Patent ID: 7288213

Claim:
A process for preparing a tricondensate polyfunctional isocyanate composition, comprising: A) the following step a) and b) in any order: a) (cyclo)condensing one or more identical or different first isocyanate monomer(s) to obtain a tricondensate polyfunctional isocyanate reaction product; b) reacting one or more second isocyanate monomer(s) which are identical to or different from one another and identical to or different from the first isocyanate monomer(s), the second monomer(s) being linear alkyl isocyanate monomer(s), with C 4 -C 8 linear alkyl alcohol(s) to obtain an allophanate of one or more identical or different isocyanates, or a mixture of different allophanates; B) step c) and d) in any order: c) adding the reaction product from step b) to the reaction product from step a), and optionally, d) removing the isocyanate monomer(s), and C) obtaining a low-viscosity tricondensate polyfunctional isocyanate composition, wherein said composition comprises less than 2% of tricondensate allophanate relative to the total weight of the composition.