Title:
ゴム脱硫
Document Type and Number:
Japanese Patent JP2010535913
Kind Code:
A
Abstract:
The present invention relates to a method for preferentially breaking cross-links in a vulcanized rubber, thereby de-vulcanizing the rubber, by the use of a supercritical fluid, such as carbon dioxide The supercritical fluid causes swelling of the said vulcanized rubber material, wherein the time of swelling is not more than 50% of the time required for full volume equilibrium swelling of the rubber in said supercritical fluid and the swelling is followed by a rapid reduction of the supercritical fluid pressure The cross links (3) become fully extended and under strain to hold the internal pressures caused by the solvent swelling affect of the supercritical gas When equilibrium swell has been achieved, the pressure within the processing vessel is rapidly dropped to a predetermined level causing a degassing and expansion of the supercritical fluid that has been absorbed within the vulcanized rubber The resulting three dimensional separation of the rubber molecules will put a further rapid strain on the cross links, causing them to break (7), thereby giving the affect of de-vulcanization.
Inventors:
Dies, Mikel, Yang
Hugh, philip, james
Hugh, philip, james
Application Number:
JP2010520482A
Publication Date:
November 25, 2010
Filing Date:
August 12, 2008
Export Citation:
Assignee:
DSM IP ASSETS B.V.
Lubber-Liegen LLP
Lubber-Liegen LLP
International Classes:
C08C19/00; C08J11/16; C08J11/18
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu
Ikeda adult
Masakazu Noda
Yoshinori Shimizu
Ikeda adult