Bonded composites of a thermoplastic elastomeric blend with a vulcanized epom or epm rubber composition
US4537825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Oct 17, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a novel bonded composite of PA0 (i) a thermoplastic elastomeric blend of vulcanized EPDM particles not more than 50 microns in size disposed in a thermoplastic linear crystalline polyolefin continuous phase, with PA0 (ii) a vulcanized EPDM or EPM rubber composition containing less than 50% (preferably 5% to less than 40% by volume of rubber, comprises fusing the thermoplastic elastomeric blend and solidifying it in contact with the vulcanized rubber composition in the absence of an adhesive interlayer. Preferably the blend is extruded onto the vulcanized rubber composition. Preferably the linear crystalline polyolefin in the thermoplastic blend has a melt flow index of at least 0.25 when measured according to the test conditions ASTM D 1238-65T and is selected from polypropylene, propylene copolymers, high density polyethylene and high density ethylene copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.