Fluorinated phosphates as surface active agents
AssigneeE. I. Du Pont de Nemours and Company
InventorsSHENG PENG, ALLISON MARY YAKE, XIANJUN MENG
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Abstract
An improved method for lowering the surface tension of coating compositions wherein a surfactant is contacted with the coating composition, wherein the improvement comprises contacting said coating composition with a surfactant having mono-substituted fluorophosphates present at greater than or equal to 50 mol % than bis-substituted phosphates and substrates treated with the coating composition.
Claims20
An improved method for lowering the surface tension of coating compositions wherein a surfactant is contacted with said coating composition, wherein the improvement comprises contacting said coating composition with a surfactant comprising formula I and formula II
- (RfAO)P(O)(O−M+)2 (formula I)
- and (RfAO)2P(O)(O−M+) (formula II)
- wherein
- Rf is a C1 to C6 linear or branched perfluoroalkyl optionally interrupted by one, two or three ether oxygen atoms;
- A is (CH2CF2)m(CH2)n, (CH2)oSO2N(CH3)(CH2)p, O(CF2)q(CH2)r, or OCHFCF2OE;
- m is 0 to 4;
- n, o, p, and r are each independently 2 to 20;
- q is 2;
- E is a C2 to C20 linear or branched alkyl group optionally interrupted by oxygen, sulfur, or nitrogen atoms;
- a cyclic alkyl group, or a C6 to C10 aryl group;
- M is a Group I metal or an ammonium cation (NHxR2y)+ wherein R2 is a C1 to C4 alkyl;
- x is 1 to 4;
- y is 0 to 3;
- and x+y is 4;
- and
- wherein formula (I) is present at greater than or equal to 50 mol %.
A method of increasing contact angle of a coating composition applied to a surface comprising contacting the surface with a coating composition comprising formula I and formula II
- (RfAO)P(O)(O−M+)2 (formula I)
- and (RfAO)2P(O)(O−M+) (formula II)
- wherein
- Rf is a C1 to C6 linear or branched perfluoroalkyl optionally interrupted by one, two or three ether oxygen atoms;
- A is (CH2CF2)m(CH2)n, (CH2)oSO2N(CH3)(CH2)p, O(CF2)q(CH2)r, or OCHFCF2OE;
- m is 0 to 4;
- n, o, p, and r are each independently 2 to 20;
- q is 2;
- E is a C2 to C20 linear or branched alkyl group optionally interrupted by oxygen, sulfur, or nitrogen atoms;
- a cyclic alkyl group, or a C6 to C10 aryl group;
- M is a Group I metal or an ammonium cation (NHxR2y)+ wherein R2 is a C1 to C4 alkyl;
- x is 1 to 4;
- y is 0 to 3;
- and x+y is 4;
- and
- wherein formula (I) is present at greater than or equal to 50 mol %.
A method for imparting surface effects to substrates comprising contacting all or a portion of a surface of the substrate with a coating composition containing a surfactant comprising formula I and formula II
- (RfAO)P(O)(O−M+)2 (formula I)
- and
- (RfAO)2P(O)(O−M+) (formula II)
- wherein
- Rf is a C1 to C6 linear or branched perfluoroalkyl optionally interrupted by one, two or three ether oxygen atoms;
- A is (CH2CF2)m(CH2)n, (CH2)oSO2N(CH3)(CH2)p, O(CF2)q(CH2)r, or OCHFCF2OE;
- m is 0 to 4;
- n, o, p, and r are each independently 2 to 20;
- q is 2;
- E is a C2 to C20 linear or branched alkyl group optionally interrupted by oxygen, sulfur, or nitrogen atoms;
- a cyclic alkyl group, or a C6 to C10 aryl group;
- M is a Group I metal or an ammonium cation (NHxR2y)+, wherein R2 is a C1 to C4 alkyl;
- x is 1 to 4;
- y is 0 to 3;
- and x+y is 4;
- and wherein formula I is present at greater than or equal to 50 mol %.
Dependencies are inferred from the claim text.