Bilayer laminate and preformed sheet for use therein
US4652494A · kind A · utility
51Cited by
5References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Jul 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31601
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Preformed, energy-absorbing, scratch resistant, optical, flexible, and self-healing polyurethane sheets, which are adhesive under the influence of heat and pressure; bilayer glazing laminates and bilayer safety windshields including said sheets; wherein said polyurethane sheet is prepared preferably by reactive-casting on a horizontal support and formed preferably from a polyisocyanate monomer including about 2 to about 10 wt. % of urea groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.