Title:
蓋用密封材及びそれを用いた蓋の製造方法
Document Type and Number:
Japanese Patent JP4592306
Kind Code:
B2
Abstract:
A sealing gasket for closure, made of a polyurethane elastomer obtained by reacting the following (A), (B) and (C) :
(A) a polyisocyanate component having an isocyanate group content of 5 to 38% by weight and average 2 to 3 functional groups, obtained by modifying an aliphatic isocyanate and/or an alicyclic isocyanate,
(B) a polyol component having a hydroxyl value of 20 to 350 mgKOH/g and average 2 to 3 functional groups, and
(C) a glycerin fatty acid ester having hydroxyl group(s) ;
and a process for producing a closure using such a sealing gasket. The closure sealing gasket made of a polyurethane elastomer, obtained by the present invention, when used for a closure (e.g. a metal closure of a food container having good sealing properties), is little eluted, is less in swelling with an alcoholic beverage and less in the absorption of the odor of the alcoholic beverage into the closure sealing gasket, and is tough, and causes no yellowing.
Inventors:
Toshinori Moriga
Aoyama Naoki
Hiroe Yokota
Aoyama Naoki
Hiroe Yokota
Application Number:
JP2004075925A
Publication Date:
December 01, 2010
Filing Date:
March 17, 2004
Export Citation:
Assignee:
Toyo Seikan Co., Ltd.
Nihon Closure Co., Ltd.
Nippon Polyurethane Industry Co., Ltd.
Nihon Closure Co., Ltd.
Nippon Polyurethane Industry Co., Ltd.
International Classes:
B65D53/00; B65D53/06; C08G18/32; C08G18/36; C08G18/65; C08G18/79
Domestic Patent References:
| JP2002193315A | ||||
| JP58071156A | ||||
| JP2004075982A | ||||
| JP59204628A | ||||
| JP4298572A | ||||
| JP2002284219A | ||||
| JP2002265709A | ||||
| JP2004075071A | ||||
| JP2003205963A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Shiro Terasaki