US 12,420,507 B2
Self-sealing pneumatic tire with noise suppression characteristics
George Jim Papakonstantopoulos, Medina, OH (US); Michael Lawrence Gersman, Cleveland, OH (US); and Robin Lamgaday, Copley, OH (US)
Assigned to The Goodyear Tire & Rubber Company, Akron, OH (US)
Filed by THE GOODYEAR TIRE & RUBBER COMPANY, Akron, OH (US)
Filed on Sep. 19, 2022, as Appl. No. 17/947,506.
Claims priority of provisional application 63/252,677, filed on Oct. 6, 2021.
Prior Publication US 2023/0104547 A1, Apr. 6, 2023
Int. Cl. B60C 19/12 (2006.01); B29D 30/06 (2006.01); B60C 19/00 (2006.01); B60C 5/00 (2006.01)
CPC B29D 30/0685 (2013.01) [B60C 19/002 (2013.01); B29D 2030/0686 (2013.01); B60C 5/002 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A low noise, self-sealing, uncured pneumatic tire which is comprised of a generally toroidal-shaped supporting carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead, sidewalls extending radially from and connecting said tread to said beads, and a sealant/noise reduction layer which is disposed inwardly from the supporting carcass and is the innermost layer of the tire, wherein said circumferential tread is adapted to be ground-contacting, wherein the uncured pneumatic tire is void of an innerliner, wherein the sealant/noise reduction layer is comprised of a dispersed phase and a continuous phase, wherein the dispersed phase is comprised of a butyl rubber as a pre-sealant material which breaks down at tire vulcanization temperatures to produce a sealant material, wherein the dispersed phase is further comprised of from 0.5 phr to 7 phr of a peroxide based upon active peroxide, and wherein the continuous phase is comprised of a halobutyl rubber that foams during vulcanization.