PNEUMATIC TIRE WITH POST CURE SEALANT LAYER

• Main Authors: KASZAS, Gabor, RACHITA, Michael Joseph
• Format: Patent
• Language: English; French; German
• Published: 26.04.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

A pneumatic tire (10) comprising a radially outer circumferential rubber tread (14) disposed on a supporting carcass (17) and a sealant layer (20) forming at least locally a radially inner surface of the tire (10) is disclosed. The sealant layer (20) comprises 100 parts by weight of an ionomer and from 100 to 900 parts by weight, per 100 parts by weight of ionomer (phr), of a diluent. Also, a method of manufacturing a sealant composition for use in a sealant layer (20) of a pneumatic tire (10) is disclosed. The method comprises preparing in situ in a mixer a mixture of a diluent and an ionomer, wherein the ionomer is the reaction product of a halobutyl rubber and a nucleophile of formula I where A is a nitrogen or phosphorus; and R 1 , R 2 and R 3 are selected from the group consisting of linear or branched C 1 -C 18 alkyl substituents, an aryl substituent which is monocyclic or composed of fused C 4 -C 8 rings, and/or a hetero atom preferably selected from B, N, O, Si, P and S.