Patent ID: 8173742
Filing Date: 2012-05-08
Classification: C07F

Abstract:
1. A polyisocyanate composition comprising at least two different oligomeric compounds A and B, where A comprises at least two aminoalkylsilane units and compound B comprises at least two diamino units, in which said oligomeric compounds each comprises (I) at least three and at most five units selected from the group consisting of aminoalkylsilane and diamine functional groups and (II) at least one functional group selected from the group consisting of isocyanate functional groups and derivatives of isocyanate functional groups, wherein said derivative is a carbamate, uretidinedione, isocyanurate, biuret, allophanate, 4,6-dioxo-2-iminohexahydro-1,3,5-triazine, iminooxadiazinedione or 2-imino-4-oxo-1,3-diazetidine functional group, wherein the aminoalkylsilane unit is derived from a compound of formula I: wherein: m and n individually are 0, 1, 2 or 3 with proviso that m+n=3; R R R X═O or S, said composition having a viscosity of at most 6000 mPa·s and an amount of isocyanate monomer being at most 2% by weight of the composition.