Thermoplastic elastomer composition and process for producing the same and pneumatic tire and hose using the same
US7275574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2004 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Dec 13, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T152/10495
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic elastomer composition dynamically vulcanized with a 50 to 95% gelation rate has superior heat resistance, durability, and air permeation prevention, is flexible and usable as a pneumatic tire air permeation preventive layer. A composition having reduced domain rubber particle size is produced from a high rubber ratio material by mixing composition (C) under melt viscosities ratio of rubber composition (A)/resin (B) of 0.8 to 1.2 and formula (φA/φB)×(ηB/ηA)<1.0 under melt viscosities ratio of rubber composition (D)/composition (C) of 0.8 to 1.2 and formula (φD/φC)×(ηC/ηD)<1.0, wherein φA, φB, φC and φD are volume fractions of rubber composition (A) and resin (B), composition (C) and rubber composition (D), respectively, ηA ηB, ηC, and ηD are melt viscosities of rubber composition (A), resin (B), composition (C), and rubber composition (D), respectively. The thermoplastic elastomer composition may have an elastomer composition (A) dispersion phase and a thermoplastic resin composition (B) matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.