Process for producing flame-proof fluid sealant for construction

Abstract

The invention relates to a preparation method of the seal glue of an inflaming retarding construction, which belongs to the technical field of the seal glue and comprises: at first, a first polylol and a second polylol are mutually mixed; then isocyanate and dibutyl tin laurate are added for reacting and preparing polyurethane prepolymer; then a terminated silane coupling agent is added for obtaining silane terminated polyurethane prepolymer; then the silane terminated polyurethane prepolymer is stirred mutually and mixed with dried nanometer fillings, a chemical inhibitor, a UV absorbent, a plasticizer, a thixotropic agent, dye and a flame retardant; then a deicer, a caking accelerant, and a catalyst are added, stirred and mixed for preparing the seal glue. The seal glue of the inflaming retarding construction does not have dissociative isocyanate, adopts halogen-free and inflaming retarding technology which is harmless to environment, producing and the health of users, has very good sticking performance with the materials such as glass, aluminum, marble, cement and the like, has good UV resistance and stability and can be broadly applied to the fields of construction, container, road, airport construction, and the like.

Description

technical field

[0001] The invention relates to a method for preparing a flame-retardant building sealant, which belongs to the technical field of sealants. Background technique

[0002] Silane-modified polyurethane is a new type of material. It has the advantages of both polyurethane and silicone materials. It has excellent properties such as moisture resistance, oil resistance, chemical resistance, wear resistance, and good storage stability. It has been widely used in Europe in recent years. For the preparation of high performance room temperature vulcanizing sealants. Compared with traditional polyurethane sealants, silane-modified polyurethane has obvious advantages in terms of curing mechanism, performance and use: from the perspective of curing mechanism, silane-modified polyurethane is under the action of a catalyst, the alkoxy group of silane and moisture Carry out hydrolysis and condensation to form a stable three-dimensional network structure of siloxane (Si-O-Si...

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