Abstract:
A process for producing an aryloxy-substituted phosphazene derivative represented by the formula(N.dbd.P).sub.n (OAr).sub.l Cl.sub.m-l R.sup.1.sub.p (III)which comprises reacting a chlorophosphazene derivative represented by the general formula(N.dbd.P).sub.n Cl.sub.m R.sup.1.sub.p (I)with, a hydroxy aryl compound represented by the general formulaHOAr (II)whereR.sup.1 represents hydroxy group, NH.sub.2 group, --OR.sup.4 group, --SR.sup.4 group or ##STR1## group, where R.sup.4, R.sup.5 and R.sup.6 represent independently an alkyl group, an alkenyl group, alkynyl group or an aryl group or one of R.sup.5 or R.sup.6 may be hydrogen or R.sup.5 and R.sup.6 may form, together with a nitrogen atom bonded thereto, a saturated or an unsaturated heterocyclic ring,n is an integer of 3 to 20,m is an integer of 1 to 2n,p is 2n-m,Ar represents substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, or substituted or unsubstituted N-maleimidophenyl,l is an integer of 1 to m,wherein the reaction is carried out under the presence of an acid acceptor and a pyridine derivative represented by the formula ##STR2## where Q.sup.1 and Q.sup.2 represent identical or different lower alkyl groups or constitute together with a nitrogen atom bonded thereto, a pyrrolidine ring, piperidine ring or morpholine ring.
Abstract:
A PHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL COMPRISING A SILVER HALIDE EMULSION LAYER CONTAINING A COMPOUND CORRESPONDING TO ONE OF THE FOLLOWING STRUCTURAL FORMULAE IA OR IB:
EACH OF A1, A2, A3, A4, Z1, Z2, Z3, AND Z4 STANDS FOR A CHLORINE ATOM OR A POLYOXYALKYLENE GROUP OF THE FORMULA -(OR1)N-X, AT LEAST ONE OF THE GROUPS A1, A2, A3, A4, Z1, Z2, Z3, OR Z4 BEING THE GROUP -(OR1)N-X WHEREIN N REPRESENTS AN INTEGER OF AT LEAST 5, THE
-(OR1)-
GROUP REPRESENTING REPEATING UNITS ENTIRELY CONSISTING OF ETHYLENE OXIDE UNITS OR A MIXTURE OF ETHYLENE OXIDE UNITS AND PROPYLENE OXIDE UNITS, AND X BEING A TERMINAL GROUP THAT IS UNREACTIVE WITH RESPECT TO AN ACTIVE HALOGEN ATOM OF AN ACID HALIDE COMPOUND AND IS SELECTED FROM THE GROUP CONSISTING OF
-O-R, -OOC-R, -S-R, OR -N(-R)2
WHEREIN R IS AN ALKYL, AN ARYL, A CYCLOALKYL, OR A HETEROCYCLIC RADICAL, SAID RADICALS BEING UNREACTIVE WITH RESPECT TO SAID ACTIVE HALOGEN ATOM IS DESCRIBED. THE SILVER HALIDE EMULSION HAS A HIGH DEVELOPING ACTIVATION IN COMBINATION WITH A VERY LOW FOG PRODUCTION.
Abstract:
The oxidation resistance of a cyclophosphazene-based fluid (such as a lubricant or a hydraulic fluid) can be improved by the addition to the fluid of an oxidation-inhibiting amount of an aryl phosphine or phosphine oxide. The aryl phosphine or phosphine oxide is preferably present in an amount of about 0.01 to about 5 percent by weight. The aryl phosphine or phosphine oxide can be (a) a symmetric triarylphosphine of formula R.sub.3 P, wherein R is 4-trifluoromethyl phenyl, 3-trifluoromethyl phenyl, 3-trifluoromethoxy phenyl, 3-(3-trifluoromethylphenoxy) phenyl, 3-(perfluoro-2, 5-dimethyl-3, 6-dioxanonyl) phenyl or 1-naphthyl; (b) an oxide of any of these symmetric triarylphosphines; or (c) 1, 3-bis(diphenylphosphino) benzene. The cyclophosphazene fluid component is preferably a (fluorinated phenoxy) (3-perfluoroalkylphenoxy)-cyclic phosphazene of the general formula (I): ##STR1## wherein n is 3 to 7, inclusive; wherein R is individually in each occurrence fluorinated phenoxy or 3-perfluoroalkylphenoxy; and wherein the ratio of fluorinated phenoxy to 3-perfluoroalkylphenoxy is about 1:5 to 1:1 inclusive. Although useful as antioxidants in other fluids such as polyphenyl ethers, perfluorinated aliphatic polyethers and polyol esters, the antioxidant activity of the defined aryl phosphines and phosphine oxides in cyclophosphazene fluids is unexpected because of the significant difference in the pathways of oxidative degradation between the cyclophosphazenes and these other fluids.