Contact adhesives nitrile rubber

The surface modification of the ground rubber tire (GRT) powder was found to be suitable for enhancement of its adhesion to nitrile rubber (NBR) vulcanizates (Zhang et al., 2009c). By use of the atmospheric pressure dielectric barrier discharge, the hydrophobic surface of the powder transformed to a hydrophilic one as shown by the water contact angle, ATR-FTIR, and X-ray photoelectron spectroscopic (XPS) studies. After atmospheric plasma treatment, the improvement in the tensile strength and tear strength was observed for the modified tire powder-filled NBR vulcanizates. The latter was attributed to the enhanced interfacial interaction between modified GRT and NBR matrix. 

Uses Acrylic resin comonomer for paints, adhesives, textiles, leather, paper coatings nitrile rubber comonomer synthetic flavoring agent in foods and pharmaceuticals nonwoven binder modifier for oils/alkyds in food-contact coatings Features Fruity flavor... 

Hazardous Decomp. Prods. CO, CO2, acrid fumes NFPA Health 2, Flammability 3, Reactivity 2 Uses Monomer for synthesis of nitrile rubber, PVAc emulsions, PVOH, EVA copolymers, vinyl chloride-vinyl acetate copolymers, PVBI, and vinyl acetate-acrylonitrile copolymers in polymerized form for plastic masses, films, lacquers, latex paints, adhesives, textile finishing, safety glass interlayers textile hand modifier binder for paper coatings esterification for food starch modified film-former in cosmetics food pkg. adhesives resinous/polymeric food-contact coatings for polyolefin films food-contact paper/paperboard, ionomeric resins, copolymers, laminates, resin-bonded filters, textiles... 

Adhesives. Contact adhesives are blends of rubber, phenolic resin, and additives supplied in solvent or aqueous dispersion form they are typically applied to both surfaces to be joined (98). Evaporation of the solvent leaves an adhesive film that forms a strong, peel-resistant bond. Contact adhesives are used widely in the furniture and construction industries and also in the automotive and footwear industries. The phenolic resins promote adhesion and act as tackifiers, usually at a concentration of 20-40%. In solvent-based contact adhesives, neoprene is preferred, whereas nitrile is used in specialty applications. The type and grade of phenolic resin selected control tack time, bond strength, and durability. 

When nitrile rubber vulcanisates and metals are kept in contact, under pressure, for long periods of time an adhesion force develops between their surfaces this force has become known as fixing . The strength of the bond between the two materials can be termed the fixing strength. 

Nitrile rubber is used preferably for contact adhesives with improved plasticizer resistance. Polyisobutylene is used in pressure-sensitive adhesives. Butyl rubber is sometimes added to pressure-sensitive and hot-melt adhesives, although it is mainly used in sealing compounds. Epoxy resins and reactive (meth)acrylate adhesives (reactive adhesives) are modified with polychloroprene, butyl, and nitrile rubber. Chlorinated rubber is added in small quantities to contact adhesives and also to rubber-to-metal bonding agents for improving the adhesion properties. 

Contact cements based on nitrile rubber and polyurethane are more resistant to oils and plasticizers than polychloroprene adhesives. To improve adhesion and to increase thermal stability, contact adhesives may be applied together with isocyanate hardeners. Today solvent-free contact adhesives based on aqueous polychloroprene latexes are also available. 

Contact adhesives (polychloroprene, nitrile, or polyurethane rubber) are used for fitting vinyl roofs, roof linings, sound-deadening mats (where they are not already incorporated in the primer-coated body), and carpets. More recent prefabricated roof constructions are designed for bonding with special emulsions. 

Bonding PVC to Steel, Aluminum Foil, Copper, and Polyurethane. Nitrile rubber/ phenolic adhesives have been utilized to bond PVC to a variety of substrates, including steel, " aluminum foil, and copper. Contact adhesives have been reported for plasticized PVC. A heat-resistant adhesive has... 

Uses Process/polymerization aid in prod, of syn. nitrile rubbers air entrainment agent/mortar plasticizer for prod, of concrete in adhesives for food pkg. defoamer in food-contact paper/paperboard Regulatory FDA 21CFR 175.105 and BGA14 and 21 for indirect food contact Properties Amber cl. liq. acid no. < 1 pH 11 1 (20 C) 50 1% solids Burez K80-500 [Eka Chems.)... 

Ctiem. Descrip. Silicone-based, clay-supported emulsion Uses Dewebber, antifoam for natural latex and syn. blends, esp. nitrile formulations and high vise, latexes in latex dipping industry (mfg. of medical, household, and industrial gloves, toys, balloons) defoamerfor pulp/paper mfg., influent and effluent wastewater treatment, boiler water treatment, paints, adhesives, and sealants food-contact rubber articles... 

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