polyisocyanate การใช้

• Polyurethane polymers are traditionally and most commonly formed by reacting a di-or polyisocyanate with a polyol.
• Two-component fluorinated polyurethanes prepared by reacting FEVE fluorinated polyols with polyisocyanate have been used to make ambient cure paints and coatings.
• For polyurethane one component of the mixture is polyisocyanate and the other component is a blend of polyol, surfactant, catalyst, and blowing agent.
• Eventually, the advantages of using polyaspartic esters as the main component of the co-reactant for reaction with an aliphatic polyisocyanate in low to zero volatile organic compound ( VOC ) coatings has been realized.
• Polyaspartic is actually an aliphatic polyurea because it is derived from the reaction product of an aliphatic polyisocyanate component and a polyaspartic ester component, which is a new type of amine / diamine functional coreactant for aliphatic polyisocyanate.
• Polyaspartic is actually an aliphatic polyurea because it is derived from the reaction product of an aliphatic polyisocyanate component and a polyaspartic ester component, which is a new type of amine / diamine functional coreactant for aliphatic polyisocyanate.
• For example, an alcohol R'- OH can be used to stop a reaction between a polyisocyanate and a polyol because it will react with the isocyanate functionality R-N = C = O to produce R-( N-H )-( C = O )-O-R'which is then no longer reactive with the polyol.