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

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...

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 material, so its flame retardant effect will weaken with time, affecting the overall safety of the material

Phosphorus-halogen composite flame retardant has excellent flame retardant effect, but it has a large amount of smoke and high toxicity. Once a fire occurs, it will be more harmful to the human body.