METHOD OF PRODUCING POLYISOCYANATES CONTAINING ALLOPHANATE AND SILANE GROUPS Russian patent published in 2013 - IPC C08G18/78 C08G18/79 C08G18/32 C08G18/38 C07F7/10 C08G18/80 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyisocyanates which contain allophanate and silane groups by reacting (A) at least one hydroxy urethane or hydroxy amide, having silane groups, which is obtained by reacting aminosilanes with cyclic carbonates or lactones with molar excess relative to NCO reactive groups of component (A), (B) at least one diisocyanate with aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups, in the presence of a catalyst which speeds up formation of allophanate groups and, optionally, subsequent removal of unreacted excess diisocyanates. Polyisocyanates which contain allophanate and silane groups obtained using said method are also described.

EFFECT: obtaining polyisocyanates which contain allophanate and silane groups which also have high isocyanate functionality in each molecule yet also low viscosity, which improves operating properties of polyisocyanates, especially as cross-linking components in polyurethane lacquer and coatings.

13 cl, 10 ex