Coating composition containing a film-forming resin and a cross-linking material
Patent Information
- Application Number
- DE602021033775
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2020-03-27
- Filing Date
- 2021-03-25
- Publication Date
- 2025-07-09
- Estimated Expiration
- 2041-03-25
AI Technical Summary
Existing coatings often contain formaldehyde, which industries seek to reduce or eliminate due to health and environmental concerns, and there is a need for formaldehyde-free thermoset coatings that provide protective and decorative qualities.
A coating composition comprising a film-forming resin with active hydrogen atoms and a crosslinking material formed from a reaction mixture with ≥70% cyclic unsaturated acid anhydride and/or its diacid derivative, which reacts with alcohol, amine, thiol, or water to create a crosslinking material with an acid number of at least 100 mg KOH/g, eliminating the need for formaldehyde-based crosslinkers.
The solution provides a formaldehyde-free coating with effective crosslinking properties, ensuring suitable acid resistance and flexibility for packaging applications while maintaining decorative qualities.