Detail of "18284-36-1"

Reference

Polymer hydrogenation

Polymer hydrogenation. Rempel, Garry Llewellyn; Azizian, Hormoz (Polysar Ltd., Can.). Eur. Pat. Appl. EP 111412 A1 20 Jun 1984, 27 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C08C019-02. APPLICATION: EP 83-307376 5 Dec 1983. PRIORITY: CA 82-417259 8 Dec 1982. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) The selective hydrogenation of C:C double bonds in a copolymer of a conjugated diene and 1 or more copolymerizable monomers at 40-170° and H pressure 0.05-7 mPa is carried out in the presence of (1) 0.05-20 wt.% of a catalyst having the formula RhH(L1)x, where x = 3-4 and L1 is a first ligand compd., (2) 1-25 wt.% of a second ligand compd. (L2) and (3) a solvent for the copolymer, catalyst, and L2, with the wts. of the complex and L2 being based on the wt. of the copolymer, in the which the catalyst/L2 wt. ratio is 0. to . L1 and L2 are the same or different P, As, or Sb compds. selected from 5-phenyl-5H-dibenzophosphole and compds. having the formula PR1R2R3, AsR1R2R3, and SbR1R2R3, where R1, R2, and R3 are independently selected from Me, Et, C6-10 aryl, and C7-12 aralkyl. The hydrogenated products are vulcanizable elastomers useful in applications requiring resistance to oxidizing conditions at elevated temps. for extended periods of time. Thus, Krynac rubber was dissolved in PhCl [108-90-7] and hydrogenated at H pressure 1.4-2.8 MPa at 87-130° in the presence of hydrotetrakis(triphenylphosphine)rhodium [18284-36-1] catalyst and Ph3P [603-35-0] ligand for 2-15.0 h. The hydrogenated product had degree of hydrogenation 51-99.95%.

Selective hydrogenation of carbon to carbon double bonds of a diene copolymer

Selective hydrogenation of carbon to carbon double bonds of a diene copolymer. Rempel, Garry Llewellyn; Azizian, Hormoz (Polysar Ltd., Can.). Fr. Demande FR 2540503 A1 10 Aug 1984, 16 pp. (French). (France). CODEN: FRXXBL. CLASS: IC: C08F236-04; C08F008-04; B01J031-18; B01J031-24. APPLICATION: FR 83-19327 2 Dec 1983. PRIORITY: CA 82-417260 8 Dec 1982. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) Section cross-reference(s): 67 Diene copolymers are hydrogenated, giving rubbers whose vulcanizates resist oxidn. at high temps. for long times, in org. solvents contg. the catalysts RhHLx (L = a ligand, x = 3 or 4). Thus, hydrogenation of nitrile rubber (34% nitrile, Krynack 34-50) as a 1.6% soln. in 10 mL PhCl contg. 25 mg (Ph3P)4RhH [18284-36-1] at 55°/0.09 MPa for 19 h gave 91% hydrogenation of double bonds.