Retroreflective sheeting with improved topcoat
US5514441A · kind A · utility
27Cited by
16References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Sep 30, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31609
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Retroreflective sheeting having an aliphatic polyurethane topcoat is described. The aliphatic polyurethane topcoat is obtainable from a mixture comprising (A) an aliphatic polyurethane derived from an aliphatic polyisocyanate and a polyester polyol prepared from a mixture comprising (A-1) a dicarboxylic acid component comprising isophthalic acid as the major dicarboxylic acid; and (A-2) a polyol component; and (B) cellulose acetate butyrate. The mixture also may contain (C) at least one non-reactive solvent, and optionally, (D) one or more surfactants including, for example, hydroxy-containing non-silicone surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.