Acrylic polymer capstock with improved adhesion to structural plastics
US6852405B2 · kind B2 · utility
3Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Aug 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a composite sheeting comprised of polystyrene having a thin protective layer of an acrylic ester polymer and a process for producing the composite sheeting.The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.