Because they are slow to react, oxygen inhibits cure on surfaces, creating a sticky layer known as an "oxygen inhibition layer".Mixtures of methacrylic polymers are the most common materials for making composites to be used as resins for dental and cosmetic applications. ![]() While ethyl methacrylate is fast reacting and builds a robust, stabilized color enhancement, the monomers utilized to make odorless products are slower reacting and are not as color stable. * Note about the odorless acrylic system: Odorless acrylics will be more precisely identified as "low odor monomer" ( as they continue to emit vapors, although they are hard to smell), and they do not use ethyl methacrylate. Wetting agents (optional): Chemical additives which make the compatibility of the liquid better with solid surfaces, thus improving adhesion.įlow modifiers (optional): Ingredients help to minimize brush strokes over the surface, causing it to be self-leveling. UV absorbers (optional): Enhancers that absorb ultraviolet light ( preventing color yellowing ) and transform it into blue light or heat.Ĭrosslinkers (optional): Additives that enable monomers to bind to each other in a 3D network-like pattern, a stronger structure compared to the row of head-tail connections which they would otherwise create. (Accelerates the breakdown process of the initiator in the acrylic powder). Inhibitors: These ingredients, usually hydroquinone, hydroquinone monomethyl ether, or butylated hydroxytoluene, prevent the monomers from bonding into polymeric chains prior to blending with the powder, preventing pre-mature curing.Ĭatalyst: Compound that causes a reaction to occur more quickly than would normally happen. A monomer ("mono" means one "mer" means unit) represents a single molecule forming the building block material of polymer molecule chains. Liquid: single monomer mainly made of ethyl methacrylate (EMA), which sometimes includes various monomers and additives as well. Ingredients: Ethyl Methacrylate, other Acrylic Monomers
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