Polyester film coated with metal adhesion promoting coating and having superior winding performance
US4921764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An aqueous coating composition is provided for thermoplastic films comprising PA1 (i) from 1 to 10 weight percent based upon the total weight of the coating composition, of a sulfonated copolyester consisting essentially of the polyester condensation product of the following monomers or their polyester-forming equivalents: PA2 (A) about 65 to 95 mole percent of isophthalic acid; PA2 (B) about 0 to 30 mole percent of at least one aliphatic dicarboxylic acid of the formula HOOC(CH.sub.2)--.sub.n COOH, wherein n ranges from about 1-11; PA2 (C) about 5 to about 15 mole percent of at least one sulfomonomer containing an alkali metal sulfonate group attached to a dicarboxylic aromatic nucleus; and PA2 (D) stoichiometric quantities of about 100 mole percent of at least one copolymerizable aliphatic or cycloaliphatic alkylene glycol having about from 2 to 11 carbon atoms, PA1 (ii) from 0.05 to 3 weight percent, based upon the total weight of the coating composition, of at least one water soluble alkali metal salt of an unsaturated fatty acid having from 10 to 18 carbon atoms. The aqueous coating composition of the present invention, when applied to thermoplastic films, exhibits at least eq…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.