Weather-resistant, high-impact strength acrylic compositions
US7294399B2 · kind B2 · utility
4Cited by
18References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Jun 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is an improved weatherable thermoplastic composition. The composition is comprised of a copolymer of an alkyl acrylate or alkyl methacrylate and (methyl)methacrylate and a multi-stage, sequentially-polymerized impact modifier polymer. The copolymer is characterized by greater than 15 weight percent alkyl acrylate content. The multi-stage, sequentially-polymerized impact modifier is characterized by an elastomer stage, which is 55 percent by weight or greater of the impact modifier composition and is minimally crosslinked. The thermoplastic composition can be used in a wide range of film, sheet, or molded applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.