BARRIER COMPOSITION COMPRISING A TALC PARTICULATE
A talc particulate having a d 50 ranging from about 7 μm to about 13 μm and a BET surface area equal to or less than about 23 m 2 /g, barrier compositions and polymeric compositions comprising said talc particulate, use of said talc particulate to decrease permeability of a composition, use of said talc particulate in an inner lining of a tire, methods of making said barrier compositions, polymeric compositions and tire inner linings.
1 . A barrier composition comprising a talc particulate having a d 50 ranging from about 7 μm to about 13 μm and a BET surface area equal to or less than about 23 m 2 /g.
2 . The barrier composition of claim 1 , wherein the talc particulate has a d 50 ranging from about 8 μm to about 12 μm.
3 . The barrier composition of claim 1 , wherein the talc particulate has a BET surface area ranging from about 8 to about 22 m 2 /g.
4 . The barrier composition of claim 1 , wherein the talc particulate has a lamellarity index less than about 5.
5 . The barrier composition of claim 1 , wherein the talc particulate has a d 95 ranging from about 20 μm to about 36 μm.
6 . The barrier composition of claim 1 , wherein the talc particulate has a d 75 ranging from about 10 μm to about 22 μm.
7 . The barrier composition of claim 1 , wherein the talc particulate has a d 25 ranging from about 4 μm to about 9 μm.
8 . The barrier composition of claim 1 , wherein the talc particulate is or comprises a wet milled talc.
9 . A polymer composition comprising an elastomer and a talc particulate according to claim 1 .
10 . The polymer composition of claim 9 , wherein the amount of talc particulate in the polymer composition ranges from about 10 to about 80 phr.
11 . The polymer composition of claim 9 , further comprising carbon black.
12 . The polymer composition of claim 10 , further comprising, carbon black, wherein the amount of carbon black in the polymer composition ranges from about 10 to about 100 phr.
13 . The polymer composition of claim 11 , wherein the total amount of talc and carbon black in the polymer composition ranges from about 10 to about 40 vol %.
14 . The polymer composition of claim 9 , wherein the polymer composition has an oxygen transmission rate equal to or less than about 180 cm 3 /m 2 /day.
15 . The polymer composition of claim 9 , wherein the polymer composition has a tensile strength of at least about 6 MPa.
16 . The polymer composition of claim 9 , wherein the polymer composition has an elongation at break of at least about 700%.
17 . The polymer composition of claim 9 , wherein the polymer composition has an elastic modulus (100%) of at least about 0.6 MPa.
18 . The polymer composition of claim 9 , wherein the polymer composition has an elastic modulus (300%) of at least about 1.8 MPa.
19 . The polymer composition of claim 9 , wherein the polymer composition has a Shore A hardness of at least about 35.
20 . A tire having an inner lining comprising the polymer composition of claim 9 .
21 - 24 . (canceled)