Bi-component polysulfide fireproofing flame retardant sealant and preparation method thereof

Abstract

The invention relates to a bi-component polysulfide fireproofing flame retardant sealant and a preparation method thereof, wherein the bi-component polysulfide fireproofing flame retardant sealant is prepared from the following components according to parts by weight: component A: 50-100 parts of liquid polysulfide rubber, 30-70 parts of flame retardant plasticizer, 50-150 parts of flame retardant filler, 60-200 parts of calcium carbonate, 0.3-1.2 parts of main agent micro-molecular finishing agent and 0.5-1.5 parts of silane coupling agent; component B: 10-30 parts of manganese dioxide, 20-60 parts of plasticizer, 1-3 parts of semi-strengthening agent carbon black and 0.4-1.5 parts of accelerant. The preparation method comprises the following steps of: mixing, stirring, vacuumizing, inspecting and packaging all the ingredients of component A; and mixing, stirring, vacuumizing, grinding, inspecting and packaging all the ingredients of component B. The sealant can be used by uniformly mixing A and B according to the mass rate of A: B being equal to 100:6-100:12. the sealant has good flame retardant property that is tested to be FV-0 level according to GB / T 2408-1996, and the oxygen index is tested to be 36.6 percent according to GB / T 2406-1993, and the both levels reach or exceed state-specified standards,.

Description

technical field [0001] The present invention relates to a two-component polysulfide sealant, in particular to a two-component polysulfide fire-proof and flame-retardant sealant, and also relates to a preparation method of the fire-proof and flame-retardant sealant, which belongs to the synthesis of polymer building materials and application areas. Background technique [0002] Polysulfide sealant has the advantages of low air permeability, good bonding performance, good oil resistance and solvent resistance, etc. It is widely used in the edge sealing of various insulating glass and is an excellent building sealant. The known polysulfide sealant is a two-component sealing material made of liquid polysulfide rubber as the main agent, adding appropriate amount of fillers and additives, and mechanically mixing. However, with the frequent occurrence of fires in recent years, the common polysulfide sealant can no longer meet the needs. In addition to the function of common polys...

AI Technical Summary

Problems solved by technology

However, with the occurrence of fires in recent years, ordinary polysulfide sealants can no longer meet the needs

In addition to the function of common polysulfide sealants, there are also some sealants with other additional functions on the market. As the Chinese Patent Gazette discloses a kind of application number 01144409.6, the name is: "two-component polysulfide sealant The invention patent of "waterproof sealant", this kind of sealant has also achieved a certain effect in the waterproof performance of polysulfide glue; in addition, the Chinese Patent Gazette also discloses an application number of 200610150004.3, the publication number is CN1958709A, and the name is: " Adhesive polysulfide sealant "invention patent, this kind of sealant contains A component and B component, wherein A component is composed of liquid polysulfide rubber, filler, plasticizer, silane coupling agent, etc.; B component group It can be used as vulcanizing agent, plasticizer, polymerization inhibitor, main agent small molecule treatment agent, colorant and accelerator, etc. Although this kind of sealant has achieved certain effects in the bonding performance of polysulfide adhesives, its flame retardant performance And overall performance is not ideal

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