Patent ID: 6506832
Filing Date: 2003-01-14
Classification: C08G

Abstract:
A process for the preparation of aqueous emulsions of (poly)isocyanate comprising blending a mixture of:a. 100 parts by weight of a (poly)isocyanate (A) having a dynamic viscosity of at least about 3 Pa s at 25Â° C.; b. 2 to 20 parts by weight of water; and c. 3 to 20 parts by weight of a surface-active agent (B); wherein said surface-active agent exhibits an HLB of at least 10 and the relative quantities of water and constituent (B) being such that the viscosity of the mixture of water and surface-active agent (B) is at least about one tenth of the viscosity of the (poly)isocyanate (A); and wherein said blending is carried out over a period and in shear conditions sufficient to obtain an oil-in-water emulsion with a particle size of about 0.1 to 5 micrometers.