigid polyurethane foam is obtained after demoulding.

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Abstract

The invention discloses halogen-free and flame-retardant hard polyurethane foam plastic and a preparation method thereof, relating to foam plastic. Raw materials include polyether polyol 4110, polymethylene polyphenyl isocyanate, a tertiary amine catalyst, dibutyltin dilaurate, a silicon-carbon bond foam stabilizer, 2,4,6-tri(dimethylaminomethyl)phenol, a foaming agent, octa-(3-hydroxyl-3-methyl butyl dimethylsiloxy)silsesquioxane, dimethyl methylphosphonate and micron-sized alpha-alumina trihydrate. The method comprises the following steps of: mixing the polyether polyol 4110, tertiary aminecatalyst, dibutyltin dilaurate, silicon-carbon bond foam stabilizer, 2,4,6-tri(dimethylaminomethyl)phenol, foaming agent, octa-(3-hydroxyl-3-methyl butyl dimethylsiloxy)silsesquioxane and micron-sized alpha-alumina trihydrate to obtain A; adding the dimethyl methylphosphonate into A to obtain B; and adding the polymethylene polyphenyl isocyanate into B, pouring into a mold for foaming, curing anddemolding to obtain the halogen-free and flame-retardant hard polyurethane foam plastic.

Description

technical field [0001] The invention relates to a foam plastic, in particular to a preparation method of a halogen-free flame-retardant rigid polyurethane foam. Background technique [0002] Compared with extruded board and benzene board, rigid polyurethane foam has better thermal insulation effect, cold and heat resistance, lower water absorption and longer service life, but it is a flammable organic polymer material . Its limiting oxygen index is around 17, its own thermal conductivity is low, the flame propagation rate is fast when it catches fire, its flame retardancy is poor, and it will produce a lot of smoke when it burns. The recent frequent fire accidents in various regions, such as the CCTV building fire, Shenzhen Longgang fire and Shanghai Jing'an District teachers' apartment building fire and other painful lessons show that effectively improving the fire and flame retardancy of polyurethane foam plays a role in ensuring the safety of people's lives and property....

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K13/02C08K5/5333C08K3/22C08J9/14C08J9/08C08L75/08C08G101/00
Inventor 戴李宗刘李曾福泉许一婷罗伟昂谢聪许延利张龙潘尹银曾碧榕
Owner XIAMEN UNIV
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