Preparation of a compound containing cyclic and linear carbonate groups

1. Process for the preparation of a compound comprising at least one acrylate or methacrylate group, at least one linear carbonate group and at least one 5-membered cyclic carbonate group characterized in that it comprises:

(A) a ring-opening step in which a compound of general formula (I):

 wherein:

R2 represents a bivalent alkylene radical: —(CR3 R4) p — with p≧3,

R3 and R4 being independently chosen from: hydrogen, cycloaliphatic radical, aromatic radical, alkyl, alkylene or alkenylene C1–C10 chain which chain is linear or branched, contains from 0 to 8 ether bridges, and R3 and/or

R4 may be substituted by alkyl or alkenyl group,

provided that R3 and R4 are free of reacting hydroxyl group,

is reacted with a 5-membered cyclic carbonate group compound of general formula (II):

 wherein:

R5 represents a bivalent alkylene radical: —(CR6R7—CR8R9)—,

R6, R7, R8 and R9 being independently chosen from: hydrogen, cycloaliphatic radical, aromatic radical, alkyl, alkylene or alkenylene C1–C10 chain which chain is linear or branched, contains from 0 to 8 ether bridges,

and R6 and/or R7 and/or R8 and/or R9 may be substituted by an alkyl, alkenyl, hydroxyl group(s), or other 5-membered cyclic carbonate group of formula (II),

provided that at least one of R6, R7, R8, R9 is substituted by an hydroxyl group

and (B) an acrylation step in which the compound obtained in the ring-opening step (A) is reacted with acrylic acid, methacrylic acid, acrylate ester, methacrylate ester, or oligomer(s) thereof to form a compound of general formula (III):

 wherein:

R10 represents a bivalent alkylene radical: —(CR11R12—CR13R14)—, with:

R11, R12, R13 and R14 being, respectively, identical to R6, R7, R8 and R9 if the latter were not substituted with hydroxyl group an at least a part of the hydroxyl-substituent of R6, R7, R8 or R9 is replaced by the moiety

 wherein:

R1=hydrogen or methyl, and 1≦m≦10.

2. Process according to claim 1 , wherein step (A) is made in presence of a catalyst.

3. Process according to claim 2 , wherein the catalyst is a sulfonic acid, preferably para-toluenesulfonic acid.

4. Process according to claim 2 , wherein the catalyst is a metal carboxylate, preferably butyltintrisocoate.

5. Process according to claim 2 , wherein the catalyst concentration is comprised between 0.05 and 5% by weight of the reacting mixture.

6. Process according to claim 1 wherein the reaction temperature during step (A) is comprised between 20 and 150° C.

7. Process according to claim 6 wherein the reaction temperature during step (A) is comprised between 40 and 100° C.

8. Process according to claim 1 wherein R3 and/or R4 is chosen among hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, 2-butenyl, 3-butenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, phenyl or benzyl.

9. Process according to claim 1 wherein the hydroxyl group in compound (II) is a methylol group.

10. Process according to claim 1 wherein p=3.

11. Process according to claim 1 wherein compound (I) is:

12. Process according to claim 1 wherein compound (II) is:

13. Process according to claim 1 wherein compound (II) is:

14. Process according to claim 1 wherein compound (II) is:

15. An ink jet composition containing a compound obtained by the process according to claim 1 .