An environmentally friendly polyurethane two-component glue

Abstract

The invention discloses environment-friendly polyurethane two-component corner-crimping glue. The corner-crimping glue consists of a component I and a component II, wherein a weight ratio of the component I to the component II is 10:1 to 1:10, the component I comprises the following components: 41-52 percent of polyhydric alcohol A, 30-40 percent of filler A, 8-15 percent of filler B, 6-12 percent of modifier, 0.05-0.1 percent of catalyst, 1-2 percent of surfactant A, 2-5 percent of plasticizer A and 5-10 percent of plasticizer B; and the component II comprises the following components: 50-60 percent of isocyanate, 15-25 percent of MDI prepolymer, 10-16 percent of filler C, 2-6 percent of polyhydric alcohol B, 1-2 percent of surfactant B and 10-15 percent of plasticizer C. The comprehensive strength of the corner-crimping glue is greatly superior to that of polyurethane single-component corner-crimping glue, and the corner-crimping glue is high in stability and high in curing speed; and the corner-crimping glue has excellent joint filling capacity and is suitable for corner-crimping insertion of aluminum alloy doors and windows and curtain walls and overall corner cementing adhesion-sealing.

Description

technical field [0001] The invention relates to the technical field of building adhesives, in particular to an environmentally friendly polyurethane two-component corner glue, which is used for bonding, sealing and sealing the corners of aluminum alloy doors and windows, curtain walls, and large aluminum alloy doors and windows and curtain walls. enhanced. Background technique [0002] The energy conservation and emission reduction advocated by the world today is the common goal of all countries in the world, and it is also a basic national policy of my country's reform, opening up and economic development. Building energy conservation and emission reduction is one of the very important topics. According to statistics, building energy consumption accounts for about 27.6% of the total energy consumption of the whole society, and among the four energy consumption of doors, windows, walls, roofs and floors of civil buildings, the energy consumption of doors, windows (curtain w...

AI Technical Summary

Problems solved by technology

[0007] Secondly, the movement error generated during the production, handling, transportation, and installation of aluminum alloy doors and windows; after the doors and windows are completed, they must bear their own weight for a long time, and bear the static stress error caused by the deformation of the door and window openings and the building wall; opening and closing doors and windows, environmental sound waves, etc. Spike impacts and vibrations of different frequencies induce resonance in doors and windows, thus affecting the overall strength of rigidly connected doors and windows

[0008] The above reasons will cause the gaps at the corners of the doors and windows to gradually increase and dislocation over time, resulting in a decrease in the airtightness, heat insulation, sound insulation, and dust insulation of the doors and windows, and in severe cases, deformation of the doors and windows, resulting in adverse consequences

[0009] 2. The problem of using non-specialized corner glue

However, it still cannot meet the requirements of high bonding strength, high reinforcement, and high sealing door, window, and curtain wall products; because it is a one-component adhesive, it is cured by moisture, and the curing speed of the colloid is greatly affected by the temperature and humidity of the environment. The time for bonding in summer will also be 5-6 hours, which is far from being able to adapt to the high-efficiency production rhythm

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