Shoe-soling adhesives

Water-borne adhesives are preferred because of restrictions on the use of solvents. Low viscosity prepolymers are emulsified in water, followed by chain extension with water-soluble glycols or diamines. As cross-linker PMDI can be used, which has a shelf life of 5 to 6 h in water. Water-borne polyurethane coatings are used for vacuum forming of PVC sheeting to ABS shells in automotive interior door panels, for the lamination of ABS/PVC film to treated polypropylene foam for use in automotive instmment panels, as metal primers for steering wheels, in flexible packaging lamination, as shoe sole adhesive, and as tie coats for polyurethane-coated fabrics. PMDI is also used as a binder for reconstituted wood products and as a foundry core binder. 

The full-prepolymer, quasi-prepolymer, and one-shot techniques may appear to be quite similar, but they each have important bearing on equipment requirements and physical properties. The full-prepolymer method, for example, is die process of choice for making high-performance cast elastomers with superb dynamic properties, such as industrial bumpers and bushings. Quasi-prepolymers are used in less demanding applications like shoe soles, adhesives, and spray elastomers. One-shots make up the rest, including most foams and elastomers. 

Shoe soles, adhesives, plastics modification, bitumen modification, miscellaneous moulded items, e.g., swim fins, black window glazing gaskets (UK -30 °C to +55 °C). 

These types of TPE, known as styrenics, e.g.. Shell s kraton, have a useful temperature range of -70°C to 100°C. They are viscous melts above 130°C and can be molded and extruded into various articles. Typical applications include shoe soles, adhesives, and a number of molded products. 

VII. Canvas Shoe Sole Adhesive 60% NR latex (LA-TZ type)... 

Shoe adhesives. CR adhesives are used for the permanent attachment of shoe soles. For difficult-to-bond sole materials (plasticized PVC, EVA foaming soles, thermoplastic rubber, SBR) graft polymer solutions of Neoprene AD-G combined with a polyisocyanate provide a good adhesion. Another major area for CR contact adhesives is the manufacture of leather goods, particularly leather shoe sole bonding and belt lamination. 

Important markets for TPE s include shoe soles, pressure sensitive adhesives, insulation, and recyclable bumpers. 

An isomeric derivative of natural rubber produced by a variety of chemical treatments. The products are resinous and find application as reinforcing agents in natural rubber compounds (particularly in shoe soles) and as rubber-to-metal adhesives. 

This scries of robbers includes monomer ratios up to about 50% styrene. The addition of more than 50% styrene makes the materials more like plastic than robber. The most commonly used SBR rubbers contain about 25% styrene, which is polymerized in emulsion systems at 5-l0°C. Most SBR goes into tires, but the type for the tread differs from that of the sidewall or carcass. SBRs for adhesives, shoe soles, and other products also differ. The formulation permits vast varieties of end products. Among the processing variables that can be manipulated tu provide different end characteristics are temperature, viscusily. use of different emulsifiers and solvents, use of different antioxidants for stabilization, different oils, carbon blacks, and coagulation techniques. 

D 2558 Test Method for Evaluation Peel Strength of Shoe Sole Attaching Adhesives... 

They are the leading class of thermoplastic elastomers, 45 percent of the total market, used mainly in adhesives, shoe soles, wire and cable insulation, kitchen utensils, medical products, and auto parts. 

Butadiene is used as a chemical intermediate and as a polymer component in the synthetic rubber industry, the latter accounting for 75% of the butadiene produced. Styrene-butadiene rubber, polybutadiene rubber, adiponitrile, styrene-butadiene latex, acrylonitrile-butadiene-styrene resins, and nitrile rubber are used in the manufacture of tires, nylon products, plastic bottles and food wraps, molded rubber goods, latex adhesives, carpet backing and pads, shoe soles, and medical devices. 

Use Oil-resistant seals, shoe soles, gasoline hose, belt conveyors, plasticizers, paper saturation, adhesives, leather finishes, and carpet backing. 

The best-known applications of adhesives containing solvents include bonding of PVC tube sections, shoe soles, rubber components, sheathing and paneling with PVC-U foils and PVC-P foils, bonding of artificial leather, EPDM profiles on painted surfaces or adhesive bonding of large foam surfaces. 

The footwear industry uses polyurethane as microcellular elastomer for shoe soles thermoplastic elastomers for ski boots, coatings for shoe uppers, and adhesives. The microcellular elastomer shoe soles have been used for over 10 years. The polyurethane shoe sole offers lightweight and flexibility in styling. Fine detail simulating wood, cork, leather, and handstitching can be readily reproduced. New style sport shoes have been developed to incorporate multi-colors and multi-density soles. As a result, these shoe soles are used in women s high-fashion shoes, work shoes, and a variety of leisure and sport shoes. The current demand for polyurethane shoe soles is for continued steady growth and demand. There has been a continued shift of the shoe sole market to the Middle East and Eastern European areas. 

Based on the numbers in Figures 1 and 2, by 1985 RIM and RRIM will require approximately 50 M lbs. of monomeric MDI, which is about one-third of the monomeric MDI supply in 1985 (Table IX based on 20-25% of 85% nameplate capacity, excluding ARCO capacity, = 137-171 M lbs. monomeric MDI). This will leave about 100 M lbs. of monomeric MDI for cast elastomers, thermoplastic polyurethanes, shoe soles, semi-rigid foams, and some adhesives and sealants, a monomeric MDI supply which should be more than sufficient for these applications. As RRIM grows, a need for capacity expansion can be seen in the late 1980 s. No effects on the market will be seen from PUR-SMC until after 1985, and at the present time meaningful projections are impossible. 

Polyester polyols are used widely in urethane adhesives because of their excellent adhesive and cohesive properties. Compared to polyether-based polyols, polyester-based polyol adhesives have higher tensile strengths and improved heat resistance. These benefits come at the sacrifice of hydrolytic resistance, low-temperature performance, and chemical resistance. One of the more important application areas for these products is in the solvent-borne thermoplastic adhesives used in shoe sole binding. These products are typically made from adipic acid and various glycols (see Fig. 15). 

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