High-temperature-ablation-resistant fireproof silicone sealant and preparation method thereof

Abstract

The invention discloses a high-temperature-ablation-resistant fireproof silicone sealant and a preparation method thereof. The high-temperature-ablation-resistant fireproof silicone sealant is prepared from, by mass, 40-60 parts of alpha, omega-dihydroxy polydimethylsiloxane, 25-50 parts of a fireproof flame-retardant filler, 3-6.5 parts of a fluxing agent, 2.5-5 parts of a sintering additive, 3-5parts of a high-efficiency flame retardant, 1-3 parts of an anti-collapse agent and 0.1-1.0 part of a catalyst. The high-temperature-ablation-resistant fireproof silicone sealant and the preparationmethod thereof have the advantages that the disadvantages of an existing domestic fireproof sealant are overcome, it is achieved that the high-temperature-ablation-resistant fireproof silicone sealanthas the same excellent mechanical property, adhesive property and processing property as an ordinary fireproof flame-retardant polyamino acid sealant at the normal temperature, the fireproof sealantcan maintain the original shape at the high temperature, the efflorescence phenomenon does not occur, and the sealant maintains good adhesion with glass, aluminum alloys, cement and other base materials, thereby meeting the fire resistance rating requirements of building fireproof blocking materials.

Description

technical field [0001] The invention belongs to the field of sealants, in particular to a high-temperature ablation-resistant fireproof silicone sealant and a preparation method thereof. Background technique [0002] Fire safety is related to people's quality of life and the safety of people's lives and properties. At home and abroad, there are accidents that cause serious casualties and property losses due to various building fires every year, so building fire safety has received more and more attention. When a fire breaks out, if the glass curtain wall of the building is broken or the gaps between the floors are not tightly sealed, it may cause flames and smoke to spread to surrounding rooms. Toxic smoke can also spread through cables through holes, elevator shafts, etc. . In order to prevent the rapid spread of flames and toxic and harmful smoke in buildings, various fireproof sealing materials should be correctly used. [0003] Although there are various inorganic and...

AI Technical Summary

Problems solved by technology

For example, inorganic fireproof sealing mud is easy to crack when heated, has poor elasticity and weak displacement resistance; organic flame retardant sealants have flame retardant properties, but the fireproof effect is not good; although intumescent fireproof sealants have a certain fireproof sealing effect, but The structure of the ablation product is loose, which is easy to cause stress damage or cracking, resulting in plugging failure

At present, there is no sealant in China that can meet the requirements of flame retardancy, fire prevention and physical and mechanical properties at the same time.

Images