Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Nitrogen compound containing
Patent
1998-12-18
2000-04-11
Wood, Elizabeth
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Nitrogen compound containing
502208, 502214, 502226, 502162, 502167, 502169, 502172, 528 12, 528 23, B01J 2724, B01J 2714, B01J 27138, B01J 3100, C08G 7706
Patent
active
060488190
ABSTRACT:
A catalyst composition for use in the preparation of an organopolysiloxane comprises a .gamma.-butyrolactone carrier and a phosphonitrile catalyst. Preferred phosphonitrile catalysts comprise Cl.sub.3 PNPCl.sub.2 NPCl.sub.3.PCl.sub.6, (Cl.sub.3 P.dbd.N--(PCl.sub.2 .dbd.N).sub.d --PCl.sub.3).sup.+ (SbCl.sub.6).sup.- wherein d is 1 to 4, and compounds of the formula Y(PX.sub.2 .dbd.N).sub.a PX.sub.2 O) wherein X is chlorine, hydroxyl or an organosilicon radical bonded to phosphorous via oxygen, and a is 1 to 5. Also disclosed is a method for producing an organopolysiloxane by polymerisation reaction in the presence of a said catalyst composition, and use of .gamma.-butyrolactone as a carrier for a phosphonitrile catalyst in the preparation of an organopolysiloxane.
REFERENCES:
patent: 3549680 (1970-12-01), Wegehaupt et al.
patent: 3839388 (1974-10-01), Hitzsche et al.
patent: 4902813 (1990-02-01), Wegehaupt et al.
patent: 5008229 (1991-04-01), Schuster et al.
patent: 5210129 (1993-05-01), Habimana et al.
patent: 5210131 (1993-05-01), Gilson et al.
patent: 5380902 (1995-01-01), Hager et al.
patent: 5408025 (1995-04-01), Thompson et al.
patent: 5424385 (1995-06-01), Hager et al.
patent: 5484871 (1996-01-01), Stepp
patent: 5502143 (1996-03-01), Oie et al.
patent: 5510441 (1996-04-01), Razzano
patent: 5534608 (1996-07-01), Thompson et al.
patent: 5919883 (1999-07-01), Dittrich et al.
Dow Corning Ltd.
Fletcher Melvin D.
Hailey Patricia L.
Wood Elizabeth
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