Thermoplastic elastomer based on olefin and process for producing the same
US6221963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic elastomer based on olefin which can be produced simply by melt-kneading 5-60% by weight of a polyethylene resin (A) together with 40-95% by weight of an ethylene/.alpha.-olefin copolymer (B) with optional subsidiary component(s) before the kneaded mass is molded into a formed product, the said elastomer being capable of recycling for reclamation and exhibiting the following characteristics 1 to 3 namnely, EQU 9.ltoreq.Y-0.43 X.ltoreq.27 (1) PA1 1 in which X denotes the JIS A-hardness value (a dimensionless value) of the thermoplastic elastomer based on olefin determined according to the prescription of JIS K 6301 and Y represents the permanent compressive strain value (expressed by %) of the thermoplastic elastomer based on olefin determined according to the prescription of JIS K 6301 under a condition of 70.degree. C..times.22 hours, PA1 2 tensile strength in the raqnge from 5 to 30 MPa and PA1 3 a permanent elongation of 18% or less determined according to the prescription of JIS K 6301.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.