Rubber replacement material comprising terpolymers
The present invention provides a polyolefin composition, said composition comprising a terpolymer comprising a cross-linkable polyolefin comprising hydrolysable silane groups and a polar comonomer, the polyolefin composition further comprising a cross-linking catalyst and a silicon containing compound. The polar comonomer Is present in an amount of 5-35 wt %.
1. A polyolefin composition, said composition comprising:
a terpolymer comprising
(A) a cross-linkable polyolefin comprising hydrolysable silane groups, and
(C) a polar comonomer,
wherein the polar comonomer (C) is present in an amount of 5-35 wt % based on the total amount of the terpolymer,
wherein said polyolefin composition further comprises:
(B) a cross-linking catalyst, and
(D) a silicon containing compound; and
(E) a foaming agent;
wherein said composition have Shore A values from 60 to 85; and wherein a compression set of said polyolefin composition is 15-40% at 100° C.
2. The polyolefin composition according to claim 1 , wherein the polar comonomer is present in an amount of 20-31 wt %.
3. The polyolefin composition according to claim 1 , wherein the polar comonomer is methyl acrylate.
4. The polyolefin composition according to claim 1 , wherein said cross-linking catalyst is a Brönsted acid.
5. The polyolefin composition according to claim 1 , wherein said cross-linking catalyst is a tin catalyst.
6. The polyolefin composition according to claim 1 , wherein said composition have Shore A values from 61 to 82.
7. The polyolefin composition according to claim 1 , wherein the compression set of said polyolefin composition is 18-35%, at 100° C.
8. The polyolefin composition according to claim 1 , wherein the compression set of said polyolefin composition is 18-30%, at 23° C.
9. The polyolefin composition according to claim 1 , wherein the compression set of said polyolefin composition is 5-15% at −25° C.
10. The polyolefin composition according to any one of the preceding claims, wherein MFR 2 of said composition is 1-40 g/10 min.
11. The polyolefin composition according to claim 1 , wherein said composition further comprises an antioxidant.
12. The polyolefin composition according to claim 1 , wherein said composition is produced in a high-pressure reactor.
13. A method of manufacturing a weather seal comprising the polyolefin composition according to claim 1 , said method comprising the steps of:
extruding the polyolefin composition according to claim 1 into a profile
cutting the extruded profile.
14. A weather seal comprising a polyolefin composition according to claim 1 .
15. A method of manufacturing a roofing membrane comprising the polyolefin composition according to claim 1 , said method comprising the steps of:
extruding the polyolefin composition according to claim 1 to form a top layer and a bottom layer;
calendaring a scrim layer between the top and the bottom layers to form an uncured roofing membrane element; and
crosslinking the polyolefin composition of the top and the bottom layers in the uncured roofing membrane element at a curing temperature and a curing humidity to form the single ply roofing membrane.
16. A roofing membrane comprising a polyolefin composition according to claim 1 .
17. A method of manufacturing a shoe sole comprising the polyolefin composition according to claim 1 , said method comprising the steps of:
extruding the polyolefin composition according to claim 1 and a foaming agent to form a cross-linkable polyolefin blend;
injection or compression moulding the crosslinkable polyolefin blend into a shoe sole element; and
crosslinking the crosslinkable polyolefin blend at a temperature greater than 150° C. and an ambient humidity to form a shoe sole.
18. A shoe sole comprising a polyolefin composition according to claim 1 .
19. A method of manufacturing a hose comprising the polyolefin composition according to claim 1 , said method comprising the steps of:
extruding the terpolymer, the cross-linking catalyst and the silicone containing compound, and optionally a filler together to form an extruded crosslinkable polyolefin composition;
cooling the extruded crosslinkable polyolefin composition;
forming the extruded crosslinkable polyolefin composition into a hose element; and
crosslinking the composition of the hose element to form the hose.
20. A hose comprising a polyolefin composition according to claim 1 .