Document Type and Number:
Japanese Patent JPS4830708
Kind Code:
A
Abstract:
1402094 Hydrogenated SBR SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 21 Aug 1972 [23 Aug 1971] 39348/71 Heading C3P [Also in Division C5] A lubricant additive is provided by hydrogenating a butadiene/styrene random copolymer until 5-95% of its olefinic double bonds have been removed. Many suitable catalysts are listed the copolymer may be nydrogenated in solution in an inert solvent such as a saturated hydrocarbon. In an example, a solution of copolymer in a mixture of hexane and cyclohexane (the preparation reaction mixture) is hydrogenated at 20‹ C. and 40 kg./cm.2 using, as catalyst, a mixture of nickel 2-ethylhexanoate and aluminium triethyl in cyclohexane. Hydrogenation is stopped at 89À6% by releasing the pressure and deactivating the catalyst by adding aqueous HCl and methanol. In a comparative example, hydrogenation is continued to 98À0% removal of olefinic bonds.
Application Number:
JP8288272A
Publication Date:
April 23, 1973
Filing Date:
August 21, 1972
Export Citation:
International Classes:
C10M143/12; C10M161/00; C10M163/00; C10N30/02; C10N30/04; C10N40/25; C10N60/02; (IPC1-7): C10M1/18
Domestic Patent References:
| JP33001798A | ||||
| JPS466514A | ||||
| JPS4725207A |
Foreign References:
| US3554911A | 1971-01-12 |