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Adhesives
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Arkema's versatile range of Acrylic monomers provides options when it comes to the market. With each possessing different glass transition temperature (Tg). Acrylic monomers are able to produce sticky polymers that adhere on a large variety of substrates with tailored adhesive properties (tack, cohesion,etc.).
The main applications for Acrylic adhesives are pressure-sensitive adhesives (PSA). PSA's are commonly used in self-adhesives for labels and envelopes, adhesives tapes (used in industry, medicine), glues for packaging, textile, floor tiling, and automobiles…The textile and construction industries also include acrylic adhesives mainly produced by polymerisation in emulsion.
Norsocryl® BA and 2EHA are largely used as soft monomers and Norsocryl® MA as hard monomers. Both area used to produce aqueous dispersions for adhesives.
Solvent resin adhesives represent the second acrylic adhesives technology and are mainly used in PSA. Benefits from Acrylics include excellent resistance to ageing, and yellowing.
Still other monomers are used in minor quantities to promote specific properties. Norsocryl® 102 and 104 can be used to promote shear stress and shear adhesion failure temperature properties of a PSA at levels below, where Acrylic acid (AA) is also used as a functional monomer for its polarity and reticulation properties.
Norsocryl® THFMA is especially very suitable as MMA substitute for low odor and low flammability structural adhesives formulations for metal, plastic, glass, etc... substrate bonding.
The last acrylic adhesives technology revolves around polymer resins for hot-melts (thermofusing glues) and polymers dissolved in monomers destined for the making of two-part glues and for polymerisation under radiation. Norsocryl® IOA can be used in UV PSA formulation as a soft apolar monofunctional monomer. This specialty monomer promote adhesion on plastic substrates.
Homopolymers of aliphatic monomers with a hydrocarbon length over C12 (Norsocryl® SMA) displays a specific behavior with melting temperature. This is due to crystallisation, and use of these monomers also leads to a decrease of surface energy. With respect to these properties, aliphatic monomers can be used to promote anti-tack properties.
