Abstract
Anhydride functional copolymers, usually prepared from maleic anhydride, styrene and acrylic monomers, are an increasingly important group of co-reactants for polyol and epoxide crosslinked coatings. Aliphatic tertiary amines, the preferred catalysts for crosslinking, generate strong colors when they are added to many of the polymers. Color formation was investigated using tristimulus colorimetry to determine the influence of composition of the anhydride copolymer and the process for copolymer preparation. A structural feature of the copolymers, tentatively identified as unsaturated anhydride end groups from termination by disproportionation, and residual maleic anhydride were found to be major contributors to amine-activated color. Partial hydrolysis of the polymer moderates color development, but increases solution viscosity. Acid level increases and anhydride content decreases as more n-butyl methacrylate is included in the copolymers, possibly because water is formed during the initiation process with this monomer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
