Process for the preparation of polyurethane spherical particle

Details Process for the preparation of polyurethane spherical particle Process for the preparation of polyurethane spherical particle

1998-08-28

2000-09-26

Nutter, Nathan M.

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

42721331, 42721334, 42721336, 42840221, 264 41, 264 433, 264 47, B01J 1302, B05D 700, B32B 1502

Patent

active

061239887

ABSTRACT:
This invention relates to the process for the preparation of polyurethane with controlled particle size and shape. More, particularly it relates to the production of polyurethane microspheres from a diol and diisocyanate by dispersion polymerization in presence of a steric stabilizer and a catalyst in an organic solvent at a controlled temperature, and finally separating the spherical polyurethane particles from the reaction mixture by conventional means.

REFERENCES:
patent: 5911923 (1999-06-01), Work et al.

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