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US 4,289,809 AGranted
Polydentate phosphonium salts useful in treating glass and capillary chromatographic columns
AssigneeSCM Corporation
InventorsSean G. Traynor, George Marcelin
Life of this patent
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Abstract
Polydentate phosphonium salts, prepared by reacting a polydentate phosphine containing two or more trivalent phosphorous atoms with various mono or difunctional organic halides, are effective agents for treating glass and specifically glass capillary chromatographic columns.
Claims12
Polydentate phosphonium salts comprising the reaction product of:
- (a) a polydentate phosphine containing two or more trivalent phosphorus atoms selected from the group consisting of:
- (1) R.sub.1 R.sub.2 PAPR.sub.1 R.sub.2 ;
- (2) (R.sub.1 R.sub.2 PA).sub.3 P;
- (3) [(R.sub.1 R.sub.2 PA).sub.3 P] (R.sub.1 R.sub.2 PA).sub.2 PR.sub.3 ;
- (4) (R.sub.1 R.sub.2 PA).sub.2 PAP(APR.sub.1 R.sub.2).sub.2 ;
- and ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different C.sub.1-20 alkyl radical, or an aromatic radical containing up to twelve carbon atoms and A represents a straight chain or branched lower alkylene radical containing from 2 to 6 carbons;
- n is an integer from 1 to 6;
- and
- (b) a mono or difunctional alkyl or aralkyl halide capable of forming a quaternary salt selected from the group consisting of (1) R.sub.4 X;
- (2) ArR.sub.5 X;
- (3) XR.sub.6 X;
- and (4) XCH.sub.2 ArCH.sub.2 X wherein X is halogen;
- R.sub.4 is an alkyl radical containing up to 20 carbon atoms;
- R.sub.5 is a lower alkylene radical containing 2 to 6 carbon atoms;
- Ar is a mono or divalent aryl radical which may contain one or more halogen ring substituents, provided that when the polydentate phosphine is R.sub.1 R.sub.2 PAPR.sub.1 R.sub.2, the halide used to form the quaternary salt must be a difunctional alkyl halide or an aralkyl halide.
12 more elements
Tetra(benzylbromide) salt of 1,1,4,7,10,10-hexaphenyl-1,4,7,10tetraphosphadecane.
Tetra(benzylbromide) salt of tris(2-diphenylphosphinoethyl)phosphine.
Tri(benzylbromide) salt of 1,1,4,7,7-pentaphenyl-1,4,7-triphosphaheptane.
A glass treating composition comprising:
- (a) an inert carrier, and
- (b) an effective amount of a surface deactivating quaternary salt of a polydentate phosphine selected from the group consisting of:
- 1,1,4,4-tetraphenyl 1,4-diphosphabutane;
- tris(2-diphenylphosphinoethyl)phosphine;
- 1,1,4,7,7-pentaphenyl-1,4,7-triphosphaheptane;
- and
- 1,1,4,7,10,10-hexaphenyl-1,4,7,10-tetraphosphadecane;
- provided that when a polydentate phosphine is 1,1,4,4-tetraphenyl 1,4-diphosphabutane the quaternary salt must be formed from a difunctional alkyl halide or an aralkyl halide.
5 more elements
Dependencies are inferred from the claim text.