Polymer composition

1. A polymer composition comprising

1) a polymer (P1) comprising at least 50% by weight of monomeric units derived from an ethylenically unsaturated monomer (M1), and

2) at least one co-oligomer (O1) comprising at least:

a) a component (A) comprising at least one monomeric unit identical to that derived from the monomer (M1) on which the polymer (P1) is based, and

b) a component (B) comprising at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one phosphonate group —PO(OH)(OR 1 ) with R 1 being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms,

wherein the number-average molar mass of polymer (P1) is greater than 30,000 and the number-average molar mass of co-oligomer (O1) is less than or equal to 30,000.

2. The composition according to claim 1 , wherein the polymer (P1) is a chlorinated polymer.

3. The composition according to claim 1 , wherein in the polymer (P1) ethylenically unsaturated monomer (M1) is vinylidene chloride, which is present in an amount of 70 to 95% by weight.

4. A process for preparing a composition according to claim 1 , comprising the mixing of the polymer (P1) and of the co-oligomer(s) (O1) in at least one solvent, the dispersion of the co-oligomer(s) (O1) in an aqueous dispersion of the polymer (P1), or the mixing of the polymer (P1) and of the co-oligomer(s) (O1) by premixing.

5. A process for coating metal, polymer, paper or cellophane surfaces with the polymer composition according to claim 1 , according to which the polymer composition is coated onto said surface, colaminated with said surface or coextruded with the material forming said surface.

6. An article or part of an article comprising the polymer composition according to claim 1 .

7. A method for producing a single-layer or multi-layer film comprising forming the film with the composition according to claim 1 .

8. The composition according to claim 1 , wherein the number-average molar mass of polymer (P1) is less than or equal to 2,000,000 and the number-average molar mass of co-oligomer (O1) is less than or equal to 25,000.

9. The composition according to claim 1 , wherein the at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one phosphonate group —PO(OH)(OR 1 ) with R 1 being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms is selected from the group consisting of:

CH 2 ═CR 9 —CO—O—(CH 2 ) i —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and i being between 1 and 20,

CH 2 ═CR 9 —CO—O—CR 10 R 11 —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and R 10 and R 11 , which are the same or different, being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms,

CH 2 ═CR 9 —CO—O—CH 2 —CH(OH)—CH 2 —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical,

CH 2 ═CR 9 —CO—O—CH 2 —CH(OH)—CH 2 —CO—O—(CH 2 ) 2 —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical,

CH 2 ═CR 9 —CO—O—CH 2 —CH 2 —NH—CO—O—(CH 2 ) i —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and i being between 1 and 20,

CH 2 ═CR 9 —CO—O—CH 2 —CH 2 —NH—CO—O−CR 10 R 11 —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and R 10 and R 11 , which are the same or different, being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms,

CH 2 ═C(CH 3 )—C 6 H 4 —C(CH 3 ) 2 —NH—CO—O—(CH 2 ) i —PO(OH)(OR 1 ) with i between 1 and 20,

CH 2 ═C(CH 3 )—C 6 H 4 —C(CH 3 ) 2 —NH—CO—O—CR 10 R 11 —PO(OH)(OR 1 ) with R 10 and R 11 , which are the same or different, being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms and the substitution of the aromatic ring being in the meta-position,

CH 2 ═CH—C 6 H 4 —CH 2 —PO(OH)(OR 1 ) with the substitution of the aromatic ring being a mixture of ortho- and para-substitution,

CH 2 ═CH—PO(OH)(OR 1 ), and

the corresponding monomers carrying at least one group —PO(OR 1′ )(OR 2′ ) with R 1′ and R 2′ , which are the same or different, representing an alkyl radical containing from 1 to 11 carbon atoms which, after total cleavage or partial cleavage, results in the phosphonate group —PO(OH)(OR 1 ),

and mixtures thereof.

10. The composition according to claim 1 , wherein the at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one phosphonate group —PO(OH)(OR 1 ) with R 1 being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms is selected from the group consisting of:

CH 2 ═CR 9 —CO—O—(CH 2 ) i —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and i being between 1 and 20,

CH 2 ═CR 9 —CO—O—CH 2 —CH 2 —NH—CO—O—(CH 2 ) i —PO(OH)(OR 1 ) with R 9 being a hydrogen atom or a methyl radical and i being between 1 and 20,

CH 2 ═CH—PO(OH)(OR 1 ), and

the corresponding monomers carrying at least one group —PO(OR 1′ )(OR 2′ ) with R 1′ and R 2′ , which are the same or different, representing an alkyl radical containing from 1 to 11 carbon atoms which, after total cleavage or partial cleavage, results in the phosphonate group —PO(OH)(OR 1 ), and

mixtures thereof.

11. A polymer composition comprising

1) a polymer (P1) comprising at least 50% by weight of monomeric units derived from an ethylenically unsaturated monomer (M1), and

2) at least one co-oligomer (O1) comprising at least:

a) a component (A) comprising at least one monomeric unit identical to that derived from the monomer (M1) on which the polymer (P1) is based, and

b) a component (B) comprising at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one —(CH 2 ) b —C c F 2c+1 group with b between 1 and 11 and c greater than or equal to 5,

wherein

the number-average molar mass of polymer (P1) is greater than 30,000 and the number-average molar mass of co-oligomer (O1) is less than or equal to 30,000, and

wherein the at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one —(CH 2 ) b —C c F 2c+1 group with b between 1 and 11 and c greater than or equal to 5 is selected from the group consisting of:

CH 2 ═CH—CO—O—(CH 2 ) b —C c F 2c+1 ,

CH 2 ═C(CH 3 )—CO—O—(CH 2 ) b —C c F 2c+1 ,

CH 2 ═CH—CO—O—(CH 2 ) f —NR 8 —SO 2 —(CH 2 ) b —C c F 2c+1 , with R 8 being a hydrogen atom or a radical —CH 3 and f being between 1 and 15,

CH 2 ═CH—C 6 H 4 —CH 2 —O—(CH 2 ) b —C c F 2c+1 ,

CH 2 ═CH—O—CO—(CH 2 ) b —C c F 2c+1 , and

mixtures thereof.

12. The composition according to claim 11 , wherein the polymer (P1) is a chlorinated polymer.

13. The composition according to claim 11 , wherein in the polymer (P1) ethylenically unsaturated monomer (M1) is vinylidene chloride, which is present in an amount of 70 to 95% by weight.

14. A process for preparing a composition according to claim 11 , comprising the mixing of the polymer (P1) and of the co-oligomer(s) (O1) in at least one solvent, the dispersion of the co-oligomer(s) (O1) in an aqueous dispersion of the polymer (P1), or the mixing of the polymer (P1) and of the co-oligomer(s) (O1) by premixing.

15. A process for coating metal, polymer, paper or cellophane surfaces with the polymer composition according to claim 11 , according to which the polymer composition is coated onto said surfaces, colaminated with said surface or coextruded with the material forming said surface.

16. An article or part of an article comprising the polyer composition according to claim 11 .

17. A method for producing a single-layer or multi-layer film comprising forming the film with the composition according to claim 11 .

18. The composition according to claim 11 , wherein the number-average molar mass of polymer (P1) is less than or equal to 2,000,000 and the number-average molar mass of co-oligomer (O1) is less than or equal to 25,000.

19. The composition according to claim 11 , wherein the at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one —(CH 2 ) b —C c F 2c+1 group with b between 1 and 11 and c greater than or equal to 5 is selected from the group consisting of:

CH 2 ═CH—CO—O—(CH 2 ) b —C c F 2c+1 , and

CH 2 ═C(CH 3 )—CO—O—(CH 2 ) b —C c F 2c+1 , and

mixtures thereof.