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    Home > Coatings News > Paints and Coatings Market > Automotive adhesive research and application - windshield bonding sealant.

    Automotive adhesive research and application - windshield bonding sealant.

    • Last Update: 2020-10-05
    • Source: Internet
    • Author: User
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    Windshield bonding sealant
    the use of "direct bonding method" for car and high-end passenger car windshield assembly, is a common domestic automobile manufacturers have adopted an advanced technology. Compared with the assembly process of the traditional rubber seal fixed windshield glass, it has the outstanding characteristics of high fixed strength, good sealing performance, simple assembly process and beautiful appearance.
    single-component moisture-cured polyurethane bonding sealant is the ideal adhesive for "direct bonding"

    . The adhesive was first developed by Essex Chemical in the early 1970s and was first used in General Motors as an alternative to polysulfur rubber adhesives. Single-group polyurethane windscreen glass glue usually needs to be used in support of glass substrates and lacquer substrates, after wet curing of the glue, requiring its bonding shear strength greater than 3.5MPa, stretch strength greater than 5.0MPa, fracture elongation rate of more than 350%, in addition to the requirements at room temperature can be quickly cured, operation stacking is good, the storage period under normal conditions is more than 6 months. Due to the demanding requirements of these unique properties and process properties, as well as the lack of domestic raw materials and equipment, it is very difficult to develop and produce this product. Therefore, some domestic introduction of model windshield bonding assembly used in a single component of polyurethane glue are imported. In order to meet the needs of the development of the domestic automobile industry, single-part wet cured polyurethane windscreen glass glue is listed as one of the national key science and technology adhesive new varieties of development projects. To this end, the relevant domestic research units actively develop and develop, the research and development work based on domestic raw materials and equipment conditions, polyether polyols and polycyanate as raw materials, the use of product performance to reach the car windscreen glass adhesive / sealant technical requirements. In recent years, the development and research of single-group wet-solid polyurethane windscreen glass glue has made new progress, and the domestic Aobo company has developed this kind of products using domestic raw materials, taking a unique synthetic formula and process. At the same time, the successful development of metal, glass, lacquer and other 4 kinds of substrate. The physical mechanical and process properties of its products meet German volkswagen standards. At present, a series of products have begun to be used in a number of domestic automotive factories.
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