Highly flame-resistant external wall heat preservation material and process for producing same

Abstract

The invention discloses a highly flame-resistant external wall heat preservation material and a process for producing the same, which are mainly used for the construction of isolation belts and the heat preservation of high-rise buildings and building bodies with relatively higher requirement on fire-protection rating. According to the process, the highly flame-resistant external wall heat preservation material is produced by taking modified phenol aldehyde resin with low hydroxyl content as a raw material and performing low-acid curing on the modified phenol aldehyde resin. The modified phenol aldehyde resin with the low hydroxyl content is prepared by heating phenol, formaldehyde, a modifier and chopped glass fiber firstly under an acidic condition and then under an alkali condition and then performing copolymerization and condensation on the phenol, the formaldehyde, the modifier and the chopped glass fiber. The modified phenol aldehyde resin with the low hydroxyl content, a surfactant, a gas foaming agent, a modified moisture repel and an organic acid catalytic system are cured and molded on a continuous line. The highly flame-resistant external wall heat preservation material has the following advantages that: a terminal hydroxyl group of the adopted phenol aldehyde resin is closed, so the water absorbing capacity of the material is reduced; the cured molding material has high strength and low acidity; the service life of the material is prolonged and simultaneously convenience is provided for construction; the highly flame-resistant external wall heat preservation material has excellent flame resistance, lower smoke density and a higher oxygen index; and fire protecting safety property in a construction and use process is greatly improved due to the non-smoldering property of the highly flame-resistant external wall heat preservation material.

Description

technical field [0001] The invention belongs to the fields of building exterior wall heat preservation and building energy saving, and relates to a high-flame-retardant exterior wall heat preservation material and a production process thereof, which are mainly used for high-rise buildings and building body heat preservation and construction of isolation belts with relatively high fire protection level requirements. Background technique [0002] The popularization and application of external thermal insulation systems for building exterior walls has been developed in my country for more than 10 years. Driven by the national building energy conservation policies and regulations, the external thermal insulation technology independently developed in China has shown a vigorous development trend. Related standards, specifications and construction methods, etc. be continuously improved. Despite this, there are still differences in the development level of external wall thermal insul...

AI Technical Summary

Problems solved by technology

At present, insulation materials such as molded polystyrene foam, extruded polystyrene foam and rigid polyurethane foam are widely used in external wall insulation systems in our country, all of which are B2 flammable insulation materials, and there are great safety hazards

Aiming at the fire defects of the existing external wall insulation system, our company has developed a new type of high flame retardant external wall insulation material