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Patent Searching and Data


Title:
MOISTURE-PERMEABLE POLYURETHANE RESIN FILM
Document Type and Number:
Japanese Patent JPH03203920
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject film excellent in moisture-permeability, resistance to water-swelling, etc., by using a specified polyol in production of a polyurethane resin film by a reaction between the polyol and a polyisocyanate. CONSTITUTION:A polyol composed of a random copolymer (preferably 600-3000 molecular weight) prepared by copolymerization of ethylene oxide and tetrahydrofuran in a molar ratio of (40/60)-(80/20) is reacted with a polyisocyanate (preferably 4,4'-diphenylmethane diisocyanate, etc.) preferably in an equivalent ratio of (NCO/OH)=0.9-1.1 in the presence of a chain- lengthening agent such as ethylene glycol and the resultant polyurethane resin is subjected to film forming, thus obtaining the objective film having preferably 20mum thickness, >=2000 moisture permeability and <=5 degree of swelling with water.

Inventors:
ICHIHARA MISAO
KONDO ISAO
NIIKE YOSHIO
NAKAMURA SUSUMU
Application Number:
JP34297889A
Publication Date:
September 05, 1991
Filing Date:
December 29, 1989
Export Citation:
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Assignee:
DAINICHISEIKA COLOR & CHEM MFG CO LTD
UKIMA CHEM & COLOUR MFG CO LTD
International Classes:
C08J5/18; C08G18/48; C08L75/04; (IPC1-7): C08G18/48; C08J5/18; C08L75/04
Domestic Patent References:
JPS649213A1989-01-12