Polyacrylate elastomers plasticizers

The effects of phase inversion may also be noted with this system. Figure 7.3 illustrates the elongation of these materials. If the morphological analysis of Figure 6.7 is correct, the drop off in elongations at about 80% polyacrylate may be due to the loss of phase continuity of the elastomer. This explanation is not completely satisfying, however, because polyacrylate, the plastic portion, is continuous over most of the composition range. Alternately, the low Tg of poly aery late may have an... 

Uses Prod, of solv.-resistant elastomers, polyacrylate rubbers UV-cur-able reactive diluent soft contact lenses PVC impact modifier fabric coatings barrier coatings for polyethylene textile coalings plasticizer softener... 

NR and plastic blends have been reported for the preparation of thermoplastic NR blended systems. Many types of plastics have been blended with NR, such as polyethylene, polypropylene, polystyrene, " polyacrylates or polyacrylic acid, and poly(methyl methacrylate). These thermoplastic NRs provide new materials with different properties that range from a soft elastomer to a semi-rigid NR plastic for various industrial applications.In addition, NR can improve the toughness of brittle thermoplastic materials. The NR and thermoplastic blends express greater ductility and impact strength at low temperatures. The requirements for certain mechanical and physical specifications can be achieved by optimizing the blended compositions and selecting the most suitable thermoplastics. 

As the substrate sheet, a thin plastic film or tightly packed nonwoven cloth, such as polyester spanbond nonwoven cloth of approximately 0.15 mm, is used. A synthetic rubber, such as styrene-butadiene rubber or thermoplastic polyurethane elastomer, is used as a binder. In addition, a surfactant for hydrophilicity, an antioxidant for prevention of thermodeformation, and a silica-type inorganic filler for prevention of tackiness are used. For the superabsorbent polymer particles, various synthetic polymers, for example, polyacrylate and polyvinyl-type superabsorbent polymers, can be used. For this apphcation, the particle sizes are an important parameter, because they polymer is required to be within the coating layer, and as the absorption rate is no retarded, quickly protrude from the layer when swelling. 

A patent d issued in 1952 described the use of copolymers of higher acrylate or methacrylate esters with acrylic acid or methacrylic acid in the preparation of improved pressure sensitive tapes and liners for adherent rubber surfaces. The carboxyl content of these copolymers was so high that they could be considered to be plasticized polyacrylic acids rather than carboxylic elastomers. 

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