(2018-4-27) One-component polyurethane sealant
One-component polyurethane sealant
One-component polyurethane sealant is a solvent-free one-component room-temperature curing sealant. The sealant is in paste form and can be extruded or painted. Anti-sagging, vertical seams and top seams do not run. The cured adhesive layer is rubbery and elastic. Adhesion to metals, rubber, wood, cement components, ceramics, glass, etc. Sealant is used to fill the voids (holes, joints, joints, etc.) of the material, both bonding and sealing two major functions.
Polyurethane sealants are widely used in civil construction, transportation and other industries:
1. Application in construction - filling and sealing of doors, windows, glass, etc.;
2. Application in civil engineering - caulking sealing of highways, bridges, airstrips, etc.;
3. Applications in the automotive sector - Assembly sealing of windows (mainly windshields).
Sealant is used to fill the voids (holes, joints, joints, etc.) of the material, both bonding and sealing two major functions. Polyurethane sealant and silicone sealant, polysulfide sealant constitute the three major varieties of high-grade sealant.
1. Wide adjustable performance and strong adaptability;
2. Good wear resistance
3. Large mechanical strength;
4. Good bonding performance;
5. Good elasticity, excellent resilience, can be used for dynamic joints;
6. Low temperature flexibility;
7. Good weather resistance, long service life of 15 to 20 years;
8. Good oil resistance;
9. Resistant to biological aging;
10. The price is moderate.
"One-component" is mainly relative to "two-component". There is a two-component polyurethane adhesive. When using it, it is necessary to mix A and B components in proportion to be evenly mixed to achieve the effect of adhesive sealing. ; And single components are used directly, convenient, concise and easy to construct. "Moisture cure" means that the one-component polyurethane adhesive is cured by a trace amount of water vapor reaction in the air, and reacts with the active group on the surface of the substrate to serve as an adhesive.
Compared with traditional silicone rubber, polyurethane rubber has a high elongation of 3 times or more and a bond strength of 2 times or more.
One-component polyurethane rubber is completely non-toxic after curing, and can be used in drinking water projects. It has passed authoritative tests.
