Rubber blend for the inner liner of vehicle tires
View Patent ↗A rubber blend containing (a) 40-100 phr (parts by weight based on 100 parts by weight of the total rubber mass) of at least one halobutyl rubber; (b) 5-70 phr of at least one delaminated talc having a BET surface area according to DIN 66131 of 10-40 m 2 /g, an average particle size (D 50 ) of 4-8 μm, determined by laser diffraction measurement, and a lamellarity index of 3-15; and (c) 10-100 phr of at least one carbon black having a CTAB surface area according to ASTM-D 3765 of 10-25 m 2 /g and a DBP number according to ASTM-D 2414 of 50 to 160 mL/100 g.14. Also, provided are vulcanizates, pneumatic vehicle tires and methods of producing rubber blends.
1. A rubber blend containing:
(a) 40-100 phr (parts by weight based on 100 parts by weight of the total rubber mass) of at least one halobutyl rubber;
(b) 5-70 phr of at least one delaminated talc having a BET surface area according to DIN 66131 of 10-40 m 2 /g, an average particle size (D 50 ) of 4-8 μm, determined by laser diffraction measurement, and a lamellarity index of 3-15; and
(c) 10-100 phr of at least one carbon black having a CTAB surface area according to ASTM-D 3765 of 10-25 m 2 /g and a DBP number according to ASTM-D 2414 of 50 to 160 mL/100 g.
2. The rubber blend as claimed in claim 1 , comprising 10-40 phr of the at least one delaminated talc.
3. The rubber blend as claimed in claim 1 , comprising 30-60 phr of the at least one carbon black.
4. The rubber blend as claimed in claim 2 , comprising 30-60 phr of the at least one carbon black.
5. The rubber blend as claimed in claim 1 , wherein the at least one carbon black has CTAB surface area according to ASTM-D 3765 of 14-24 m 2 /g and a DBP number according to ASTM-D 2414 of 70 to 90 ml/100 g.
6. The rubber blend as claimed in claim 2 , wherein the at least one carbon black has CTAB surface area according to ASTM-D 3765 of 14-24 m 2 /g and a DBP number according to ASTM-D 2414 of 70 to 90 ml/100 g.
7. The rubber blend as claimed in claim 3 , wherein the at least one carbon black has CTAB surface area according to ASTM-D 3765 of 14-24 m 2 /g and a DBP number according to ASTM-D 2414 of 70 to 90 ml/100 g.
8. The rubber blend as claimed in claim 4 , wherein the at least one carbon black has CTAB surface area according to ASTM-D 3765 of 14-24 m 2 /g and a DBP number according to ASTM-D 2414 of 70 to 90 ml/100 g.
9. The rubber blend according to claim 1 further including up to not more than 60 phr of at least one further rubber selected from butyl rubber, polybutadiene, styrene-butadiene copolymer, 3,4-polyisoprene, cis-1,4-polyisoprene, natural rubber, styrene-isoprene copolymer and styrene-isoprene-butadiene terpolymer.
10. The rubber blend according to claim 2 further including up to not more than 60 phr of at least one further rubber selected from butyl rubber, polybutadiene, styrene-butadiene copolymer, 3,4-polyisoprene, cis-1,4-polyisoprene, natural rubber, styrene-isoprene copolymer and styrene-isoprene-butadiene terpolymer.
11. The rubber blend according to claim 3 further including up to not more than 60 phr of at least one further rubber selected from butyl rubber, polybutadiene, styrene-butadiene copolymer, 3,4-polyisoprene, cis-1,4-polyisoprene, natural rubber, styrene-isoprene copolymer and styrene-isoprene-butadiene terpolymer.
12. The rubber blend according to claim 4 further including up to not more than 60 phr of at least one further rubber selected from butyl rubber, polybutadiene, styrene-butadiene copolymer, 3,4-polyisoprene, cis-1,4-polyisoprene, natural rubber, styrene-isoprene copolymer and styrene-isoprene-butadiene terpolymer.
13. The rubber blend according to claim 5 further including up to not more than 60 phr of at least one further rubber selected from butyl rubber, polybutadiene, styrene-butadiene copolymer, 3,4-polyisoprene, cis-1,4-polyisoprene, natural rubber, styrene-isoprene copolymer and styrene-isoprene-butadiene terpolymer.
14. An inner liner of a pneumatic vehicle tire comprising a rubber blend as claimed in claim 1 .
15. A vulcanizate comprising a vulcanized rubber blend according to claim 1 .
16. A vulcanizate comprising a vulcanized rubber blend according to claim 4 .
17. A vulcanizate comprising a vulcanized rubber blend according to claim 2 .
18. A vulcanizate comprising a vulcanized rubber blend according to claim 3 .
19. A pneumatic vehicle tire having an inner liner which is based on a rubber blend as claimed in claim 1 .
20. A pneumatic vehicle tire having an inner liner which is based on a rubber blend as claimed in claim 2 .
21. A pneumatic vehicle tire having an inner liner which is based on a rubber blend as claimed in claim 3 .
22. A pneumatic vehicle tire having an inner liner which is based on a rubber blend as claimed in claim 4 .
23. A method of producing a rubber blend comprising combining:
(a) 40-100 phr (parts by weight based on 100 parts by weight of the total rubber mass) of at least one halobutyl rubber;
(b) 5-70 phr of at least one delaminated talc having a BET surface area according to DIN 66131 of 10-40 m 2 /g, an average particle size (D 50 ) of 4-8 μm, determined by laser diffraction measurement, and a lamellarity index of 3-15; and
(c) 10-100 phr of at least one carbon black having a CTAB surface area according to ASTM-D 3765 of 10-25 m 2 /g and a DBP number according to ASTM-D 2414 of 50 to 160 mL/100 g.
24. The method as claimed in claim 23 , wherein the rubber blend is vulcanized.
25. The method as claimed in claim 24 , wherein the vulcanized rubber blend is formed into an inner liner.
26. The method as claimed in claim 25 , wherein the inner liner is included in a pneumatic vehicle tire.