Process for preparing aqueous dispersions of hybrid...

Details Process for preparing aqueous dispersions of hybrid... Process for preparing aqueous dispersions of hybrid...

2005-06-28

2005-06-28

Sergent, Rabon (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S457000, C524S500000, C524S507000, C525S123000, C525S127000, C525S131000, C525S455000, C525S902000

Reexamination Certificate

active

06911487

ABSTRACT:
Dispersions of hybrid polyurethane particles are made using miniemulsion techniques. An isocyanate-terminated prepolymer and a monomer are mixed and dispersed in an aqueous phase to form a dispersion of droplets. All droplets are polymerized and chain-extended in one step to form hybrid particles containing a polyurethane and a polymer of the monomer. This process provides a simple method of making hybrid particles, in which particle size and the number of particles is controlled in the mixing step. The hybrid particles often have a core-shell morphology, with the polyurethane being concentrated in the shell and the polymer being concentrated in the center of the particle.

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