Kneaded rubber for expandable formulation
US6268428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Jul 15, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A kneaded rubber for expandable formulation, such as a material for die forming. The polymer components in the kneaded rubber principally comprise a polymer alloy, further comprising a sea phase of a ethylene/.alpha.-olefin/non-olefin/non-conjugated polyene terpolymer rubber and an island phase of a polyolefin resin. The polyolefin resin wholly or largely comprises a monomer C.sub.4 -C.sub.6 .alpha.-olefin and has an MFR of at least 15 g/10 min at 190.degree. C. under a load of 2.196 kgf according to ASTMD 1238. The kneaded rubber satisfies the following Mooney viscosity profile formula according to JIS K 6300: EQU (ML.sub.1+4 80.degree. C.)-(ML.sub.1+4 160.degree. C.).gtoreq.15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.