Blends of fluoroalkyl-containing ester oligomers with polydicarbodiimide(S)

摘要

For imparting enhanced water-repellency and oil-repellency properties to substrates compositions comprising blends of (A) one or more ester oligomers and (B) one or more polycarbodiimides. Also methods for applying such compositions and articles treated with such compositions.

主权项

1. A composition comprising a blend of:
(A) 50-90 wt-% of one or more oligomers of the formula (I):
RfQ[OR2O]o[C(O)R1C(O)OR2O]n[C(O)R1C(O)]mT  (I)wherein:
o is a number from 0 to 1 inclusive;n is a number from 1 to 10 inclusive;m is number from 0 to 1 inclusive;Rf is a perfluoroalkyl group having 1 to 6 carbon atoms;Q is selected from the following structures, wherein each k is independently an integer from 0 to 20, R1′ is hydrogen, phenyl, or alkyl of 1 to 4 carbon atoms, R2′ is alkyl of 1 to 20 carbon atoms, and R″ is a monovalent alkyl, cycloalkyl, or aryl radical having from 1 to about 12 carbon atoms:—SO2NR1′(CH2)kO(O)C——CONR1′(CH2)kO(O)C——(CH2)kO(O)C——CH2CH(OR2′)CH2O(O)C——(CH2)kC(O)O——(CH2)kSC(O)——(CH2)kO(CH2)kO(O)C——(CH2)kS(CH2)kO(O)C——(CH2)kSO2(CH2)kO(O)C——(CH2)kS(CH2)kOC(O)——(CH2)kSO2NR1′(CH2)kO(O)C——(CH2)kSO2——SO2NR1′(CH2)kO——SO2NR1′(CH2)k——(CH2)kO(CH2)kC(O)O——(CH2)kSO2NR1′(CH2)kC(O)O——(CH2)kSO2(CH2)kC(O)O——CONR1′(CH2)kC(O)O——(CH2)kS(CH2)kC(O)O——CH2CH(OR2′)CH2C(O)O——SO2NR1′(CH2)kC(O)O——(CH2)kO——CkH2k—OC(O)NH——CkH2k—NR1′C(O)NH—,—OC(O)NR′(CH2)k——(CH2)kNR1′— and—(CH2)kNR1′C(O)O— R1 is the same or different polyvalent organic group that is a residue of a polyacyl compound, that is a straight chain alkylene group of 14 to 18 carbon atoms;R2 is the same or different divalent organic group that is a residue of a fluorinated polyol, at least a portion of which are substituted with or contain one or more perfluoroalkyl groups, perfluoroheteroalkyl groups, or mixtures thereof; andT is RfQ or a non-fluorine containing monofunctional group capable of reacting with a polyacyl compound or a polyol; and (B) 10-50 wt-% of one or more polycarbodiimides selected from the group of:
PCD-1: 8 MDI/2 isostearylalcohol/(8ODA/HDA-HSCH2CHOHCH2OH);PCD-2: 4 MDI/isostearylalcohol/(8iBMA-HSCH2CH2OH);PCD-3: 4 MDI/0.5 isostearyl alcohol/0.5 stearylalcohol/(8 iBMA-HSCH2CH2OH);PCD-4: 4 MDI/0.5 isostearyl alcohol/0.5 behenyl alcohol/(8 iBMA-HSCH2CH2OH);PCD-5: 4 MDI/isostearyl alcohol/(4 ODA-HSCH2CH2OH);PCD-6: 5 MDI/glycerol monostearate/2 (4 MMA-HSCH2CH2OH);PCD-7: 12 MDI/(4 ODA/HDA-HSCH2CH2OH)/2 GMS;PCD-8: 12 MDI/(4 ODA/HDA-MeFBSEA-HSCH2CH2OH)/2 GMS;PCD-9: 12 MDI/(2 ODA/HDA-(2 ODI-HEMA)-HSCH2CH2OH)/2 GMS;PCD-10: 12 MDI/((4 ODI-HEMA)-HSCH2CH2OH)/2 GMS;PCD-11: 12 MDI/isostearylalcohol/(8 ODA/HDA-HSCH2CH2OH)/2 GMS; andPCD-12: 12 MDI/isostearylalcohol/(8 ODA/HDA-HSCH2CH2OH)/4 GMS.