High-performance curtain wall silicone structural adhesive

Abstract

The invention is applicable to the technical field of curtain wall structural adhesives, and provides a high-performance curtain wall silicone structural adhesive which comprises the following components in percentage by mass: 50% of hydroxyl-terminated polydimethylsiloxane, 40% of calcium carbonate, 4.5% of carbon black, 4% of methyltris (methylethylketoxime) silane, 0.8% of vinyltris (methylethylketoxime) silane, 0.6% of multifunctional silane and 0.1% of a catalyst. Preferably, the catalyst is one or more of dibutyltin dilaurate and di-n-octyltin dilaurate; preferably, the multifunctional silane is one or more of 3-amino propyl triethoxy silane and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane, and the multifunctional silane is one or more of 3-amino propyl triethoxy silane and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane. The prepared structural adhesive is neutral, high in curing speed and free of corrosion to most of metal, coated glass and marble; after being completely cured, the weather-resistant and aging-resistant coating has excellent weather resistance and aging resistance, keeps good performance in a temperature range of-50 DEG C to + 100 DEG C, and has good cohesiveness and compatibility to most building materials.

Description

Technical Field

[0001] The invention relates to the technical field of curtain wall structural adhesives, in particular to a high-performance curtain wall silicone structural adhesive. Background Art

[0002] Curtain wall structural adhesive is a special adhesive used for sealing and structural connection in building curtain wall systems. It plays a very important role in modern buildings, especially in facade decoration and structural support systems such as high-rise buildings, glass curtain walls, and metal curtain walls. The main functions of curtain wall structural adhesive include the following:

[0003] ①. Load-bearing and supporting function: Curtain wall structural adhesive is not only used for sealing, but also bears a certain structural load to ensure that the glass or other materials on the facade can be firmly connected to the main structure of the building.

[0004] ② Weather resistance: Since the building facade is exposed to sunlight, rain, wind and snow and other environmental conditions all year round, the curtain wall structural adhesive must have excellent weather resistance, be able to resist the influence of ultraviolet rays, temperature changes, humidity changes and other factors, and not easy to age, discolor or fall off.

[0005] ③. Sealing: Curtain wall structural adhesive has good sealing performance, which can prevent rainwater, air, etc. from penetrating into the interior of the building, ensuring the building's waterproof, windproof and soundproof effects.

[0006] ④. Elasticity and earthquake resistance: Curtain wall structural adhesive needs to have a certain elasticity to adapt to the deformation of the building in different environments, prevent stress concentration caused by temperature changes, wind force, etc., and avoid structural damage.

[0007] Most of the existing curtain wall structural adhesives have poor durability and poor performance in extremely severe weather. In response to this, the present invention proposes a high-performance curtain wall silicone structural adhesive. Summary of the invention

[0008] The object of the present invention is to provide a high-performance curtain wall silicone structural adhesive to solve the problems in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: The present invention provides a high-performance curtain wall silicone structural adhesive, and the components and mass percentages of the weather-resistant adhesive are as follows:

[0010] 50% terminal hydroxyl polydimethylsiloxane, 40% calcium carbonate, 4.5% carbon black, 4% methyl tributylacetoximate silane, 0.8% vinyl tributylacetoximate silane, 0.6% multifunctional silane, and 0.1% catalyst.

[0011] Preferably, the catalyst is one or more of dibutyltin dilaurate and di-n-octyltin dilaurate.

[0012] Preferably, the multifunctional silane is one or more of 3-aminopropyltriethoxysilane and 3-(2,3-epoxypropyloxy)propyltrimethoxysilane.

[0013] Preferably, the application fields of the structural adhesive include but are not limited to high-end curtain walls, structural bonding of building hidden frames, semi-hidden frame glass curtain walls, and secondary bonding and sealing of structural insulating glass.

[0014] Preferably, the operating temperature range of the structural adhesive is -50°C to +100°C.

[0015] The present invention has at least the following beneficial effects:

[0016] The invention provides a high-performance curtain wall silicone structural adhesive. The prepared structural adhesive is neutral, has a fast curing speed, and is non-corrosive to most metals, coated glass and marble; after being fully cured, it has excellent weather resistance and aging resistance, maintains good performance in the temperature range of -50°C to +100°C, and has good adhesion and compatibility with most building materials. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1

[0019] This embodiment provides a high-performance curtain wall silicone structural adhesive, and the components and mass percentages are as follows:

[0020] 50% terminal hydroxyl polydimethylsiloxane, 40% calcium carbonate, 4.5% carbon black, 4% methyl tributylacetoximate silane, 0.8% vinyl tributylacetoximate silane, 0.6% multifunctional silane, and 0.1% catalyst.

[0021] The catalyst is dibutyltin dilaurate; and the multifunctional silane is 3-aminopropyltriethoxysilane.

[0022] Example 2

[0023] This embodiment provides a high-performance curtain wall silicone structural adhesive, and the components and mass percentages are as follows:

[0024] 50% terminal hydroxyl polydimethylsiloxane, 40% calcium carbonate, 4.5% carbon black, 4% methyl tributylacetoximate silane, 0.8% vinyl tributylacetoximate silane, 0.6% multifunctional silane, and 0.1% catalyst.

[0025] The catalyst is di-n-octyltin dilaurate; the multifunctional silane is 3-(2,3-epoxypropoxy)propyltrimethoxysilane.

[0026] Example 3

[0027] This embodiment provides a high-performance curtain wall silicone structural adhesive, and the components and mass percentages are as follows:

[0028] 50% terminal hydroxyl polydimethylsiloxane, 40% calcium carbonate, 4.5% carbon black, 4% methyl tributylacetoximate silane, 0.8% vinyl tributylacetoximate silane, 0.6% multifunctional silane, and 0.1% catalyst.

[0029] Among them, the catalyst is a mixture of dibutyltin dilaurate and di-n-octyltin dilaurate, and the mixing ratio is 3:1; the multifunctional silane is a mixture of 3-aminopropyltriethoxysilane and 3-(2,3-epoxypropyloxy)propyltrimethoxysilane, and the mixing ratio is 1:1.

[0030] The products prepared in the above Examples 1-3 were subjected to a series of relevant tests according to GB 16776-2005, and the results are shown in Table 1 below:

[0031] Table 1 Test results

[0032]

[0033]

[0034]

[0035]

[0036] The product prepared by the present invention is suitable for structural bonding of high-grade curtain walls, building hidden frame, semi-hidden frame glass curtain walls and secondary bonding and sealing of structural hollow glass. It is a neutral curing silicone structural adhesive with a fast curing speed and no corrosion to most metals, coated glass and marble. After being fully cured, it has excellent weather resistance and aging resistance, maintains good performance in the temperature range of -50°C to +100°C, and has good adhesion and compatibility with most building materials.

[0037] The structural adhesive of the present invention exhibits excellent stability and reliability during long-term use, significantly improving the safety and service life of building curtain walls; its unique formula design enables it to maintain excellent performance under a variety of climatic conditions, especially in high temperature, low temperature and humid environments, it can still maintain good bonding strength and elasticity; in addition, the structural adhesive is easy to operate during construction and has a short curing time, which greatly improves construction efficiency. Through a number of strict quality inspections and practical application verifications, the high-performance curtain wall silicone structural adhesive of the present invention has broad application prospects in the construction industry, can meet the strict requirements of modern high-rise buildings for curtain wall systems, and provide a solid guarantee for building safety.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance curtain wall silicone structural adhesive, characterized in that: The components and mass percentages of the structural adhesive are as follows: 50% terminal hydroxyl polydimethylsiloxane, 40% calcium carbonate, 4.5% carbon black, 4% methyl tributylacetoximate silane, 0.8% vinyl tributylacetoximate silane, 0.6% multifunctional silane, and 0.1% catalyst.

2. A high-performance curtain wall silicone structural adhesive according to claim 1, characterized in that: The catalyst is one or more of dibutyltin dilaurate and di-n-octyltin dilaurate.

3. The high-performance curtain wall silicone structural adhesive according to claim 1, characterized in that: The multifunctional silane is one or more of 3-aminopropyltriethoxysilane and 3-(2,3-epoxypropyloxy)propyltrimethoxysilane.

4. The high-performance curtain wall silicone structural adhesive according to claim 1, characterized in that: The application fields of the structural adhesive include but are not limited to high-end curtain walls, building hidden frame, semi-hidden frame glass curtain wall structural bonding and structural insulating glass second-layer bonding and sealing.

5. The high-performance curtain wall silicone structural adhesive according to claim 1, characterized in that: The operating temperature range of the structural adhesive is -50°C to +100°C.

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