Multilayer element comprising an interlayer comprising a copolymer of ethylene with a comonomer containing silane group(s)

1. A multilayer element (LE) comprising a first layer element, an interlayer element and a second layer element, wherein

the first layer element comprises a glass layer or a polymeric layer;

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units,

wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the second layer element comprises a glass layer element or a polymeric layer element;

and wherein the interlayer element is in adhering contact with said first and second layer element, and wherein the interlayer element has a thickness of 0.03 mm to 3.0 mm.

2. The multilayer element (LE) according to claim 1 , wherein the copolymer of ethylene (a) is selected from

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s) and with silane group(s) containing comonomer.

3. The multilayer element (LE) according to claim 1 , wherein the polar comonomer is present in the copolymer of ethylene (a2) in an amount of 0.5 to 30.0 mol %.

4. The multilayer element (LE) according to claim 1 , the silane group(s) containing unit is a hydrolysable unsaturated silane compound represented by the formula (I):

R 1 SiR 2 q Y 3-q   (I)

wherein

R 1 is an ethylenically unsaturated hydrocarbyl, hydrocarbyloxy or (meth)acryloxy hydrocarbyl group,

each R 2 is independently an aliphatic saturated hydrocarbyl group,

Y which is/are the same or different, is a hydrolysable organic group and

q is 0, 1 or 2.

5. The multilayer element (LE) according to claim 1 , wherein the polar comonomer is present in the copolymer of ethylene (a2) in an amount of 2.5 to 18 mol %.

6. The multilayer element (LE) according to claim 1 , wherein the polymer composition of the interlayer element is crosslinked.

7. The multilayer element (LE) according to claim 1 , wherein interlayer element is the sole polymeric layer element between the first and second layer element.

8. The multilayer element (LE) according to claim 1 , wherein the multilayer element is transparent.

9. A laminated glass layer element (GLE) comprising a first glass layer element, an interlayer element and a second glass layer element, in the given order, wherein

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units,

wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the interlayer element is in adhering contact with said first glass layer element and said second glass layer element, and wherein the interlayer element has a thickness of 0.03 mm to 3.0 mm.

10. A process comprising producing an article comprising a multilayer element (LE) or a laminated glass layer element (GLE), for construction applications, elements in bridges, elements in vehicles, elements in production equipments, elements in household devices, projection applications, or elements in furniture,

wherein the multilayer element (LE) comprises a first layer element, an interlayer element and a second layer element, wherein

the first layer element comprises a glass layer or a polymeric layer;

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units, wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the second layer element comprises a glass layer element or a polymeric layer element;

and wherein the interlayer element is in adhering contact with said first and second layer element;

wherein the laminated glass layer element (GLE) comprises a first glass layer element, an interlayer element and a second glass layer element, in the given order, wherein

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units, wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the interlayer element is in adhering contact with said first glass layer element and said second glass layer element,

wherein the interlayer element has a thickness of 0.03 mm to 3.0 mm, wherein producing the article comprises the step of

a) producing a multilayer element (LE) by

assembling the first layer element, interlayer element and the second layer element to a multilayer assembly;

laminating the layers of the multilayer assembly at elevated temperature and optionally at vacuum conditions to obtain a multilayer element (LE); and

recovering the article comprising the obtained multilayer element (LE) or

a-1) producing a laminated glass element (GLE) by

assembling the first glass layer element, interlayer element and the second glass layer element to a multilayer assembly;

laminating the layers of the multilayer assembly at elevated temperature and optionally at vacuum conditions to obtain a laminated glass element (GLE); and

recovering the article comprising the laminated glass element (GLE).

11. A process for producing a multilayer element (LE) or a laminated glass element (GLE),

wherein the multilayer element (LE) comprises a first layer element, an interlayer element and a second layer element, wherein

the first layer element comprises a glass layer or a polymeric layer;

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units,

wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the second layer element comprises a glass layer element or a polymeric layer element;

and wherein the interlayer element is in adhering contact with said first and second layer element;

wherein the laminated glass layer element (GLE) comprises a first glass layer element, an interlayer element and a second glass layer element, in the given order, wherein

the interlayer element comprises a polymer composition comprising a copolymer of ethylene (a) which is selected from the group consisting of

(a2) a copolymer of ethylene with one or more polar comonomer(s) selected from (C1-C6)-alkyl acrylate or (C1-C6)-alkyl (C1-C6)-alkylacrylate comonomer(s), which copolymer (a2) bears silane group(s) containing units,

wherein the copolymer of ethylene (a) has a melt flow rate, MFR 2 , of from 2.0 to 8 g/10 min, determined according to ISO 1133 at 190° C. and a load of 2.16 kg, and a melting temperature of from 70° C. to 110° C., determined according to ASTM D3418; and

the interlayer element is in adhering contact with said first glass layer element and said second glass layer element, and

wherein the process comprises the steps of

assembling the first layer element, interlayer element and the second layer element to a multilayer assembly;

laminating the layers of the multilayer assembly at elevated temperature and optionally at vacuum conditions to obtain multilayer element (LE) or the laminated glass element (GLE); and

recovering the obtained multilayer element (LE) or the laminated glass element (GLE), wherein the interlayer element has a thickness of 0.03 mm to 3.0 mm.

12. The process according to claim 11 further comprising the steps of:

extruding the polymer composition together with a crosslinking agent selected from a peroxide or a silanol condensation catalyst (SCC) at a temperature below the decomposition temperature of said peroxide or below the crosslinking temperature of said silanol condensation catalyst (SCC) to form a crosslinkable interlayer element;

performing the lamination step at a temperature higher than the decomposition temperature of said peroxide or at a temperature at or above the crosslinking temperature of said silanol condensation catalyst (SCC); and

crosslinking the polymer composition of said crosslinkable interlayer element.

13. The process according to claim 10 further comprising the steps of:

extruding the polymer composition together with a crosslinking agent selected from a peroxide or a silanol condensation catalyst (SCC) at a temperature below the decomposition temperature of said peroxide or below the crosslinking temperature of said silanol condensation catalyst (SCC) to form a crosslinkable interlayer element;

performing the lamination step at a temperature higher than the decomposition temperature of said peroxide or at a temperature at or above the crosslinking temperature of said silanol condensation catalyst (SCC); and

crosslinking the polymer composition of said crosslinkable interlayer element.

14. The multilayer element (LE) according to claim 3 , wherein the polar comonomer is selected from (C1-C6)-alkyl acrylate comonomer.

15. The multilayer element (LE) according to claim 4 , wherein the amount of the silane group(s) containing unit is of 0.01 to 2.0 mol %.

16. The multilayer element (LE) according to claim 4 , wherein the copolymer of ethylene (a1) and the copolymer of ethylene (a2) are produced by polymerisation in a high pressure polymerisation process using a radical initiator.