Title:
GASKET MATERIAL
Document Type and Number:
Japanese Patent JP3687255
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a gasket material which is excellent in the uniformity of surface pressure by forming an org.-peroxide-cured foamed rubber sheet contg. microcapsular foamed particles from an unvulcanized compsn. of EPDM contg. propylene units and dicyclopentadiene units each in a specified content.
SOLUTION: This gasket material is prepd. by forming, on at least one side of a metal sheet, a foamed rubber layer contg. microcapsular foamed particles which are thermally expanded with a low-boiling hydrocarbon blowing agent (e.g. isobutane) at about 120-200°C. A sheet of an unvulcanized compsn. of EPDM contg. 25-45wt.% propylene units and 8-26wt.% dicyclopentadiene units in a thickness of about 0.05-0.5mm is stuck to an adhesive-coated metal sheet. The compsn. contains about 5-50 pts.wt. microcapsular particles, about 0.5-15 pts.wt. org peroxide (e.g. benzoyl peroxide), a filler, etc., based on 100 pts.wt. EPDM. The sheet of the compsn. stuck to the metal sheet is heated, vulcanized, and foamed, thus giving a laminate.
Inventors:
Toshihiro Tora
Takeshi Toyoda
Takeshi Toyoda
Application Number:
JP6013397A
Publication Date:
August 24, 2005
Filing Date:
February 28, 1997
Export Citation:
Assignee:
NOK CORPORATION
International Classes:
C09K3/10; (IPC1-7): C09K3/10
Domestic Patent References:
| JP7286165A | ||||
| JP7138429A | ||||
| JP4293936A | ||||
| JP4341986A | ||||
| JP8218057A | ||||
| JP3229069A |
Attorney, Agent or Firm:
Toshio Yoshida
Previous Patent: SEMICONDUCTOR LASER DEVICE AND ITS MANUFACTURE
Next Patent: ELEMENT REPLACEMENT TYPE FILTER
Next Patent: ELEMENT REPLACEMENT TYPE FILTER