Practical synthesis of phosphonium salts with orthoformates and their application as flame retardants in polycarbonate
An efficient and practical approach to phosphonium salts has been developed. By the reaction of phosphines and different acid sources with orthoformates in one-step operation, the process allowed rapid access to phosphonium salts with diverse counterions in high yield after the purification by recrystallization. The flame retardant performance in PC has also been examined by blending several phosphonium salts to PC respectively. Phosphonium phosphates showed excellent flame retardancy in PC with only 2 phr blending.
A two-step pathway for preparing high pure quaternary phosphonium salts is disclosed. In the first step, hydrogen phosphide (PH3) or a higher phophine reacts with a protonic compound to produce a phosphonium salt, which then reacts with a carbo
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Paragraph 0033
(2015/06/24)
A simple access to metallic or onium bistrifluoromethanesulfonimide salts
Numerous salts of the (CF3SO2)2N- anion, called TFSI, were prepared according to an original one-pot procedure. First, N-benzyl trifluoromethanesulfonimide (N-benzyl triflimide) was treated with ethanol to form
Arvai, Roman,Toulgoat, Fabien,Langlois, Bernard R.,Sanchez, Jean-Yves,Médebielle, Maurice
experimental part
p. 5361 - 5368
(2009/12/01)
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