Primer coating composition
US10597554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2014 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Jan 18, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F230/085
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a primer coating composition that includes, (a) a (meth)acrylic polymer that includes hydroxyl groups, and which has a Tg of at least 30° C. The primer coating composition further includes, (b) a polyester that includes hydroxyl groups, and which has a weight average molecular weight of less than 3000, and a hydroxyl value of at least 100. The primer coating composition also includes, (c) a crosslinking agent having at least two isocyanate groups. The present invention also relates to a coated article that includes a repaired area that includes a primer coating formed from the primer coating composition of the present invention. The primer coating compositions, in accordance with some embodiments, provide reduced or minimal ringing defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.