Thermally stable surfactants and compositions and methods of use thereof
View Patent ↗There are provided novel thermally stable surfactants for use with fillers in the preparation of polymer composites and nanocomposites. Typically, surfactants of the invention are urethanes, ureas or esters of thiocarbamic acid having a hydrocarbyl group of from 10 to 50 carbons and optionally including an ionizable or charged group (e.g., carboxyl group or quaternary amine). Thus, there are provided surfactants having Formula I: wherein the variables are as defined herein. Further provided are methods of making thermally stable surfactants and compositions, including composites and nanocomposites, using fillers coated with the surfactants.
1. A compound having Formula I:
wherein
W 1 and W 2 are independently O, S, or NH;
V 1 and V 2 are independently O or NH;
L and X are independently a C 2-20 alkylene, cycloalkylene, or arylene group, optionally substituted with one or more F, Cl, Br, or CF 3 ;
Y is —COOR 2 , —N(R 3 ) 3 + Z, —OSO 3 R 4 2 , —SO 3 R 4 , —OPO 3 R 4 2 , —PO 3 R 4 , or —PO 2 R 4 ; or X and Y together form R 1 ;
Z is a negatively charged counter ion;
R 1 at each occurrence is independently a C 10-100 alkyl or alkenyl, group, each optionally substituted with one or more F, Cl, or Br;
R 2 is H, a positively charged counter ion, or an alkyl, alkenyl, aryl, aralkyl, heterocyclyl, or heterocyclalkyl group;
R 3 at each occurrence is independently C 1-4 alkyl;
R 4 at each occurrence is independently H or a positively charged counter ion; and
n is 0, 1, 2, or 3.
2. The compound of claim 1 wherein W 1 and W 2 are both O or both NH.
3. The compound of claim 1 wherein one of W 1 and V 1 is O and one is NH, and one of W 2 and V 2 is O and one is NH.
4. The compound of claim 1 wherein L and X are each a C 2-20 alkylene optionally substituted with one or more F, Cl, or Br.
5. The compound of claim 1 wherein L and X are independently ethylene, propylene, butylene, hexylene, octylene, decylene, dodecylene, phenylene or tolylene.
6. The compound of claim 1 wherein Y is —COOH or —N(CH 3 ) 3 + Z.
7. The compound of claim 1 wherein Z is F − , Cl − , Br − , I − , SO 4 2− , HSO 4 − , or CH 3 OSO 3 − .
8. The compound of claim 1 wherein R 2 is H, Li + , Na + , K + , methyl, ethyl, or benzyl.
9. The compound of claim 1 wherein R 1 is a C 20-60 polyethylene group, optionally substituted with one or more F, Cl, or Br.
10. The compound of claim 1 having the Formula IA:
11. The compound of claim 1 having the Formula IB:
12. A method of making a compound of claim 1 , the method comprising
reacting an isocyanate having the structure R 1 -L-NCO with H—W 2 —X—Y to provide a compound of Formula IA1, or reacting an isocyanate having the structure OCN—W 2 —X—Y with R 1 -L-V 2 —H to provide a compound of Formula IA2
wherein
W 2 is O, S, or NH;
V 2 is O or NH;
X is a C 2-20 alkylene, cycloalkylene, or arylene group, optionally substituted with one or more F, Cl, Br, or CF 3 ,;
Y is —COOR 2 , —N(R 3 ) 3 + Z, —OSO 3 R 4 2 , —SO 3 R 4 , —OPO 3 R 4 2 , —PO 3 R 4 , or —PO 2 R 4 ; or X and Y together form R 1 ;
Z is a negatively charged counter ion;
R 1 at each occurrence is independently a C 10-100 alkyl or alkenyl, group, each optionally substituted with one or more F, Cl, or Br;
R 2 is H, a positively charged counter ion, or an alkyl, alkenyl, aryl, aralkyl, heterocyclyl, or heterocyclalkyl group;
R 3 at each occurrence is independently C 1-4 alkyl; and
R 4 at each occurrence is independently H or a positively charged counter ion.
13. A method of making a compound of claim 1 , the method comprising
reacting a diisocyanate having the structure OCN-L-NCO sequentially or simultaneously with compounds having the structure H—W 2 —R 1 and H—W 2 —X—Y
to provide a compound of Formula IB
wherein
W 1 and W 2 are independently O, S, or NH;
L and X are independently a C 2-20 alkylene, cycloalkylene, or arylene group, optionally substituted with one or more F, Cl, Br, or CF 3 ;
Y is —COOR 2 , —N(R 3 ) 3 + Z, —OSO 3 R 4 2 , —SO 3 R 4 , —OPO 3 R 4 2 , —PO 3 R 4 , or —PO 2 R 4 ; or X and Y together form R 1 ;
Z is a negatively charged counter ion;
R 1 at each occurrence is independently a C 10-100 alkyl or alkenyl, group, each optionally substituted with one or more F, Cl, or Br;
R 2 is H, a positively charged counter ion, or an alkyl, alkenyl, aryl, aralkyl, heterocyclyl, or heterocyclalkyl group;
R 3 at each occurrence is independently C 1-4 alkyl; and
R 4 at each occurrence is independently H or a positively charged counter ion.
14. The method of claim 13 wherein Y is —N(R 3 ) 3 + Z and H—W 2 —X—Y is an ionic liquid.
15. The method of making a compound of claim 1 comprising reacting a compound having the structure H—V 1 -L-V 2 —H sequentially or simultaneously with compounds having the structure OCN—W 2 —R 1 and OCN—W 2 —X—Y to provide a compound of Formula IB2:
wherein
V 1 and V 2 are independently O or NH;
L and X are independently a C 2-20 alkylene, cycloalkylene, or arylene group, optionally substituted with one or more F, Cl, Br, or CF 3 .
Y is —COOR 2 , —N(R 3 ) 3 + Z, —OSO 3 R 4 2 , —SO 3 R 4 , —OPO 3 R 4 2 , —PO 3 R 4 , or —PO 2 R 4 ; or X and Y together form R 1 ;
Z is a negatively charged counter ion;
R 1 at each occurrence is independently a C 10-100 alkyl or alkenyl, group, each optionally substituted with one or more F, Cl, or Br;
R 2 is H, a positively charged counter ion, or an alkyl, alkenyl, aryl, aralkyl, heterocyclyl, or heterocyclalkyl group;
R 3 at each occurrence is independently C 1-4 alkyl; and
R 4 at each occurrence is independently H or a positively charged counter ion.