Heat resistant ovenable paperboard
US4543280A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1984 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Mar 5, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A pigmented coating composition comprising a pigment consisting of kaolin clay or TiO.sub.2 or the mixture thereof, or a pigment wherein Al(OH).sub.3 is further blended therein, and also comprising an adhesive consisting of crosslinkable ethylenevinylacetate copolymer aqueous emulsion combined with a crosslinker or of crosslinkable polyacrylate copolymer aqueous emulsion combined with a crosslinker of water-soluble polymaidepolyurea resin and the pigment above and the mixed adhesive are formulated in a ratio of 85:15 to 70:30 as coating composition. This pigmented adhesive composition is primed on the substrate paperboard. Thereby finished ovenable paperboards, being capable of retaining the brightness at least 45% against the heat-treatment of 250.degree. C. for 20 minutes, is free from scorch even in an electrically heating oven and is excellent in adhesion to extrusion-laminating plastic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.