Polyol Series Applications
In the adhesive, the use polycaprolactone polyols, polyurethane adhesive system were compared with other polyester polyols have a better color, hydrolytic stability and uniformity. Benefits Low density in comparison with other types of polyester polyol based polyurethanes, circa 4% lower PU density Very good hydrolysis resistance in comparison with other types of polyester polyols Excellent low-temperature properties and wide working temperature range Low viscosity polyols and polyurethanes lead to reduced solvent and VOCs Polycaprolactone polyols provide excellent oil and UV stability Excellent adhesion to various substrates including leather
In the paint, the polycaprolactone polyol can be used as reactive diluent and modifier in polyurethane, acrylic, polyester, epoxy and vinyl coatings. When polycaprolactone polyol is used as reactive diluent, can be used in baking-type melamine and room temperature curing isocyanate cross-linking agent coating. When as a solvent modifier in paint, in addition to reducing VOC, it also can get the necessary balance of hardness and flexibility and does not affect the film properties. Benefits Highly functional liquid polyols produce flexible Low-viscosity polyols and pre-polymers reduce/eliminate solvent and VOCs Very good hydrolysis resistance compared with other polyesters Polyester gives excellent solvent, chemical and UV resistance Low Tg (-60°C) gives good low-temperature flex properties provides good bonding to substrates High-clarity, light stable coatings Consistent, controlled reactivity Stable pre-polymers
Polycaprolactone polyol is by caprolactone monomer, initiators, catalysts formed by the ring-opening polymerization, with a high reactivity, low viscosity, molecular weight distribution narrowly and low acid value and low water content, the products are mainly used in polyurethane elastomers, coatings and adhesives and other fields. In the polyurethane elastomer, most polycaprolactone polyols obtained elastomer to improve its tear resistance, and with the polycaprolactone polyols in PU elastomers obtained good hydrolytic stability and low temperature flexibility, which are far superior than usually polyether and polyester as the raw material of the PU elastomer, its temperature resistance, mechanical properties and solvent are also superior to other polyurethane rubber. Benefits have a lower density than those derived from polyadipates can be used with both aliphatic and aromatic isocyanates Outstanding resilience giving elastomers with low hysteresis properties All primary hydroxyl groups ensure consistent and fast reactions Very good low-temperature flex fatigue performance Low polyol viscosity for ease of processing Excellent cut and tear properties Good hydrolysis resistance High abrasion resistanceIn addition, the lower molecular weight polycaprolactone diols and triols can be used as chain extenders in polyurethane formulations.