Free flowing powder composition, process for its preparation and homogeneous layer derived therefrom
US6013717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1996 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jun 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Free flowing powder composition with a particle size of 800 .mu.m or less, comprising PA1 (a) 100 parts by weight of a block copolymer, comprising at least one poly (predominantly monovinyl aromatic hydrocarbon) block and at least one substantially hydrogenated poly(predominantly conjugated diene) block and having a monovinyl aromatic hydrocarbon content in the range of from 10 to 60% by weight, preferably 10 to 35% by weight, based on total weight of block copolymer; PA1 (b) 100 to 200 and preferably from 100 to 150, parts by weight of a plasticiser; PA1 (c) 50 to 100, preferably 70 to 90, parts by weight of a resin, which is compatible with the substantially hydrogenated poly(conjugated diene) block; and optionally PA1 (d) a dusting agent in amount of from 0 to 10% by weight and preferably 0.5 to 3% by weight, based on total weight of composition; process for its preparation and flexible elastic sterilisable homogeneous layers derived from it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.