Back to results
US 5,473,091 AGranted
Quaternary phosphorus compounds and their preparation
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsNobuhiro Ichiroku, Koji Futatsumori, Kazuhiro Arai, Miyuki Wakao, Toshio Shiobara
Life of this patent
Estimating the term…
Abstract
A novel quaternary phosphorus compound is a salt between tetraphenyl borate and a phosphonium having an aromatic group attached to a phosphorus atom through an oxygen atom. It is blended with an epoxy resin as a curing catalyst to form an epoxy resin composition which flows smoothly and quickly cures into a product having improved moisture resistance and adhesion.
Claims1
A quaternary phosphorus compound of the following general formula (1):
- ##STR13## wherein R.sup.1 is a group of the following formula (2):
- ##STR14## R.sup.2 is a group of the following formula (3) or (4):
- ##STR15## n is an integer of 1 to 4, R.sup.3 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, and
- m is an integer of 0 to 3, with the proviso that in formula (4) when m is at least 1, R.sup.3 may be attached to either one or both of the aromatic ring having --O-- and the aromatic ring free of --O--.
1 more element
Dependencies are inferred from the claim text.