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Full text of "USPTO Patents Application 10687092"

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This following Listing of Claims replaces all prior versions, and listings, of claims in 
the present application. 



Listing of Claims 

Claims 1-11: (canceled) 

12. (currently amended) A polymer-grafted natural fiber wherei n the natural fiber is a 
natural cellulose fiber and the polymer is a polyether having the general formula (I) : 

where: 

m is between 1 and 200; 

R is an aliphatic or aliphatic/aromatic group: and 



X = 



R 2 



n 



where: 

n is between 1 and 20; and 

R] is the same as or different from R? and is either hydrogen or a linear or branched aliphatic 



grou p, 

or 



X = one of the following: 




a b 




d c 



c b 



c d 



wherein at least one of positions "a", "b", "c" and "d" has attached thereto a substituting 
group which may be the same as or different from other substituting groups that can be 
attached at other of the positions "a", "b", "c" and "d", said substituting group or groups being 
selected from the group consisting of halogens, linear C i- Q alkvl groups and branched C±-C* 
alkvl groups . 



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13. (canceled) 



14. (currently amended) A polymer-grafted natural fiber wherein the natural fiber is a 
natural cellulose fiber and the polymer is a polvether having the general formula (T) : 



Rf-o-x-l 



m_ 



_0) 



where: 

m is between 1 and 200; 

R is an aliphatic or aliphatic/aromatic group; and 

f' 

X= — c— | 
I 

R 2 

^ J n 



where: 

n is between 1 and 20; and 

R]_ is the same as or different from R? and is either hydrogen or a linear or branched aliphatic 
group, 
or 

X = one of the following: 




d c 



c b 



c d 



wherein at least one of positions "a", "b", "c" and "d" has attached thereto a 
substituting group which may be the same as or different from other substituting groups that 
can be attached at other of the positions "a", "b", "c" and "d", said substituting group or 
groups being selected from the group consisting of halogens, linear C ^-CU alkyl groups and 
branched C4-C4 alkyl groups, 

said polymer-grafted natural fiber being obtained using a process comprising the 
following steps: 

converting [[the]] hydroxyl groups on the natural fiber into the corresponding salified 
alcoholate groups; 

grafting on the salified alcoholate groups a functionaliz e d poly e th e r containing said 
polyether that has been functionalized with a leaving group that favors nucleophilic 
substitution. 



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15. (currently amended) A composite material comprising polymer-grafted natural 
fibers, wherein the natural fibers are natural cellulose fibers and the polymer is a polyether 
having the general formula (D : 

Rr-O-X-L. 0) 

where: 

m is between 1 and 200; 

R is an aliphatic or aliphatic/aromatic group: and 



x = 



— cH 
I 

R 2 



n 



where: 

n is between 1 and 20: and 

R]_ is the same as or different from R? and is either hydrogen or a linear or branched aliphatic 



group, 
or 



X = one of the following: 




d c 



c b 



c d 



wherein at least one of positions "a", "b". "c" and "d" has attached thereto a 
substituting group which may be the same as or different from other substituting groups that 
can be attached at other of the positions "a", "b". "c" and "d". said substituting group or 
groups being selected from the group consisting of halogens, linear Cj-Q alkyl groups and 
branched C i- Q alkyl groups . 



16. (canceled) 



17. (currently amended) A composite material using polymer-grafted natural fibers, 
wherein the natural fibers are natural cellulose fibers and the polymer is a polyether having 
the general formula (I) : 

Rf-o-x-1 . Q) 



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where: 

m is between 1 and 200: 

R is an aliphatic or aliphatic/aromatic group; and 



X = 



— cH 
I 

R 2 



where: 

n is between 1 and 20; and 

Rj is the same as or different from R? and is either hydrogen or a linear or branched aliphatic 
group, 
or 

X = one of the following: 




d c 



c b 



c d 



wherein at least one of positions "a", "b", "c" and "d" has attached thereto a 
substituting group which may be the same as or different from other substituting groups that 
can be attached at other of the positions "a", "b", "c" and "d", said substituting group or 
groups being selected from the group consisting of halogens, linear C^-CU alkvl groups and 
branched C4-C4 alkvl groups, 

wherein the natural fibers are grafted with polym e rs the polymer using a process 
comprising the following steps: 

converting [[the]] hydroxyl groups on the natural fiber into the corresponding salified 
alcoholate groups; 

grafting on the salified alcoholate groups a functionaliz e d poly e th e r containing said 
polyether that has been functionalized with a leaving group that favors nucleophilic 
substitution. 



18. (canceled) 

19. (canceled) 



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20. (new) A polymer-grafted natural fiber according to claim 12, wherein polyether 
chains that are grafted onto said natural fiber are ready-made chains of predetermined 
molecular weight. 

21. (new) A polymer-grafted natural fiber according to claim 20, wherein the 
polyether chains grafted onto said natural fiber are of substantially uniform chain length. 

22. (new) A polymer-grafted natural fiber according to claim 12, wherein the natural 
fiber retains its native crystal structure. 

23. (new) A polymer-grafted natural fiber according to claim 12, said polyether being 
a polyoxyalkylene. 

24. (new) A composite material according to claim 15, wherein polyether chains that 
are grafted onto said natural fibers are ready-made chains of predetermined molecular weight. 

25. (new) A composite material according to claim 24, wherein the polyether chains 
grafted onto said natural fibers are of substantially uniform chain length. 

26. (new) A composite material according to claim 15, wherein the natural fibers 
retain their native crystal structure. 

27. (new) A composite material according to claim 15, said polyether being a 
polyoxyalkylene. 

28. (new) A polymer-grafted natural fiber according to claim 14, said fimctionalized 
polyether being a ready made polyether chain of predetermined molecular weight. 

29. (new) A polymer-grafted natural fiber according to claim 14, said fimctionalized 
polyether being a polyoxyalkylene having said leaving group attached. 

30. (new) A composite material according to claim 17, said fimctionalized polyether 
being a ready made polyether chain of predetermined molecular weight. 

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31. (new) A composite material according to claim 17, said functionalized polyether 
being a polyoxyalkylene having said leaving group attached. 



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