Laminating adhesive for film/paper microwavable products
US4911960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Wet laminating adhesives capable of withstanding the stresses encountered during heat sealing operations are prepared from emulsion copolymers consisting essentially of 45 to 80% by weight of a vinyl ester of an alkanoic acid, 10 to 30% ethylene, 5 to 30% of dialkyl maleate, 0.5 to 2% of an N-methylol containing comonomer and 0.5 to 4% of an ethylenically unsaturated mono- or di-carboxylic acid. These specific emulsion copolymers are prepared utilizing standard emulsion polymerization procedures with hydroxyethylcellulose or polyvinyl alcohol as a protective colloid. The emulsion polymers thus produced provide superior wet laminating adhesive properties for use in substrates which are to be formed into microwavable packages or bags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.