POLYURETHANE PARTICLES AND METHOD FOR PRODUCING POLYURETHANE PARTICLE CLUSTER

Title:

POLYURETHANE PARTICLES AND METHOD FOR PRODUCING POLYURETHANE PARTICLE CLUSTER

Document Type and Number:

WIPO Patent Application WO/2010/064698

Kind Code:

A1

Abstract:

Provided are polyurethane particles that can absorb oil such that the particles themselves are unlikely to fuse or aggregate together during production, handling, storage or transportation, as well as a method for producing these polyurethane particles. The polyurethane particles are formed from a polyurethane particle body and a hydrophilic silica micropowder cluster that coats the surface of the particle body. The polyurethane particle body is obtained by subjecting an isocyanate-terminal urethane prepolymer obtained by reacting a polyisocyanate component and a polyol component containing polytetramethylene glycol to three-dimensional polymerization in the presence of a polyfunctional amine having three or more functional groups. The polyurethane particle cluster is obtained by using a spray dryer to spray dry an aqueous mixed dispersion in which a hydrophilic silica micropowder cluster and a polyurethane spherical body cluster obtained by the above-mentioned three-dimensional polymerization are dispersed in water.

Inventors:

ORIGUCHI TOSHIKI (JP)
NAKAYAMA YOSHITAKA (JP)

Application Number:

PCT/JP2009/070378

Publication Date:

June 10, 2010

Filing Date:

December 04, 2009

Export Citation:

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Assignee:

KONISHI CO LTD (JP)
ORIGUCHI TOSHIKI (JP)
NAKAYAMA YOSHITAKA (JP)

International Classes:

C08J3/12; A61K8/87; A61Q13/00; B01J2/00; B01J2/04; B01J20/26; C08G18/10; C08G18/48; C09K3/00; A61L9/01

Foreign References:

JP2006321830A	2006-11-30
JPH1067958A	1998-03-10
JP2004176066A	2004-06-24
JPH0641419A	1994-02-15
JP2009029867A	2009-02-12
JP2006008757A	2006-01-12

Other References: