Polymer composition containing a fluorochemical oligomer
First Claim
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1. polymer composition comprising a thermoplastic or thermoset polymer and at least one fluorochemical oligomeric compound comprising:
- (iv) an oligomeric portion having both fluoroaliphatic and fluorine-free aliphatic pendent groups;
(v) an aliphatic moiety; and
(vi) a linking group which links the oligomeric portion to the aliphatic moiety, wherein the ratio of fluoroaliphatic pendent groups to fluorine-free aliphatic pendent groups is greater than or equal to 4.
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Abstract
The present invention provides a polymer composition comprising a fluorochemical oligomeric compound and a thermoplastic or thermoset polymer. The polymer composition is useful in preparing shaped articles such as fibers and films which have desirable oil- and water repellency properties.
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Citations
19 Claims
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1. polymer composition comprising a thermoplastic or thermoset polymer and at least one fluorochemical oligomeric compound comprising:
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(iv) an oligomeric portion having both fluoroaliphatic and fluorine-free aliphatic pendent groups;
(v) an aliphatic moiety; and
(vi) a linking group which links the oligomeric portion to the aliphatic moiety, wherein the ratio of fluoroaliphatic pendent groups to fluorine-free aliphatic pendent groups is greater than or equal to 4. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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3. The compounds of claim 2 wherein Rf has the structure CoF2o+1, where o is 4 to 14.
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4. The compounds of claim 2 wherein L is selected from the group of a covalent bond, straight chain, branched chain, or cyclic alkylene, arylene, aralkylene, oxy, oxo, hydroxy, thio, sulfonyl, sulfoxy, amino, imino, sulfonamido, carboxamido, carbonyloxy, urethanylene, ureylene, and combinations thereof.
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5. The compounds of claim 2 wherein L is chosen from the group consisting of a covalent bond,
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6. The compounds of claim 2 comprising oligomerized units of compounds of the formula
wherein R1, R2, Rf, Rh and Q are as defined in claim 2. -
7. The composition of claim 1 wherein said thermoplastic polymers are selected from the group consisting of polyamides, polyesters, polyurethanes, acrylates and polyolefins.
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8. The composition of claim 1 wherein said fluorinated oligomeric compound comprises from 0.5 to 5 weight percent of said composition.
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9. A shaped article comprising the composition of claim 1.
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10. The shaped article of claim 9 wherein said fluorinated oligomeric compound comprises from 10 to 10,000 ppm fluorine.
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11. The shaped article of claim 9 selected from the group of films, sheets and fibers.
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12. An oily mist resistant electret filter medium comprising polypropylene electret fibers comprising the composition of claim 1.
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13. The filter medium of claim 12 wherein said fibers have an effective fiber diameter of 2 to 30 micrometers.
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14. The filter medium of claim 13 wherein said fibers have been annealed.
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15. The filter medium of claim 13 wherein said filter media has a basis weight of 10 to 100 g/m2.
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16. The composition of claim 2 wherein Rh is a linear or branched alkyl group having from 18 to 60 carbon atoms.
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17. A fabric comprising the fibers of claim 11.
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18. A medical gown comprising the fabric of claim 17.
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19. The composition of claim 1 wherein said thermoset polymer is selected from polyurethanes, epoxy resins, epoxides and acrylates.
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Specification