One-component deacidified silicone sealant for bonding outdoor handicrafts and preparation method thereof

Abstract

The invention discloses single-component deacidified organosilicone sealant for bonding outdoor crafts, and a preparation method of the single-component deacidified organosilicone sealant. The single-component deacidified organosilicone sealant is prepared from the following raw materials in parts by weight: 30-100 parts of alpha-omega-dihydroxypolydimethylsiloxane, 1-10 parts of fumed silica, 10-30 parts of polydimethylsiloxane, 1- 8 parts of a crosslinking agent, 0.1-4 parts of a catalyst, 0.1-4 parts of a tackifier and 0.1-2 parts of modified aluminum-silver paste. The single-component deacidified organosilicone sealant for bonding the outdoor crafts is excellent in bonding performance when being used for filling base materials, aluminum materials, glass and the like of the crafts during bonding of the outdoor crafts; when being naturally damaged due to long-term ultraviolet irradiation and long-term exposure to air, the single-component deacidified organosilicone sealant still maintains good bonding performance with the base materials; furthermore, the sealant is high in retention rate of mechanical properties, and good glossiness can be maintained after the aluminum-silver paste is added for modification.

Description

technical field [0001] The invention belongs to the technical field of organic binders, in particular to a one-component deacidification type silicone sealant for bonding outdoor handicrafts and a preparation method thereof. Background technique [0002] At present, with the rapid development of cities, modern parks, shopping malls, tourist attractions, schools, etc. are decorated with decorations, so that decorations also put forward higher requirements for the adhesiveness of glue. Many realistic ones require good bonding effect, UV resistance, long-term elasticity, and most importantly, long-term gloss. Sealant is a kind of material used to fill the configuration gap to play the role of bonding and sealing. It has high elasticity, anti-ultraviolet, heat insulation and other functions. In the field of construction, it is mainly used for bonding and sealing between doors and windows, aluminum, glass, aquariums, aquariums and other substrates. Adhesive products mainly incl...

AI Technical Summary

Problems solved by technology

Due to its high strength, low elongation, and small displacement capacity, the silicone weather-resistant adhesive is easy to be pulled and cracked, which can easily cause bonding failure, resulting in poor appearance of handicrafts and color aging.

In the production process of general neutral glue or glass glue, a large amount of non-silicone plasticizers are added. On the one hand, such plasticizers will migrate slowly over time, which will increase the shrinkage stress of the sealant itself. , and the bonding failure will eventually lead to the falling off of the filled profile. On the other hand, the unsuitable sealant will also cause the glue and the filled substrate to fall off, so that the effect of bonding and aesthetics will not be achieved, and the increase will be increased. The cost of re-maintenance and the waste of materials and social resources

[0003] In view of the fact that there is no one-component deacidification silicone sealant specially used for bonding outdoor handicrafts in the market, a comprehensive performance one-component deacidification silicone sealant for bonding handicrafts is developed to ensure its Safety, stability and gloss during use are very important

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