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Flame-retardant polyurethane rigid foam plastic and preparation method and application thereof

A rigid foam plastic and polyurethane technology, applied in the field of polymer materials, can solve the problems of insufficient flame retardant effect, poor comprehensive performance, and great harm to human body, and achieve the effects of uniform cells, good mechanical properties, and excellent comprehensive performance.

Inactive Publication Date: 2016-08-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of insufficient flame retardant effect of polyurethane rigid foam plastics in the prior art, poor comprehensive performance, and greater harm to human body due to halogen flame retardancy, the present invention provides a non-halogen composite flame retardant polyurethane rigid foam plastic The preparation method thereof has a synergistic flame retardant effect, is environmentally friendly, and the prepared polyurethane rigid foam has excellent comprehensive properties

Method used

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  • Flame-retardant polyurethane rigid foam plastic and preparation method and application thereof
  • Flame-retardant polyurethane rigid foam plastic and preparation method and application thereof
  • Flame-retardant polyurethane rigid foam plastic and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Weigh the polyethylene oxide polyol, flame retardant, stannous octoate, silicone oil, n-pentane (if the foaming agent is already contained in the commercially available polyol, it can be omitted), put it into the mixing tank, stir for 5 minutes to make it Mix evenly to obtain combined polyol (material A). Weigh polymethylene polyphenyl polyisocyanate (material B) and add it to material A, stir rapidly for 20 seconds to make it evenly mixed, then pour the above reaction solution into a mold for foaming, and mature at room temperature for 20 hours to obtain flame-retardant polyurethane Rigid foam. The LOI value is 30.

[0049] Among them, the flame retardant is: 40 parts of ammonium polyphosphate, 25 parts of coated red phosphorus.

Embodiment 2

[0051] Weigh the polypropylene oxide polyol, flame retardant, stannous octoate, silicone oil, and fluorodichloroethane (if the commercially available polyol already contains foaming agent, it can be omitted), put it into the mixing tank, and stir for 25 minutes Make it mix uniformly, obtain combination polyol (A material). Weigh polymethylene polyphenyl polyisocyanate (material B) and add it to material A, stir rapidly for 35 seconds to make it evenly mixed, then pour the above reaction solution into a mold for foaming, and mature at room temperature for 20 hours to obtain flame-retardant polyurethane Rigid foam. The LOI value is 32.

[0052] Wherein the flame retardant is: 10 parts of hollow glass microspheres, 25 parts of coated red phosphorus.

Embodiment 3

[0054] Weigh polyhexamethylene adipate diol, flame retardant, stannous octoate, silicone oil, fluorodichloroethane (if the commercially available polyol already contains foaming agent, do not need to add it), put it into the mixing tank , and stirred for 5 minutes to make it evenly mixed to obtain a combined polyol (material A). Weigh polymethylene polyphenyl polyisocyanate (B material). The materials A and B were sprayed with spraying equipment, and cured at room temperature for 18 hours to obtain a flame-retardant polyurethane rigid foam material. The LOI value is 32.

[0055] Among them, the flame retardant is: 15 parts of phenyl phosphite, 35 parts of coated red phosphorus.

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Abstract

The invention provides flame-retardant polyurethane rigid foam plastic. The plastic is prepared from, by weight, 100 parts of polyhydric alcohol, 98-130 parts of polyisocyanates, 5-100 parts of flame retardant, 0.01-5 parts of a catalyst, 0.001-5 parts of a foaming agent and 0.5-10 parts of silicone oil. The invention further provides a preparation method of the flame-retardant polyurethane rigid foam plastic. The preparation method comprises the steps of mixing polyhydric alcohol, flame retardant, the catalyst, the foaming agent and silicone oil, adding polyisocyanates, and conducting stirring, foaming and curing, or directly conducting spraying through spraying equipment, so that the flame-retardant polyurethane rigid foam plastic is obtained. The limit oxygen index (LOI) of the flame-retardant polyurethane rigid foam plastic prepared through the preparation method reaches 30 or above. The flame-retardant polyurethane rigid foam plastic is uniform in foam pore and good in mechanical performance, made of the non-halogen flame retardant, is environmentally friendly and widely applied to the fields of building heat preservation and insulation materials, petrochemical engineering storage tanks, pipe heat preservation, refrigeration houses and the like.

Description

technical field [0001] The invention relates to a flame-retardant polyurethane rigid foam and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Rigid polyurethane foam has the characteristics of oil resistance, heat resistance, corrosion resistance, excellent mechanical properties, heat insulation and sound absorption, and is widely used in various fields such as building insulation, petrochemical industry, transportation, cold storage, packaging and national defense. However, the limiting oxygen index of pure rigid polyurethane foam is about 17, and toxic substances such as carbon monoxide and hydrogen cyanide are released during combustion, which limits its application. In recent years, fires have occurred frequently in urban buildings in various parts of my country, and people's lives and property have been seriously lost. Therefore, higher requirements for the flame retardancy of building materials have bee...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08G18/44C08K13/06C08K9/10C08K3/02C08K3/32C08K5/526C08K5/5333C08K7/24C08K7/28C08K3/22C08J9/14C08J9/12C08J9/08C08L75/04C08L75/06C08L75/08C08G101/00
Inventor 朱秀玲井健王瑞陈孟孟金翠红
Owner DALIAN UNIV OF TECH
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