Polyarylether ketone compositions and method of coating a metal surface

1. A method of coating a metal surface, said method comprising applying to a metal surface a polymer composition comprising a polymer blend [blend (B)] consisting of:

a first polyaryl ether ketone (PAEK-1) and

a second polyaryl ether ketone (PAEK-2),

wherein the (PAEK-1) is crystalline and exhibits a melting temperature Tm of 330° C. or higher and the (PAEK-2) is either amorphous or crystalline and exhibits a melting temperature T m of 315° C. or lower and wherein the (PAEK-1) constitutes more than 50% wt of blend (B)

and wherein the polymer composition is heated to a temperature higher than the melting temperature of (PAEK-1) before being applied to the metal surface,

wherein the polymer blend (B) is a blend (B-1) comprising:

a (PAEK-1) which is a polyether ether ketone comprising at least 98% moles of recurring units of formula (J′-A):

and

a (PAEK-2) wherein at least 50% moles of the recurring units are a combination of units of formula (J′-A) and (J′-D), units of formula (J′″-A), units of formula (J′-P), or a combination of units of formulas (J′-A) and (J″-A), said units complying with the formulas:

2. The method according to claim 1 , wherein the blend (B-1) is selected from the group consisting of:

2) a blend (B-1), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) wherein all recurring units are a combination of units (J′-A) and (J′-D);

3) a blend (B-1c), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) wherein all the recurring units are recurring units of formula (J′-P);

4) a blend (B-1d), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) in which at least 50% moles of the recurring units are recurring units (P- A);

and

5) a blend (B-1e), comprising:

a (PAEK-1) which is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) which is a PAEK in which at least 95% moles of the recurring units are recurring units (J′-A) and (J″-A).

3. A polymer composition comprising a polymer blend [blend (B-1)] selected from the group consisting of the blend (B-1c), the blend (B-1d) and the blend (B-1e) according to claim 2 .

4. The method according to claim 1 , wherein the polymer composition comprises a reinforcing filler.

5. A method of coating a metal surface, said method comprising applying to a metal surface a polymer composition comprising a polymer blend [blend (B)] consisting of:

a first polyaryl ether ketone (PAEK-1) and

a second polyaryl ether ketone (PAEK-2),

wherein the (PAEK-1) is crystalline and exhibits a melting temperature T m of 330° C. or higher and the (PAEK-2) is either amorphous or crystalline and exhibits a melting temperature T m of 315° C. or lower and wherein the (PAEK-1) constitutes more than 50% wt. of blend (B),

and wherein the polymer composition is heated to a temperature higher than the melting temperature of (PAEK-1) before being applied to the metal surface,

wherein the blend (B) is a blend (B-2) comprising a (PAEK-2) which is a PAEK wherein at least 50% moles of recurring units comply with formula (J″-A) or (J″-Q):

6. The method according to claim 5 , wherein the blend (B-2) comprises a (PAEK-1) in which at least 50% moles of the recurring units comply with formula (J′-A), with a combination of formulas (J′-B) and (J″-B) or with formula (J′-C):

7. The method according to claim 6 , wherein the blend (B-2) is selected from the group consisting of:

1) a blend (B-2a), comprising:

a (PAEK-1) that is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) that is a PAEK wherein at least 95% moles of the recurring units are recurring units (J″-A);

and

2) a blend (B-2b), comprising:

a (PAEK-1) that is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) that is a PAEK wherein at least 95% moles of the recurring units are recurring units (J″-Q).

8. A polymer composition comprising the polymer blend (B-2a) and (B-2b) according to claim 7 .

9. A polymer composition comprising the polymer blend (B-2) according to claim 5 .

10. The method according to claim 5 , wherein the polymer composition comprises a reinforcing filler.

11. A metal surface coated with a polymer composition comprising a polymer blend [blend (B)] consisting of:

a first polyaryl ether ketone (PAEK-1) and

a second polyaryl ether ketone (PAEK-2),

wherein the (PAEK-1) is crystalline and exhibits a melting temperature T m of 330° C. or higher and the (PAEK-2) is either amorphous or crystalline and exhibits a melting temperature T m of 315° C. or lower and wherein the (PAEK-1) constitutes more than 50% wt. of blend (B),

wherein the blend (B) is a blend (B-1) comprising:

a (PAEK-1) which is a polyether ether ketone comprising at least 98% moles of recurring units of formula (J′-A):

and

a (PAEK-2) wherein at least 50% moles of the recurring units are a combination of units of formula (J′-A) and (J′-D), units of formula (J′″-A), units of formula (J′-P), or a combination of units of formulas (J′-A) and (J″-A), said units complying with the formulas:

or

wherein the blend (B) is a blend (B-2) comprising a (PAEK-2) which is a PAEK wherein at least 50% moles of recurring units comply with formula (J″-A) or (J″-Q):

12. The metal surface of claim 11 , wherein the surface is of a wire, or the surface is of a structural part of an electronic device.

13. A wire or an electronic device or a part thereof comprising at least one metal surface coated with the polymer composition according to claim 11 .

14. The metal surface of claim 11 , wherein the blend (B) is the blend (B-2) comprising a (PAEK-1) in which at least 50% moles of the recurring units comply with formula (J′-A), with a combination of formulas (J′-B) and (J″-B) or with formula (J′-C):

15. The metal surface of claim 14 , wherein the blend (B-2) is selected from:

1) a blend (B-2a), comprising:

a (PAEK-1) that is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) that is a PAEK wherein at least 95% moles of the recurring units are recurring units (J″-A); and

2) a blend (B-2b), comprising:

a (PAEK-1) that is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) that is a PAEK wherein at least 95% moles of the recurring units are recurring units (J″-Q).

16. The metal surface of claim 11 , wherein the blend is blend (B-1) selected from the group consisting of:

2) a blend (B-1b), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) wherein all recurring units are a combination of units (J′-A) and (J′-D);

3) a blend (B-1c), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) wherein all the recurring units are recurring units of formula (J′-P);

4) a blend (B-1d), comprising:

a (PAEK-1) wherein all recurring units are units of formula (J′-A) and

a (PAEK-2) in which at least 50% moles of the recurring units are recurring units (J′″-A);

and

5) a blend (B-1e), comprising:

a (PAEK-1) which is a PEEK wherein at least 98% moles of the recurring units are units of formula (J′-A) and

a (PAEK-2) which is a PAEK in which at least 95% moles of the recurring units are recurring units (J′-A) and (J″-A).