Waterproof silica aerogel polyurethane composite insulating wallboard and preparation method thereof

Abstract

The invention discloses a waterproof silica aerogel polyurethane composite insulating wallboard, prepared from the following raw materials in parts by weight: 1.5-1.8 of naphtha, 2.5-2.8 of naphthenic acid, 4-5 of nano polytetrafluoroethylene micropowder, 3.5-4 of succinylated monoglycerides, 100-105 of porous ceramic balls, 100 of water glass, a proper amount of Span-80, a proper amount of Tween-80, a proper amount of 1mol / L ammonia water, a proper amount of acetone, a proper amount of ethyl alcohol, 90-94 of polyether glycol DSU-365, 0.5-0.54 of triethanolamine, 15-16 of water, 0.75-0.9 of dibutyltin dilaurate and 100-110 of polymethylene polyphenyl polyisocyanate. The invention improves the water resistance and tensile strength of polyurethane foam through the use of naphtha, naphthenic acid, nano polytetrafluoroethylene micropowder and succinylated monoglycerides.

Description

technical field [0001] The invention relates to the technical field of thermal insulation wall panels, in particular to a water-resistant silica airgel polyurethane composite thermal insulation wall panel and a preparation method thereof. Background technique [0002] Polystyrene board is a common building insulation material. It has low density, good mechanical strength, corrosion resistance, waterproof, and easy division and construction, but its thermal conductivity is relatively high (k≈0.042W / m·K). The nanoporous structure of silica airgel and its ultra-light, super-insulation, strong ultraviolet absorption, infrared reflection and other characteristics greatly limit the heat conduction and heat convection in the heat transfer process. SiO 2 The airgel / polystyrene composite structure can further reduce the thermal conductivity of the EPS insulation board, and improve the flame retardancy of the EPS insulation board without affecting the mechanical properties of the EP...

AI Technical Summary

Problems solved by technology

[0003] However, the insulating material obtained by this method is due to SiO 2 Airgel is easily broken and the thermal insulation performance cannot be sustained and stable

At the same time, the toughness, heat resistance, water resistance, heat generation, antistatic, mildew resistance, antibacterial, strength, resilience, aging resistance and corrosion resistance of the insulation material need to be improved.

Polyurethane foam has excellent insulation properties, but not as good as SiO 2 Airgel has good thermal insulation, but poor flame retardancy

[0004] The article "Preparation of Full Water Foamed Polyurethane Rigid Foam and Its Flame Retardant Properties" prepared a polyurethane foam with excellent flame retardant and mechanical properties, but the thermal insulation performance still cannot meet the needs of scientific development

[0005] If SiO 2 The combination of airgel and polyurethane foam can improve the thermal insulation and flame retardancy of polyurethane foam, but direct compounding, SiO 2 Airgel is easy to break, and the insulation effect is easy to disappear, which needs further improvement