Hydrocarbon polymers comprising two exo-vinylene cyclic carbonate terminal groups

1. A hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups, said hydrocarbon-based polymer being of formula (1) below:

wherein:

each bond noted is a carbon-carbon single bond geometrically oriented on one side or the other relative to the double bond to which it is bonded;

the groups R1, R2, R3, R4, R5, R6, R7 and R8, which may be identical or different, are selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, a heteroalkyl group, an alkoxycarbonyl group and a heteroalkoxycarbonyl group;

at least one of the groups R1 to R8 optionally forms part of the same saturated or unsaturated hydrocarbon-based ring or heterocycle, with at least one other of the groups R1 to R8;

at least one of the pairs (R1,R2), (R3,R4), (R5,R6) and (R7,R8) optionally is an oxo group;

x and y, which may be identical or different, are integers within a range from 0 to 5;

the groups R13, R14, R15 and R16, which may be identical or different, are selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, a heteroalkyl group, an alkoxycarbonyl group and a heteroalkoxycarbonyl group;

at least one of the groups R13 to R16 optionally forms part of the same saturated or unsaturated hydrocarbon-based ring or heterocycle, with at least one other of the groups R13 to R16;

the group R17 comprises CH 2 , O, S, C(═O) or NR 0 , R 0 being an alkyl group comprising from 1 to 22 carbon atoms; and

n comprises an integer greater than or equal to 2 and m comprises an integer greater than or equal to 0, wherein the mole ratio m/n is within a range from 0/100 to 90/10; n and m are also such that the number-average molar mass Mn of the hydrocarbon-based polymer of formula (1) is within a range from 400 to 50 000 g/mol;

F1 is represented by the following formula:

and F2 is represented by the following formula:

wherein:

p1 and p2, which may be identical or different, each represent an integer equal to 0, 1, 2 or 3;

X is an oxygen atom or a nitrogenous group NR12 in which R12 is a C1-C6 alkyl group;

A is a C1-C6 alkylene group;

R9 comprises a hydrogen atom, a C1-C6 alkyl group, a C1-C6 alkyl group oxyalkylenated with one or more C1-C6 oxyalkylene groups, a C5-C6 cycloalkyl group, a phenyl group or an alkylphenyl group with a C1-C4 alkyl chain; and

R10 and R11, which may be identical or different, each comprise a hydrogen atom, a C1-C6 alkyl group, a C1-C6 alkyl group oxyalkylenated with one or more C1-C6 oxyalkylene groups, a C5-C6 cycloalkyl group, a phenyl group or an alkylphenyl group with a C1-C4 alkyl chain.

2. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein m is equal to 0, the polymer being of formula (2) below:

wherein: x, y, n, F1, F2, R1, R2, R3, R4, R5, R6, R7 and R8 are as defined in claim 1 .

3. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein X is an oxygen atom.

4. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein X is a group NR12 wherein R12 is as defined in claim 1 .

5. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein R12 is a methyl group.

6. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein R9 is a hydrogen atom, R10 and R11 are methyl groups, and p1=0 or p2=0.

7. The hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , wherein p1=p2=0.

8. A process for preparing at least one hydrocarbon-based polymer comprising two exo-vinylene cyclocarbonate end groups as claimed in claim 1 , said process comprising at least one step of ring-opening metathesis polymerization, in the presence of:

at least one metathesis catalyst,

at least one mono- or di-exo-vinylene cyclocarbonate chain-transfer agent of formula (C1) or (C2), respectively, below:

wherein:

F1 and F2 are as defined in claim 1 , and

the bond is a carbon-carbon single bond geometrically oriented on one side or the other relative to the double bond in formula (C2);

at least one compound of formula (A) below:

wherein the groups R1, R2, R3, R4, R5, R6, R7 and R8, and x and y are as defined in claim 1 ; and

optionally, at least one compound of formula (B):

wherein the groups R13, R14, R15 and R16 are as defined in claim 1 ;

for a reaction time ranging from 2 to 24 hours and at a temperature within a range from 20 to 60° C.

9. The preparation process as claimed in claim 8 , said process being such that the mole ratio of the CTA of formula (C1) to the compound of formula (A), or to the sum of the compounds of formulae (A) and (B), if the compound of formula (B) is present, is within a range from 1×10 −3 to 1.0 or the mole ratio of the CTA of formula (2) to the compound of formula (A), or to the sum of the compounds of formulae (A) and (B), if the compound of formula (B) is present, is within a range from 0.5×10 −3 to 0.5.

10. A process for preparing polyurethane, comprising the reaction of at least one hydrocarbon-based polymer of formula (1) as claimed in claim 1 with at least one compound comprising at least one amine group.