The preparation of polyaspartic polyurea adhesive usually requires the addition of a thickener, base material wetting agent, adhesion promoter, various fillers, and other auxiliary materials. These additional materials are added to the resin component as far as possible. At the same time, I am avoiding adding to the curing agent component because the curing agent component is highly active, which is easy to absorb moisture in the air in the process of processing and thickening metamorphism. Moreover, the additives added by polyaspartic polyurea adhesive must avoid bringing in amine groups, hydroxyl groups, and compounds because these substances have a noticeable catalytic effect on polyaspartic polyurea resin, which will significantly shorten the operating time. Adding adhesives to a variety of color filters also requires drying treatment.
The reaction speed of polyaspartic polyurea adhesive can be controlled, and the reaction time can be held from 1 minute to dozens of minutes. The reaction speed of the polyurea adhesive can also be adjusted according to the construction requirements. The construction team must mix and use the glue quickly in quick repair.
In terms of product design, there are two options: first, the highly active polyaspartic polyurea resin such as F621 or F220 be combined with aliphatic isocyanate curing agent HDI trimer; Second, conventional polyaspartic polyurea resin-like F420, F520, be combined with highly active aromatic isocyanate curing agent MDI, TDI prepolymer, etc.
Some yellowing resistance requirements include windowsill floor tile sealant, exposed doors and windows with group angle glue, advertising luminous letters, and outdoor USE of LED lamp packaging. In product design, resin components consist of F520, F420, F5240, and other resins. In curing agent components, according to the requirements of specific mechanical properties, the appropriate materials could be conventional trimer, biuret, HDIIPDI and polyester diol, polycarbonate diol, and another adduct, such as Feiyang's GB926, GB509. So that more expansive performance space can be obtained.
Contact Person: Ms. Annie Qing
Tel: +86 18307556691