Light stable polystyrene-polymethylmethacrylate laminate and method of preparation
US5091250A · kind A · utility
6Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Feb 6, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A light-stable, optically clear laminate construction and method of making it which utilizes inexpensive styrenic polymers is provided. The laminate formed exhibits strong interfacial adhesion without the need for additional glue or adhesive layers through the use of pendant functionalized hydroxyl groups incorporated into the styrenic polymer by copolymerization. These pendant hydroxyl groups react with active pendant ester groups on the other polymer layer in the laminate to form strong covalent interfacial bonds by heating the layers, preferably either in a compression molding step or during coextrusion of the layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.