THERMOPLASTIC ELASTOMER COMPOSITION AND PNEUMATIC TIRE AND HOSE USING THE SAME

• Main Authors: KAWAGUCHI TAKESHI, AOYANAGI YOSHIHIRO, OZAWA OSAMU, KURODA NORIAKI, KAWAMO TETSUJI, WATANABE JIRO
• Format: Patent
• Language: English
• Published: 27.01.1998
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To obtain a thermoplastic elastomer composition capable of forming an elastomer component into a discontinuous phase and a thermoplastic resin component into a continuous phase within a high elastomer content range and thereby having an excellent softness and gas permeating resistance. SOLUTION: This composition comprises (A) at least one kind of thermoplastic resin component having <=25×10<-12> cc.cm/cm .sec.cmHg air permeability coefficient and (B) at least one kind of an elastomer component having <=1.0×10<-10> cc.cm/cm .sec.cmHg air permeability coefficient with the proviso that a viscosity ηm of the component A and the viscosity ηd of the component B at the kneading temperature satisfy the formula (-0.0518.|ΔSP|+0.90)/ m <(ηd /ηm ) (ΔSP is a difference of solubility parameters between the elastomer component and the thermoplastic resin component; m is a volume fraction of the thermoplastic resin component).