（1）Performance and Application Resins containing many repeating reactive groups on the main chain are called polyamino acids Formate, referred to as polyurethane. The structures of polyurethane and polyamide are very similar, except that the active group of the former has one more oxygen atom than the active group of the latter, so the properties of the two have many similarities.
JuAmmoniaester Adhesiveis made of differentCyanideAcid ester and Polyester or polyetherand other compositions, highly polar and active, and have good adhesion to various metal and non-metal materials, makeBy adjusting the types and proportions of the components, a flexible or even hard adhesive layer can be obtained. It can be cured at high temperatures or at room temperature, and is widely used.
Polyurethane adhesive is water-resistant, oil-resistant, and solvent-resistant, ozone-resistant, bacteria-resistant It has excellent bonding strength especially at low temperatures, so it is a promising low-temperature adhesive.
JuAmmoniaester Sticky合AgentFor metal, wood, rubber, Fabrics and most plastics (especially polyvinyl chloride containing large amounts of plasticizers) have good affinity. It is widely used in lamination of adhesive fabrics for light packaging materials, manufacturing of composite materials, electrostatic flocking, manufacturing of non-woven fabrics, shoemaking, rubber products and sealant manufacturing, etc. It is expected that there will bein the futureGreater development.
（2) Caprolactone polyolsPolyurethaneAdhesive This type of adhesiveAgent Department of internal EsterYu Er元 Alcohol AntiDeserve, it is the same as ordinaryPolyester has the following advantages: ① Good color;②The structure is uniform…, the molecular weight distribution is uniform, ③onlyActive hydroxyl groups with terminal groups and a clear number of functional groups;④Hydrolysis resistance, Good low-temperature softness; 5. Because of low viscosity, severalAlmost ok100% cured, and can be used with a wide range of solvents, ⑥ and polyetherCompared with the other categories, the outdoor durability is particularly outstanding.
