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1. WO2020139993 - CURABLE COMPOSITIONS COMPRISING UNSATURATED POLYOLEFINS

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[ EN ]

What is claimed is:

1. A curable composition for a cable insulation layer, the curable composition comprising (A) a polyolefin component comprising an unsaturated polyolefin of the formula A1L1 and (B) a curing component comprising a cross-linking agent, wherein:

L1 is a polyolefin;

A1 is selected from the group consisting of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylidene group of the formula CH2=C(Y1)-, a mixture of a vinylidene group of the formula CH2=C(Y1)-and a vinylene group of the formula Y1CH=CH-, and a mixture of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, and a vinylene group of the formula Y1CH=CH-; and

Y1 at each occurrence independently is a C1 to C30 hydrocarbyl group.

2. A curable composition for a cable insulation layer, the curable composition comprising (A) a polyolefin component comprising a telechelic polyolefin of the formula A1L1L2A2 and (B) a curing component comprising a cross-linking agent, wherein:

L1 is a polyolefin;

A1 is selected from the group consisting of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylidene group of the formula CH2=C(Y1)-, a mixture of a vinylidene group of the formula CH2=C(Y1)-and a vinylene group of the formula Y1CH=CH-, and a mixture of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, and a vinylene group of the formula Y1CH=CH-;

Y1 at each occurrence independently is a C1 to C30 hydrocarbyl group;

L2 is a C1 to C32 hydrocarbylene group; and

A2 is a hydrocarbyl group comprising a hindered double bond.

3. A curable composition for a cable insulation layer, the curable composition comprising (A) a polyolefin component comprising an unsaturated polyolefin of the formula A1L1 and a telechelic polyolefin of the formula A1L1L2A2 and (B) a curing component comprising a cross-linking agent, wherein:

L1 at each occurrence independently is a polyolefin;

A1 at each occurrence independently is selected from the group consisting of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylene group of the formula Y1CH=CH-, a mixture of a vinyl group and a vinylidene group of the formula CH2=C(Y1)-, a mixture of a vinylidene group of the formula CH2=C(Y1)- and a vinylene group of the formula Y1CH=CH-and a mixture of a vinyl group, a vinylidene group of the formula CH2=C(Y1)-, and a vinylene group of the formula Y1CH=CH-;

Y1 at each occurrence independently is a C1 to C30 hydrocarbyl group;

L2 is a C1 to C32 hydrocarbylene group; and

A2 is a hydrocarbyl group comprising a hindered double bond.

4. The curable composition of claim 2 or 3, wherein the telechelic polyolefin has a weight average molecular weight from 1,000 g/mol to 1,000,000 g/mol.

5. The curable composition of claim 1 or 3, wherein the unsaturated polyolefin has a weight average molecular weight from 1,000 g/mol to 1,000,000 g/mol.

6. The curable composition of any of the previous claims, wherein the cross-linking agent is dicumyl peroxide.

7. The curable composition of any of the previous claims, wherein the curable composition further comprises (C) an additive component comprising an antioxidant.

8. The curable composition of any of the previous claims, wherein the (A) polyolefin component further comprises a low-density polyethylene polymer.

9. The curable composition of any of the previous claims, wherein the (B) curing component further comprises a coagent.

10. The curable composition of claim 9, wherein the coagent is 2,4,6,8-tetramethyl-2,4,6,8-tetravinyl cyclotetrasiloxane.

11. The curable composition of any of the previous claims,

wherein the crosslinking agent is present in an amount from greater than or equal to 1 wt% to 2 wt%, based on the total weight of the curable composition, and

wherein the curable composition has a hot creep at 150 °C or 200 °C of less than or equal to 35% after curing at 180 °C for 15 minutes.

12. The curable composition of any of claims 1-10,

wherein the crosslinking agent is present in an amount from 0.3 wt% to 0.36 wt%, based on the total weight of the curable composition, and

wherein the curable composition has a hot creep at 150 °C or 200 °C of less than or equal to 175% after curing at 180 °C for 15 minutes.

13. The curable composition of any of claims 1 and 3-12, wherein L1 of the unsaturated polyolefin of the formula A1L1 is covalently bonded to A1 through a carbon-carbon single bond.

14. The curable composition of any of claims 2-13, wherein L1 of the telechelic polyolefin of the formula A1L1L2A2 is covalently bonded to each of A1 and L2 through carbon-carbon single bonds, and wherein L2 of the telechelic polyolefin of the formula A1L1L2A2 is covalently bonded to A2 through a carbon-carbon single bond.

15. An article made from the curable composition of any of the previous claims, wherein the article is a cable insulation layer.