Water-soaking-resistant flame-retardant single-component silane modified polyether sealant and preparation method thereof

Abstract

The invention discloses a water-soaking-resistant flame-retardant single-component silane modified polyether sealant which comprises the following components in parts by weight: 100 parts of silane-terminated modified polyether, 8-15 parts of a plasticizer, 18-40 parts of a pigment and filler, 12-36 parts of a flame retardant, 1-6 parts of a thixotropic agent, 0.02-1 part of an ultraviolet light absorber, 0.02-1 part of an ultraviolet stabilizer, 2-6 parts of a cross-linking agent, 0.2-2 parts of a dewatering agent, 1-4 parts of a self-made tackifier, and 0.1-0.8 part of a catalyst. The self-made tackifier is organic silicon modified epoxy resin synthesized by reacting an organic silicon oligomer with at least two hydrolysable alkoxy silane at one end with epoxy resin, wherein alkoxy is methoxy, ethyoxyl or propyl. The invention also discloses a preparation method of the sealant. According to the invention, the water soaking resistance, flame retardance and adhesive property of the single-component modified silane polyether sealant are improved, so that the double requirements of buildings on water resistance and flame retardance of the sealant are met at the same time.

Description

technical field [0001] The invention relates to the field of sealants, more specifically, to a water-resistant and flame-retardant one-component silane-modified polyether sealant and a preparation method thereof. Background technique [0002] Prefabricated buildings are one of the main directions of future architectural development. With the development of prefabrication, large-scale, high-rise, underground, diversification and longevity of modern prefabricated buildings, the performance and quality of sealants for construction are greatly affected. Higher requirements are put forward, especially the construction industry has higher and higher requirements for waterproof and fireproof grades, so the requirements for the waterproof performance and flame retardant performance of the building sealants used are also higher and higher; the current wide application The polysulfide sealant, silicone sealant and polyurethane sealant used in the construction industry all have some di...

AI Technical Summary

Problems solved by technology

[0002] Prefabricated buildings are one of the main directions of future architectural development. With the development of prefabrication, large-scale, high-rise, underground, diversification and longevity of modern prefabricated buildings, the performance and quality of sealants for construction are greatly affected. Higher requirements are put forward, especially the construction industry has higher and higher requirements for waterproof and fireproof grades, so the requirements for the waterproof performance and flame retardant performance of the building sealants used are also higher and higher; the current wide application The polysulfide sealant, silicone sealant and polyurethane sealant used in the construction industry all have some disadvantages. For example, polysulfide sealant has slow curing speed at low temperature, easy aging and hardening, lack of durability, and strong stimulation when curing. Strong odor, which will pollute the environment and endanger health; polyurethane building sealant is cheap, has excellent adhesion, and has excellent deformation adaptability, but its structure contains a large number of carbamate bonds, which are serious in terms of UV resistance. Insufficient; silicone rubber is excellent in acid and alkali resistance and weather resistance, but it is easy to contaminate adjacent parts, and the surface decoration is poor, etc.

However, the traditional modified silane polyether sealant has poor water resistance and low strength compared to epoxy adhesives, polyurethane adhesives, acrylic adhesives, etc., which greatly limits its application fields. Combustible, excellent sealants are of great significance

Images