Patent ID: 6649706
Filing Date: 2003-11-18
Classification: C08G,C09D

Abstract:
A thixotropic agent comprising a reaction product of an isocyanato-containing compound and an amine,wherein the amine comprises at least one of a primary amine and a secondary amine, and optionally wherein the amine further comprises water, wherein the isocyanato-containing compound comprises at least one of Ia) at least one isocyanate containing at least one diisocyanate structural unit that i) has a ring structure containing 5-10 ring atoms, wherein the ring structure is one of unsaturated/aromatic and non-aromatic, and ii) has two isocyanate groups attached to the ring structure, iii) wherein when the ring structure is the non-aromatic ring structure, at least one of a) both isocyanate groups are attached to the ring structure via at least one of linear C1-C9 alkyl and linear C2-C10 ether alkyl, and b) one isocyanate group is attached directly to the ring structure and the other is attached via one of linear C2-C9 alkyl and linear C2-C10 ether alkyl, and iv) wherein when the ring structure is the unsaturated/aromatic ring structure, at least one of the two isocyanate groups is attached to the ring structure via at least one of linear C2-C9 alkyl and linear C2-C10 ether alkyl, neither the linear C2-C9 alkyl nor the linear C2-C10 ether alkyl contain benzylic hydrogen atoms; Ib) at least one oligomer of the isocyanate Ia) containing from 2 to 10 isocyanate units; â€ƒand Ic) at least one of a partially blocked isocyanate Ia) and a partially blocked oligomer Ib).