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 silsesq

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

Example Embodiment

[0040] Example 1

[0041] Weigh 100g polyether polyol 4110, 1.0g tertiary amine catalyst, 0.02g dibutyltin dilaurate, 1g silicon-carbon bond foam stabilizer, 1g 2,4,6-tris(dimethylaminomethyl)phenol, 0.1 g water and 0.2g cyclopentane, 25g micron-sized α-trihydrate alumina, 0.05g octa(3-hydroxy-3-methylbutyldimethylsiloxy)silsesquioxane with a high-speed mixer at room temperature Mix uniformly under high speed stirring at 2500r / min. Add 20 g of dimethyl methyl phosphonate and mix well, then quickly add 120 g of polymethylene polyphenyl isocyanate, and stir and mix well at high speed at room temperature of 2500 r / min. When it is observed that the mixture is white, it is poured into a self-made mold and foamed freely. After foaming, it is cured for 48 hours and demolded to obtain a rigid polyurethane foam.

Example Embodiment

[0042] Example 2

[0043] Weigh 100g polyether polyol 4110, 1.5g tertiary amine catalyst, 0.04g dibutyltin dilaurate, 1g silicon-carbon bond foam stabilizer, 1g 2,4,6-tris(dimethylaminomethyl)phenol, 0.2 g water and 0.4g cyclopentane, 25g micron-sized alpha-trihydrate alumina, 0.06g octa(3-hydroxy-3-methylbutyldimethylsiloxy) silsesquioxane with a high-speed mixer at room temperature Mix uniformly under high speed stirring at 2500r / min. Add 25g of dimethyl methylphosphonate and mix well, then quickly add 120g of polymethylene polyphenyl isocyanate, and stir and mix well at high speed at room temperature of 2500r / min. When it is observed that the mixture is white, it is poured into a self-made mold and foamed freely. After foaming, it is cured for 48 hours and demolded to obtain a rigid polyurethane foam.

Example Embodiment

[0044] Example 3

[0045] Weigh 100g polyether polyol 4110, 1.5g tertiary amine catalyst, 0.04g dibutyltin dilaurate, 1.5g silicon-carbon bond foam stabilizer, 1.5g 2,4,6-tris(dimethylaminomethyl)phenol , 0.3g water and 0.6g cyclopentane, 25g micron α-trihydrate alumina, 0.07g octa(3-hydroxy-3-methylbutyldimethylsiloxy) silsesquioxane with high-speed mixer Mix well under high speed stirring at room temperature 2500r / min. Add 30g of dimethyl methylphosphonate and mix well, then quickly add 120g of polymethylene polyphenyl isocyanate, and stir and mix well at high speed at room temperature of 2500r / min. When it is observed that the mixture is white, it is poured into a self-made mold and foamed freely. After foaming, it is cured for 48 hours and demolded to obtain a rigid polyurethane foam.

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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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