Beverage containers coated with a water based liner
US3991216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1975 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Aug 13, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2800/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Water-based coating compositions for use as internal sanitary liners for metal containers containing beer, carbonated and noncarbonated soft drinks, and fruit juices consist essentially of aqueous dispersions of amine-solubilized interpolymers, said interpolymers being formed from substituted carboxylic acid amide units; ethylenically unsaturated acid units; hardening units from monomers such as styrene, vinyl toluene or alkyl methacrylates having from 1 to 4 carbon atoms and flexibilizing units from certain alkyl acrylates or methacrylates. The interpolymers are solubilized by neutralizing the acid units of the interpolymer with monomeric amines. In order to produce a stable composition, the amount of amine utilized in neutralizing the acid groups of the interpolymer should be sufficient to produce at least 0.200 milliequivalents of salt per gram of resin solids. These compositions provide containers with cured liners which do not impart undesirable turbidity or taste characteristics to the beer, soft drink, or fruit juices packaged therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.