What are the applications and excellent characteristics of polyurethane sealant

What are the applications and excellent characteristics of polyurethane sealant

2022-08-02 11:35:30
admin

Polyurethane sealant is widely used in civil construction, transportation and other industries:
Applications in construction - filling and sealing of doors and Windows, glass, etc.;
Applications in civil engineering - caulking sealing of expressways, Bridges and airstrips;
Automotive applications - Assembly and sealing of Windows (mainly windshield).
Polyurethane sealant has many excellent characteristics
1.Strong adhesion, large initial adhesion, wide application range
Because a NCO in the molecular chain of polyurethane adhesive can be reflected with a variety of functional groups containing active hydrogen, forming interfacial chemical bond binding, so it has strong adhesion properties to a variety of materials.Not only can bond porous materials, such as foam, ceramics, wood, fabric, etc., but also can bond a variety of metals, inorganic materials, plastics, rubber and leather, etc., is a wide range of application of adhesives.
2. outstanding low temperature resistance
At very low temperatures, the same polymer materials are converted to glass state and become brittle, while polyurethane adhesives can maintain high peel strength even below a 250℃, and their shear strength increases greatly with the decrease of temperature.

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