Foam compositions from blend of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic interpolymers
US6767931B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2003 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jan 26, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A foamable polymer composition is described which comprises: a1) a substantially random interpolymer produced from: i) one or more &agr;-olefin monomers; and ii) one or more vinyl or vinylidene aromatic monomers and/or one or more sterically hindered aliphatic or cycloaliphiatic vinyl or vinylidene monomers; and optionally iii) other polymerizable ethylenically unsaturated monomer(s); or a2) an interpolymer comprising polymerized units of ethylene and vinyl acetate; or a3) a combination of the polymers a1) and a2); and b) a polydiorganosiloxane having a viscosity of at least one million centistoke at 25° C.; and c) a foaming agent. The polydiorganosiloxane is useful for improving the abrasion resistance of foams comprising the substantially random interpolymer a1) and/or the ethylene/vinyl acetate interpolymer a2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.