Haze-free transparent laminate having a plasticized polyvinyl acetal sheet
US4121014A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1977 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Jul 25, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31573
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for overcoming laminate failure in laminated windows containing adjacent layers of polycarbonate and plasticized polyvinyl acetal is disclosed. The method involves applying a protective adhesive means such as a film of a polyurethane or an epoxy resin to a major surface of at least one of the sheets, assembling the sheets with said film on an interfacial surface of the assembly, and laminating the assembly at high temperature and pressure. Also disclosed are various laminate configurations containing a plasticized polyvinyl acetal-polycarbonate interfacial surface treated according to the present invention. Such laminates are useful as substantially haze-free, transparent articles, such as windows for aircraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.