Nano-particle fire retardant modified rigid polyurethane PIR (Polyisocyanurate) foam material and preparation method thereof

A technology of rigid polyurethane and nanoparticles, which is applied in the field of flame-retardant rigid polyurethane modified PIR foam material and its preparation, and in the field of nanoparticle flame retardant modified rigid polyurethane PIR foam material and its preparation, which can solve the problem of smoke generation Large, weakened flame retardant effect, small molecular weight and other problems, to achieve the effect of improved heat resistance, good flame retardant effect, and fast carbonization speed

Active Publication Date: 2014-05-14
BEIJING ACAD OF BUILDING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphorus-based flame retardants have obvious flame-retardant effects and good compatibility with polyether polyols, and are widely used in the PU/PIR foam industry, but their relative molecular weight is small, the dosage is large, and they have plasticizing effects. There is migration within the ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Embodiment 1: a kind of nano particle flame retardant modified rigid polyurethane PIR foam material, after accurately weighing 2.5 parts (mass fraction) black material (coarse MDI) and 1.0 part (weight fraction) white material, pour into Put it in a different container for later use, add the flame retardant weighing 15% (mass percentage) of the white material into the white material to form a modified white material, then pour the black material into the modified white material and mix evenly, add The catalyst was stirred until the foaming reaction started for 9 seconds, and then injected into the mold immediately. After chemical reaction and foaming, the polyurethane-modified PIR foam material was obtained. Finally, after aging for 4 hours at 60-70°C, the flame-retardant performance test was carried out. The flame retardant is nano sodium bicarbonate.

Example Embodiment

[0019] Embodiment 2: A kind of nano particle fire retardant modified rigid polyurethane PIR foam material, after accurately weighing 2.5 parts (weight share) black material and 1 part white material, pour into different containers for standby, weighing accounts for Add 20% (mass percentage) of flame retardant to the white material to form a modified white material, then pour the black material into the modified white material and mix evenly, stir until the foaming reaction starts for 9 seconds, and then inject it into the mold immediately After chemical reaction and foaming, the polyurethane-modified PIR foam material is obtained, and finally the flame-retardant performance test is carried out after aging at 20-70°C for a certain period of time, and the flame-retardant agent is nano-magnesium carbonate.

Example Embodiment

[0020] Embodiment 3: A kind of nano particle flame retardant modified rigid polyurethane PIR foam material, after accurately weighing 2.5 parts (weight share) black material and 1 part white material, pour into different containers for standby, weighing accounts for Add 25% (mass percentage) of flame retardant to the white material to form a modified white material, then pour the black material into the modified white material and mix evenly, stir until the foaming reaction starts for 9 seconds, and then inject it into the mold immediately After chemical reaction and foaming, the polyurethane-modified PIR foam material is obtained, and finally the flame-retardant performance test is carried out after aging at 20-70°C for a certain period of time, and the flame-retardant agent is nano-calcium carbonate.

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PUM

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Abstract

The invention provides a nano-particle fiber retardant modified rigid polyurethane PIR (Polyisocyanurate) foam material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing 20 to 70 parts of polyether polyol, 30 to 80 parts of polyester polyol, 2 to 6 parts of foam stabilizer, 1.8 to 7.5 parts of catalyst, 20 to 40 parts of foaming agent, 8 to 15 parts of dimethyl methylphosphonate, nano-particle fiber retardant, and excess polyaryl polymethylene isocyanate; agitating at speed of 2,000 revolutions per minute; quickly pouring into a die within 9 seconds after agitating; and chemically reacting and foaming to obtain the rigid PIR polyurethane foam material, wherein the flame retardant test is carried out after curing for a certain period of time under a temperature of 20 to 70 DEG C. According to the nano-particle fiber retardant modified rigid polyurethane PIR foam material and the preparation method thereof, nano-particles used as the fire retardant of the rigid polyurethane modified PIR foam material can be integrated with the polyurethane foam material, which mainly solves the technical problem that the flame retardation of the foam material is reduced or lost after the fire retardant migrates for a long time. The process has the advantages of being simple in foaming operation, high in heat stability, extremely low in smoke output, small in toxicity, and fast in carbon production, and the nano-particle fiber retardant modified rigid polyurethane PIR foam material is an environment-friendly thermal insulation material.

Description

technical field [0001] The invention relates to a flame-retardant rigid polyurethane modified PIR foam material and a preparation method thereof, in particular to a nano-particle flame retardant modified rigid polyurethane PIR foam material and a preparation method thereof, belonging to the manufacturing and application technology of building insulation materials field. Background technique [0002] PIR (polyisocyanurate) foam material itself has good heat resistance, flame retardancy, and excellent dimensional stability, but the material is brittle and has no use value. Polyurethane is often used to chemically modify PIR materials, and the modified PIR foam materials obtained have excellent physical properties, excellent heat resistance, and flame retardancy can reach B2 level (GB8624), and the energy-saving effect of building maintenance structural insulation materials is remarkable. In recent years, many fires in China were caused by polyurethane foam materials and cause...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08K3/26C08G18/76C08G18/48C08G18/42C08J9/14C08G101/00
Inventor 王万金贺奎邹美帅朱宁吴敬朋夏义兵袁振杨辉董全霄杨荣杰何吉宇
Owner BEIJING ACAD OF BUILDING ENG
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