Thermofusible elastomer compositions
US6072004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Nov 25, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a thermofusible elastomer composition comprising: PA1 (a) 100 phr of a selectively hydrogenated block copolymer component comprising an A'B' block copolymer and a multiblock copolymer having at least two end blocks A and at least one mid block B wherein the A' and A blocks are monoalkenyl arene polymer blocks and the B' and B blocks are substantially completely hydrogenated conjugated diene polymer blocks, the number average molecular weight of the A' and A blocks are between about 3,000 and about 7,000 and the monoalkenyl arene content of the multiblock copolymer is between about 7% and about 22% by weight; PA1 (b) 20 to 50 phr of at least one high melt flow polyolefin; PA1 (c) 0 to 19 phr of a plasticizing oil selected from naphthenic oils and paraffinic oils; and PA1 (d) 0 to 40 phr of at least one poly(conjugated diene) block compatible resin wherein the elastomer composition has a particle size of 1400 .mu.m or less. This composition is used in low shear processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.