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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AI-Extracted Technical Summary

Problems solved by technology

[0004] None of the existing research reports involve the use of reactive silsesq...

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Method used

With reference to the mensuration of standard GB/T6343 foamed plastics and rubber apparent density, GB9641 rigid foamed plastics tensile property test method, UL94 plastic material combustion test standard, GB/T3399 plastic thermal conductivity test method---protect the hot plate method , GB/T8810 The mensuration of water absorption of rigid foam plastics, carry out apparent density, tensile strength, flame-retardant level, thermal conductivity and water absorption rate 5 performance index tests to the rigid polyurethane foam plastics that above-mentioned each embodiment gains, ...

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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.

Technology Topic

Polyphenyl isocyanateChemistry +10

Image

Examples

Experimental program(6)
Effect test(1)

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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PUM

Property	Measurement	Unit
Apparent density	56.6 ~ 62.7	kg/m³
Tensile strength	400.0 ~ 570.0	kPa
Thermal conductivity	0.021	W/k/m
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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