Pneumatic tire having a rubber component containing N, N'-(m-phenylene) bismaleamic acid
View Patent ↗The present invention relates to a pneumatic tire having a rubber component comprised of (A) 100 parts by weight of at least one elastomer containing olefinic unsaturation; (B) 10 to 120 phr of a filler selected from carbon black and silica; (C) 0.1 to 10 phr of N,N′-(m-phenylene)bismaleamic acid; (D) 0.1 to 0.5 phr of zinc dibenzyl dithiocarbamate; and (E) 0.1 to 5 phr of an additional cure accelerator.
1. A pneumatic tire having a rubber component comprised of
(A) 100 parts by weight of at least one elastomer containing olefinic unsaturation;
(B) 10 to 120 phr of a filler selected from carbon black and silica;
(C) 0.5 to 5 phr of N,N′-(m-phenylene)bismaleamic acid;
(D) 0.1 to 0.5 phr of zinc dibenzyl dithiocarbamate; and
(E) 0.1 to 1 phr of a sulfenamide.
2. The pneumatic tire of claim 1 wherein said elastomer containing olefinic unsaturation is selected from the group consisting of natural rubber, neoprene, polyisoprene, butyl rubber, polybutadiene, styrene-butadiene copolymer, styrene/isoprene/butadiene rubber, methyl methacrylate-butadiene copolymer, isoprene-styrene copolymer, methyl methacrylate-isoprene copolymer, acrylonitrile-isoprene copolymer, acrylonitrile-butadiene copolymer, EPDM and mixtures thereof.
3. The pneumatic tire of claim 1 wherein said silica is precipitated silica.
4. The pneumatic tire of claim 1 wherein a sulfur containing organosilicon compound is present in said tread and is of the formula:
Z-Alk-S n -Alk-Z
in which Z is selected from the group consisting of
where R 1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl; R 2 is alkoxy of 1 to 8 carbon atoms, or cycloalkoxy of 5 to 8 carbon atoms; Alk is a divalent hydrocarbon of 1 to 18 carbon atoms, and n is an integer of 2 to 8.
5. The pneumatic tire of claim 1 wherein said silica is present in an amount ranging from 20 to 80 phr.
6. The pneumatic tire of claim 1 wherein said carbon black is present in an amount ranging from 20 to 80 phr.
7. The pneumatic tire of claim 1 wherein said tire has
(A) a carcass reinforced with radially-extending cords,
(B) a circumferentially-extending sidewall portion, and
(C) a tread section.
8. The pneumatic tire of claim 1 wherein said rubber component is part of the carcass.
9. The pneumatic tire of claim 1 wherein said rubber component is selected from the group consisting of the apex, wirecoat, ply coat, squeegee compounds, gum strips, chafer, reinforcing sidewall inserts and exposed sidewall.
10. The pneumatic tire of claim 1 wherein said rubber component is part of the tread section.
11. The pneumatic tire of claim 1 wherein said rubber component is the tread cap.
12. The pneumatic tire of claim 1 wherein said rubber component is the tread base.
13. The pneumatic tire of claim 1 wherein said rubber component is an innerliner.