A quick installation method for vehicle glass

Abstract

The invention provides a quick installation method for vehicle glass. The method undergoes base surface treatment, gluing assembly and infrared radiation curing treatment to complete the installation of the vehicle and glass; the heat-cured one-component polyurethane sealant used in gluing Including the following raw materials: polyether-type aliphatic polyurethane prepolymer with isocyanate groups at the end, isocyanate-modified epoxy resin, ketimine latent curing agent A, dicyandiamide and imidazole in a mass ratio of 1:0.1-0.6 Composed of latent curing agent B, fillers, plasticizers, epoxy soybean oil and other additives. The installation method uses infrared radiation to cure the heat-curing one-component polyurethane sealant, which can shorten the installation time of the vehicle glass, has simple tooling, can ensure the installation quality of the vehicle glass, and can improve the installation efficiency of the vehicle glass and reduce costs. , to ensure its safe use.

Description

technical field [0001] The invention relates to the technical field of sealant application, in particular to a quick installation method for heat-curing one-component polyurethane sealant applied to vehicle glass. Background technique [0002] Polyurethane sealant has the characteristics of excellent wear resistance, elasticity, low temperature softness, wide range of performance adjustment, designability, and high tensile strength, and is widely used in filling buildings, bridges, roads, tunnels, etc. Seam treatment, as well as bonding and sealing in transportation industry, electronic filling industry, automobile manufacturing, etc. [0003] The existing one-component polyurethane sealant is moisture-curing at room temperature and has the characteristics of convenient construction. However, the one-component polyurethane sealant exhibits slower tack-free time and curing speed in a lower temperature and humidity environment, and this will delay the installation time of the...

AI Technical Summary

Problems solved by technology

However, the one-component polyurethane sealant exhibits slower tack-free time and curing speed in a lower temperature and humidity environment, and this will delay the installation time of the vehicle glass, and it is also easy to cause the one-component polyurethane If the sealant is not fully cured, it will lead to an increase in the water leakage rate of the vehicle in the rain, and in the severe case, it will cause the windshield of the vehicle to slide or fall off, which has a greater impact on commercial vehicles or motor vehicles.

[0004] After installing the windshield of existing commercial vehicles or motor vehicles, fixed rivets or self-adhesive tapes will be used to fix the windshield, so that the polyurethane sealant can be further cured. When the temperature is high in summer, it is beneficial to the one-component polyurethane seal. The curing of the glue can remove the fixing rivets in about 8 hours, but in winter when the temperature is low, this time may be extended to 24 hours or even longer, otherwise the strength of the incompletely cured polyurethane sealant will not reach the next level. assembly process or delivery requirements, thereby reducing the production quality and production efficiency of the vehicle

The two-component polyurethane sealant is a reaction curing type, and its curing speed is fast, but because it needs to be configured in a certain proportion when used, the process is relatively complicated, and the hardness of the two-component polyurethane with high strength after curing is relatively high, reaching 80 Shore D has almost no elasticity. If it is used to install the windshield of a vehicle, it may cause the glass to break under the impact of external force and endanger the safety of the occupants in the vehicle.

Moreover, the two-component polyurethane sealant currently on the market for installing vehicle windshields also has the disadvantages of complicated tooling, difficult construction, high cost, and difficult application.

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