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• 中文名称：Lt-1146 Diaminosilane oligomer
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Principle of action:

Lt-1146 can not only show excellent wettability to the material interface, but also form chemical bond with the material interface which is difficult to bond. The amino group provides the chemical field which can react with the active matrix polymer, and the alkyl group gives excellent hydrophobicity. Therefore, lt-1146 is widely used as coating, adhesive and sealant to improve RTV silicone rubber, two-component polyurethane, Adhesion and wettability of silicone modified polyurethane, siloxane end capped polyether, two-component epoxy resin to inorganic surface and plastic surface.

The oligomer derived from silane coupling agent has the characteristics of low emission (40% - 55% less than the same kind of monomolecular silane), strong adhesion, high boiling point, low volatility, multi-functional, less dosage, low yellowing and excellent water resistance, and is widely used in the fields of coating, adhesive, sealant, plastic, powder and metal. Therefore, the research on oligomer technology of silane coupling agent derivative has been carried out. Extensive attention. Functional silane coupling agent oligomer (also known as silane oligomer) is a kind of functional silicone compound with low viscosity, few chain links, high functionality and active reaction groups in chain structure formed by hydrolysis / condensation of one or more silane coupling agents. It can be used to modify organic polymers (such as epoxy resin, polyurethane, acrylic acid, polyester, polyurea, etc.) with excellent compatibility. The controllability of molecular design can significantly improve the thermal stability, impact strength, adhesive strength, lubricity, flame retardancy, antifouling, wear resistance, solvent resistance and air permeability of the polymer.

Application information:

After the professional's bond test in epoxy adhesive, the bond force of PVC, polystyrene, nylon 6, nylon 66 and plastic plate is obviously increased by about 30% by adding 3% of 1146 of epoxy adhesive. For polyethylene, polypropylene and polytetrafluoroethylene, the increase of adhesion is not obvious.

Features and advantages:

Low volatility, low viscosity, significantly reduced by-product formation (VOC);

It improves the film-forming property on the substrate, excellent adhesion without primer, improvement of wet adhesion and stability, small odor, light color, less impurities during curing, rapid film-forming, rapid and even joint curing, and has excellent flexibility and resilience.

Application information:

The sealant with 2 adhesive accelerants added to every 100 resins can form good adhesion with glass, aluminum and primary concrete. Aminosilane adhesion promoter has a significant effect on the crosslinking density of silane cured polyurethane sealant. 1146 polymer can improve the elongation at break. At the same time, 1146 provides a more flexible cross-linking point to obtain a more flexible sealant;

Because of its unique oligomer structure, 1146 has excellent wettability on the substrate, and can have excellent weather resistance and moisture resistance when it is difficult to bond. Obviously, if you want to prepare low modulus silane cured polyurethane sealant with excellent fluidity and wet bonding performance, the best choice is to add bonding accelerator 1146.