AAEMA (acetoacetoxyethyl methacrylate) is an acrylic monomer used as a copolymer in coatings and adhesive applications.
AAEMA from Arxada (formerly Lonza) is 2-(Acetoacetoxy)ethyl methacrylate, CAS number 21282-97-3. Acetoacetoxyethyl methacrylate is also referred to as AAEM. AAEMA is an acetoacetate acrylic monomer used to make acrylic resins for a wide variety of coatings and adhesive applications. Acetoacetates have excellent cross-linking versatility and lower the resin glass transition temperature, decrease solution viscosity for higher-solids coatings, and improve adhesion for metal coatings. AAEMA has excellent hydrolytic stability and weatherability, low viscosity, and low water absorption. AAEMA promotes adhesion to metal, mineral, and wood surfaces. AAEMA can also replace styrene in the production of unsaturated polyesters.
Appearance: Clear liquid
Color: Colorless to yellowish
Assay (GC): >95.0% area
2-Hydroxyethyl methacrylate (GC): <2.5% area Water (KF): <0.10%w/w (KF)
Transparence (440 nm, 10 mm): >85.0%
Transparence (440 nm, 50 mm): >70.0%
Acid value (titr.): 3.0–8.0 mg KOH/g
Color (Gardner): <1.0
Primary Chemistry: 2-(Acetoacetoxy)ethyl methacrylate
Solubility in water and organic solvents
Hydrolytic stability
Good weatherability
Promotes adhesion in metal coatings
Lowers polymer Tg
Decreases viscosity for high-solids, low-VOC coatings
Reactive methylene group and ketone carbonyl groups can be reacted via cross-linking or for polymer modification
Low color
Yellowing polyester resin
Increased polyester resin viscosity
High resin Tg
Poor hydrolytic stability from acrylic resin
Poor weatherability from acrylic resin
Poor resin adhesion for metal coatings applications
Polymers
Adhesives
Industrial coatings
Architectural coatings
Gel coats
Colorants
Learn why AAEMA is widely used as an acrylic monomer for making resins for paints and coatings applications.
Arxada Diketene Derivatives offer several advantages to the composites industry as copromoters in the production of unsaturated polyesters resins for gel coats.
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