Title:
PRODUCTION OF POLYURETHANE AND/OR POLYUREA MOLDING EXCELLENT IN SELF-RELEASABILITY
Document Type and Number:
Japanese Patent JP3146462
Kind Code:
B2
Abstract:
PURPOSE: To obtain a molding having good mold release properties and coatability and suffering little bleeding with time, by incorporating a specified aliphatic ketone when producing polyurethane and/or polyurea moldings by reaction injection molding from an organic polyisocyanate, etc., as raw materials.
CONSTITUTION: A process for producing polyurethane and/or polyurea moldings by reaction injection molding from a liquid polyol mixture consisting of an organic polyisocyanate, a polyol, a polyamine, a chain extender, an internal mold release agent, other auxiliaries, etc., wherein a 10-50C aliphatic symmetric ketone or a 10-25C aliphatic asymmetric ketone is used as the internal mold release agent in an amount of 0.05-10wt.% based on the polyol mixture. As the polyol, a polyether polyol obtained by the addition polymerization of a cyclic ether having a functionality of 2 to 3 is preferably used. Examples of the ketone compounds include di-n-hexyl ketone, di-n-heptadecyl ketone, etc., and methyl n-nonyl ketone, 2,4-octadecyldione, etc. This polyurethane and/or polyurea molding process is excellent in releasability from a metal mold and gives a molding having good physical properties and coatability.
Inventors:
Hirohide Yokota
Mitsunari Ikemoto
Masuko
Kazuki Sasaki
Hachiro Wada
Mitsunari Ikemoto
Masuko
Kazuki Sasaki
Hachiro Wada
Application Number:
JP35564291A
Publication Date:
March 19, 2001
Filing Date:
December 24, 1991
Export Citation:
Assignee:
Nippon Polyurethane Industry Co., Ltd.
International Classes:
B29C45/00; C08G18/08; C08G18/09; C08K5/07; C08L75/00; (IPC1-7): C08L75/00; C08G18/09; C08K5/07
Domestic Patent References:
| JP337216A | ||||
| JP5947237A |
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