Title:
DECOMPOSITION METHOD FOR CROSSLINKED RUBBER
Document Type and Number:
WIPO Patent Application WO/2023/153380
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a decomposition method for crosslinked rubber that improves the yield of a monomer. According to the present invention, a decomposition method for crosslinked rubber is characterized by including a first decomposition step for using a catalyst represented by general formulas (1)–(3) to decompose a crosslinked rubber that contains a diene rubber (in the formulas, M is ruthenium, molybdenum, or the like, X1, X2, L1, L2, and L3 each independently represent a ligand, R1, R2, and R3 each independently represent hydrogen, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, or the like (and those groups may be substituted with one or more alkyl groups, halogens, alkoxy groups, or the like), and L1 and L2, R1 and R2, and L1 and R1 may be bonded to each other to form a ring) and a second decomposition step for thermally decomposing the decomposition product of the first decomposition step at 600°C–950°C in an inert gas atmosphere and in the absence of a catalyst.
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Inventors:
HOJO MASAHIRO (JP)
OKUNO AKIRA (JP)
KUNO MARINO (JP)
YOSHIOKA TOSHIAKI (JP)
KUMAGAI SHOGO (JP)
FUKAYA NORIHISA (JP)
WAHYU SATPRIYO PUTRO (JP)
CHOI JUN-CHUL (JP)
MIFTAH FARIED (JP)
YAMASHITA HIROSHI (JP)
FUJITANI TADAHIRO (JP)
HATORI MAKIKO (JP)
SUGIKI MAKOTO (JP)
OKUNO AKIRA (JP)
KUNO MARINO (JP)
YOSHIOKA TOSHIAKI (JP)
KUMAGAI SHOGO (JP)
FUKAYA NORIHISA (JP)
WAHYU SATPRIYO PUTRO (JP)
CHOI JUN-CHUL (JP)
MIFTAH FARIED (JP)
YAMASHITA HIROSHI (JP)
FUJITANI TADAHIRO (JP)
HATORI MAKIKO (JP)
SUGIKI MAKOTO (JP)
Application Number:
PCT/JP2023/003875
Publication Date:
August 17, 2023
Filing Date:
February 06, 2023
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
UNIV TOHOKU (JP)
AIST (JP)
UNIV TOHOKU (JP)
AIST (JP)
International Classes:
C08J11/18; B01J31/22; B01J31/24; C08C19/08; C08J11/12
Domestic Patent References:
| WO2014148612A1 | 2014-09-25 |
Foreign References:
| CN110922510A | 2020-03-27 | |||
| US5446102A | 1995-08-29 | |||
| US20060116431A1 | 2006-06-01 | |||
| JP2009106929A | 2009-05-21 | |||
| JPH07316227A | 1995-12-05 |
Other References:
SMITH R. F., BOOTHROYD S. C., THOMPSON R. L., KHOSRAVI E.: "A facile route for rubber breakdown via cross metathesis reactions", GREEN CHEMISTRY, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 18, no. 11, 3 March 2016 (2016-03-03), GB , pages 3448 - 3455, XP093083687, ISSN: 1463-9262, DOI: 10.1039/C5GC03075G
CRAIG S.W., MANZER J.A., COUGHLIN E.B.: "Highly efficient acyclic diene metastasis depolymerization using a ruthenium catalyst containing a N-heterocyclic carbene ligand", MACROMOLECULES, AMERICAN CHEMICAL SOCIETY, US, vol. 34, 6 November 2001 (2001-11-06), US , pages 7929 - 7931, XP002586803, ISSN: 0024-9297, DOI: 10.1021/ma011188p
SADAKA FATEN; CAMPISTRON IRÈNE; LAGUERRE ALBERT; PILARD JEAN-FRANÇOIS: "Telechelic oligomers obtained by metathetic degradation of both polyisoprene and styrene–butadiene rubbers. Applications for recycling waste tyre rubber", POLYMER DEGRADATION AND STABILITY, BARKING, GB, vol. 98, no. 3, 28 December 2012 (2012-12-28), GB , pages 736 - 742, XP028577456, ISSN: 0141-3910, DOI: 10.1016/j.polymdegradstab.2012.12.018
CRAIG S.W., MANZER J.A., COUGHLIN E.B.: "Highly efficient acyclic diene metastasis depolymerization using a ruthenium catalyst containing a N-heterocyclic carbene ligand", MACROMOLECULES, AMERICAN CHEMICAL SOCIETY, US, vol. 34, 6 November 2001 (2001-11-06), US , pages 7929 - 7931, XP002586803, ISSN: 0024-9297, DOI: 10.1021/ma011188p
SADAKA FATEN; CAMPISTRON IRÈNE; LAGUERRE ALBERT; PILARD JEAN-FRANÇOIS: "Telechelic oligomers obtained by metathetic degradation of both polyisoprene and styrene–butadiene rubbers. Applications for recycling waste tyre rubber", POLYMER DEGRADATION AND STABILITY, BARKING, GB, vol. 98, no. 3, 28 December 2012 (2012-12-28), GB , pages 736 - 742, XP028577456, ISSN: 0141-3910, DOI: 10.1016/j.polymdegradstab.2012.12.018
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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