Title:
PROCESS FOR PRODUCING POROUS OBJECT
Document Type and Number:
WIPO Patent Application WO/2001/064998
Kind Code:
A1
Abstract:
A process in which a porous object having interconnected cells which is similar to ones obtained by conventional methods using an organic solvent is formed from a solvent-free system containing a polyurethane resin emulsion without using any organic solvent. The process comprises: solidifying, with moistening and heating, either a polyurethane resin emulsion containing a highly crystalline substance formed from diphenylmethane diisocyanate (MDI) and a low-molecular diol or a polyurethane resin emulsion obtained by conducting polycondensation in the presence of the highly crystalline substance as nuclei; and then drying it to remove the water therefrom. Thus, a porous object for use as an artificial leather is produced in which the parts where the water was present constitute interconnected cells.
Inventors:
Honjo, Akira (Matsumoto Yushi-Seiyaku Co. Ltd, 1-3, Shibukawa-cho 2-chom, Yao-shi Osaka, 581-0075, JP)
Application Number:
PCT/JP2001/000888
Publication Date:
September 07, 2001
Filing Date:
February 08, 2001
Export Citation:
Assignee:
MATSUMOTO YUSHI-SEIYAKU CO., LTD. (1-3 Shibukawa-cho 2-chome, Yao-shi, Osaka, 581-0075, JP)
Honjo, Akira (Matsumoto Yushi-Seiyaku Co. Ltd, 1-3, Shibukawa-cho 2-chom, Yao-shi Osaka, 581-0075, JP)
Honjo, Akira (Matsumoto Yushi-Seiyaku Co. Ltd, 1-3, Shibukawa-cho 2-chom, Yao-shi Osaka, 581-0075, JP)
International Classes:
C08G18/12; C08G18/28; C08G18/32; C08G18/48; C08G18/66; C08J9/00; C08J9/28; C09D175/08; D06N3/14; (IPC1-7): D06N3/14
Attorney, Agent or Firm:
Miyakoshi, Noriaki (Shin-ei Patent Office, 29th floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, 107-6029, JP)
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