Neoprene-based adhesives

Choice of adhesive. Use neoprene adhesive for applications where vibration, bumps, etc., are encountered such as over-the-road trailers. For higher temperatures epoxy is preferred. Neoprene-based adhesive should be allowed to dry to touch before the sheets are applied over it. Neoprene adhesive is used for application temperature not exceeding 107°C while epoxy adhesive is used for up to 121°C. It is important to note that adhesive can become a weak link in an otherwise strong chain. 

Footwear is a sizable niche for polyurethane adhesives that are used to attach the soles. Polyurethane adhesives compete primarily with neoprene-based adhesives and have replaced much of the neoprene volume due to improved performance. However, the overall market has declined as U.S. manufacturers have moved production overseas. 

Neoprene-based adhesive is also found to be effective in bonding vulcanised pieces and a typical formulation is given in Table 5.3. It is used as a 15 - 20% solution in toluene. 

Table 5.3 Neoprene-based adhesive solution for bonding thin vulcanised rubber pieces ...

An additional point on specific adhesion is that acrylic based contact adhesive systems showed markedly better bond strength retention to plasticized vinyl substrates than do neoprene based adhesives. This results from the inherently better plasticizer migration resistance of acrylic resins. 

Floor coverings - Wooden floors are glued to plywood subflooring using SBR, natural rubber and neoprene based adhesives. PVC plastie floor tiles use acrylate and nonvulcanized natural rubber adhesives. 

Waterborne contact adhesives contain an elastomer in latex form, usually an acryflc or neoprene-based latex, and a heat-reactive, cross-linkable phenohc resin in the form of an aqueous dispersion. The phenoHc resin improves metal adhesion, green strength, and peel strength at elevated temperature. A typical formulation contains three parts latex and one part phenohc dispersion (dry weight bases). Although metal oxides may be added, reaction of the oxide with the phenohc resin does not occur readily. 

D. G. Coe, Neoprene Eatex Based Adhesives, du Pont de Nemours Int. SA Geneva, 1991. 

The elastomers considered in this section have been selected considering the most commonly used in rubber base adhesives natural rubber butyl nibber and polyisobutylenes styrene-butadiene rubber nitrile rubber polychloroprene rubber (neoprene). Typical properties of these rubbers are shown in Table 2. 

Coe, D.G., Neoprene solvent based adhesives. Technical Bulletin ADH-100.1 (Rl), E.l. Du Pont de Nemours. 

Non-structural adhesives used on CELCXDN arc usually one-component, room-temperature-curing systems based either on thermoplastic resins or elastomeric materials dispersed in solvents. They are normally used in applications which will not be exposed to temperatures over 180°F. Neoprene rubber adhesives are examples. (7). 

Synthetic rubber, a dimethylbutadiene, was developed as a substitute for natural rubber in Germany during World War I and saw limited use as an adhesive. In the early 1930s, neoprene rubber (then called Duprene) became available to adhesive manufacturers in the United States, and shortly thereafter in Great Britain. Today, neoprene rubber adhesives are available as both thermoplastic and cross-linking systems in both solvent and emulsion formulations. Neoprene rubber is the major base resin for contact adhesives. A limited amount of neoprene rubber is also used in sealants. 

Uses Tackifier resin for water-based adhesives and sealants based on acrylic, S/B, nat. rubber, neoprene, and PVAc, esp. for pressure-sensitive adhesives, and for coatings Features Solv.-free... 

Adhesives used to bond acetal homopolymer to itself and to other materials, such as aluminum, steel, natural rubber, neoprene rubber, and Buna rubber, include polyester with isocyanate curing agent, rubber-based adhesives, phenolics, epoxies, modified epoxies, and vinyls. Solvent cementing... 

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