Process for the production of closures for packaging containers
US5376416A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Apr 6, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The subject of the present invention is a process for the production of closures, in which process a sealing composition is applied and baked on the inside of the closures, wherein a sealing composition is applied which contains PA1 A) 20 to 95% by weight of at least one compound having on average more than two isocyanate groups per molecule and/or of a diisocyanate prepolymer, the isocyanate groups being blocked, PA1 B) 1.5 to 30% by weight of at least one diamine and/or polyamine, PA1 C) 0 to 78.5% by weight of at least one plastic and/or elastic and/or reactive organic polymer, PA1 D) 0 to 60% by weight of pigments and/or fillers, PA1 E) 0 to 50% by weight of one or more reactive diluents and PA1 F) 0 to 20% by weight of auxiliaries and additives, the sum of the proportions by weight of the components A to F being 100% in each case. The present invention also relates to the closures produced by the process according to the invention and to packaging containers which contain said closures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.