ROOFING MEMBRANE ACCESSORY

1 . A roofing membrane accessory comprising:

an elastomeric layer including non-crosslinked elastomeric material, the elastomeric layer having a composition including:

(B) 100 PHR of a base polymer including ethylene propylene diene monomers (EPDM) with a sum of ethylidene norbornene (ENB) content, vinyl norbornene (VNB) content, norbornadiene content, and 1,4 hexadiene content and/or dicyclopentadiene (DCPD) content from about 0 to 9 wt. %,

(B) about 50 to 300 PHR of calcium carbonate; and

(C) about 50 to 200 PHR of dewaxed heavy paraffinic process oil(s);

a butyl-based layer adjacent to the elastomeric layer; and

a protective layer configured as a liner, the protective layer arranged adjacent to the butyl-based layer such that the butyl-based layer is interposed between the elastomeric layer and protective layers, the roofing membrane accessory having elongation at break of about 400% to 2200%.

2 . The roofing membrane accessory of claim 1 wherein the sum of ethylidene norbornene (ENB) content, vinyl norbornene (VNB) content, norbornadiene content, and 1,4 hexadiene content and dicyclopentadiene (DCPD) is about 2 to 8.7 wt. %.

3 . The roofing membrane accessory of claim 1 wherein base polymer including ethylene propylene diene monomers (EPDM) has a ethylidene norbornene (ENB) content from about 0 to 9 wt. %

4 . The roofing membrane accessory of claim 1 wherein the final level of crosslinking is no more than about 15%.

5 . The roofing membrane accessory of claim 1 wherein the roofing membrane accessory has a tensile strength of about 0.14 to 0.80 MPa according to ASTM D412 A.

6 . The roofing membrane accessory of claim 1 wherein the calcium carbonate is present at 80 to 220 PHR.

7 . The roofing membrane accessory of claim 1 wherein the base polymer has an ethylene content of about 48 to 75 wt. %.

8 . The roofing membrane accessory of claim 1 wherein the roofing membrane accessory remains in an uncured non-crosslinked state at least for a time period after installation.

9 . A roofing membrane accessory comprising:

a non-crosslinked elastomeric material having a composition including:

(A) 40 to 200 PHR of a base polymer including ethylene propylene diene monomer (EPDM) having a sum of ethylidene norboniene (ENB) content, vinyl norboniene (VNB) content, norbornadiene content, and 1,4 hexadiene content and/or dicyclopentadiene (DCPD) content from about 0 to 9 wt. %,

(B) (B) about 50 to 300 PHR of calcium carbonate;

(C) about 50 to 200 PHR of a dewaxed heavy paraffinic process oil(s); and

(D) about 10 to 40 PHR of a silane-grafted elastomer,

the non-crosslinked elastomeric material being free of a crosslinking catalyst and having Mooney viscosity (1+4 at 100° C.) of about 10 to 60.

10 . The roofing membrane accessory of claim 9 wherein the EPDM is present at 100 PHR.

11 . The roofing membrane accessory of claim 9 wherein base polymer including ethylene propylene diene monomers (EPDM) has a ethylidene norbornene (ENB) content from about 0 to 9 wt %.

12 . The roofing membrane accessory of claim 9 wherein the sum of ethylidene norbornene (ENB) content, vinyl norbornene (VNB) content, norbornadiene content, and/or 1,4 hexadiene content and dicyclopentadiene (DCPD) content is from 4.5 to 6 wt. %.

13 . The roofing membrane accessory of claim 9 wherein base polymer including ethylene propylene diene monomers (EPDM) has a ethylidene norbornene (ENB) content from about 0 to 9 wt %.

14 . The roofing membrane accessory of claim 9 wherein the silane-grafted elastomer include a silane-grafted polymer or copolymer of an olefin selected from the group consisting of aliphatic C 2 -C 20 α-olefins.

15 . The roofing membrane accessory of claim 14 wherein the aliphatic C 2 -C 20 α-olefins are selected from the group consisting of ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene and 1-eicosene.

16 . The roofing membrane accessory of claim 15 wherein the silane-grafted elastomer is catalyst free.

17 . The roofing membrane accessory of claim 9 wherein the silane-grafted elastomer include a silane-grafted copolymer of an olefin selected from the group consisting of ethylene-1-butene copolymer, ethylene propylene copolymer, ethylene/α-olefin copolymer, propylene/α-olefin copolymer, or a combination thereof.

18 . A roofing accessory comprising:

100 PHR of a base polymer,

about 50 to 300 PHR of calcium carbonate;

about 50 to 200 PHR of a dewaxed heavy paraffinic process oil(s); and

about 6 to 20 PHR a titanium dioxide,

the roofing accessory having a colorimetric brightness value L* of about 96.5 to 98 and tone value b* of about 1.5 to 2.5, measured according to D.

19 . The roofing accessory of claim 18 wherein the base polymer includes ethylene propylene diene monomer (EPDM) having a sum of ethylidene norbornene (ENB) content, vinyl norbornene (VNB) content, norbornadiene content, and 1,4 hexadiene content and/or dicyclopentadiene (DCPD) content from about 0 to 9 wt. %.

20 . The roofing accessory of claim 18 wherein base polymer including ethylene propylene diene monomers (EPDM) has a ethylidene norbornene (ENB) content from about 0 to 9%.

21 . The roofing accessory of claim 18 wherein the base polymer includes an olefin block copolymer free of diene units formed from polymerization of ethylene or propylene monomers with an aliphatic C 2 -C 20 α-olefin.

22 . The roofing accessory of claim 21 wherein the aliphatic C 2 -C 20 α-olefin is selected from the group consisting of ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene and 1-eicosene.

23 . The roofing accessory of claim 18 wherein the roofing accessory is free of a catalyst and/or curative.

24 . The roofing accessory of claim 18 wherein the base polymer includes ethylene propylene rubber.