Leather adhesive

Cross-linkable rubbery polyesters have been produced but are now no longer produced. Rubbery polyester-amides were introduced by ICI under the trade name Vulcaprene as a leathercloth material but later were used primarily as leather adhesives and as flexible coatings for rubber goods. A typical polymer may be made by condensing ethylene glycol, adipic acid and ethanolamine to a wax with a molecular weight of about 5000. 

Most of the chemicals in Table 11.2 target the respiratory system and CNS. Exposures in arts and crafts use are almost always to mixtures of lipophilic and hydrophilic chemicals. When used in areas with poor air circulation (as is often the case in home use) the result can be unexpected acute toxicity. For example, it has been reported that exposure to formaldehyde and terpene hydrocarbons at very low levels unexpectedly produced dyspnea and other lower-lung symptoms in wood workers. The effects could not be attributed to either the formaldehyde or the terpenes alone at low levels of exposure In another example, it was reported that chronic exposure to a combination of very low concentrations of MEK, ethyl acetate, and aliphatic hydrocarbons in a leather adhesive formulation induced unanticipated CNS effects. Some products that are considered by most... 

Table 1 Formulation of Leather Adhesive with Methyl Cellulose...

Uses Microbicide for solv.- or water-based coatings, caulks, sealants, leather, adhesives, wood protective coating and impregnation systems Features Broad-spectrum effective against bacteria and fungi Regulatory ERA registered... 

Main fields of application cable wire, sheet, film, interior automotive, medical tubing, blood bags, gaskets, profiles, anti-fogging coatings, upholstery, artificial leather, adhesives, tapes ... 

A number of modern industrial processes are based on the catalytic carbonyl at 1 on of organic substrates by carbon monoxide. ll In contrast, the application of carbon monoxide as reductant in organic synthesis is confined to relatively few exampl es. 2l In recent years the catalytic carbonyl at I on of nitro compounds has become a ery intense field of research. This is due to the fact that 3 series of industrially important compounds can be obtained - om nitro compounds and carbon monoxide in a single step azo compounds, amides, amines, oximes, ureas, urethanes and isocyanates [ 3] and indoles. Ureas and urethanes are important final products and intermediates in the synthesis of ert ll eps and pesticides. On the other hand mono and di-1 socyanates are very important intermed 1 a es in the manu-i-acture of pesticides, polyurethane foam plastics, synthetic leather, adhesives and coatings. 

Butylphenol-formaldhydharze. Dermatosen 27 49-52 Shono M, Ezoe K, Kaniwa M-A, Ikarashi Y, Kojima S, Nakamura A (1991) Allergic contact dermatitis from para-tertiary-butylphenol-formaldehyde resin (PTBP-FR) in athletic tape and leather adhesive. Contact Dermatitis 24 281-288 Snell FD, Ettre LS (1973) Encyclopedia of industrial chemical analysis, vol 17. Interscience Publishers, USA, pp 9-10... 

Occupations involved with manufacturing furniture, cabinets and fixtures can involve handling materials made of wood, laminates, metal, synthetics, plastics resins, reeds, rattan, upholstery fabric, leather, adhesives, and finishing products. For simplicity, the general categories of fabrication, assembly, repair, finishing, and upholstery are discussed. Table i gives examples of some of the job titles used in furniture manufacture. 

Polyurethanes based on polyesteramides were originally developed as elastomers but now find use primarily as leather adhesives and flexible coatings for rubber goods. 

Evostik Leather Adhesive A special purpose formulation. 

Polyurethane is widely used in various fields, such as the manufacture of plastic foams, cushions, rubber goods, synthetic leathers, adhesives, paints, and fibers. Conventional polyurethane is produced using toxic diisocyanate, which is derived from the even more toxic phosgene, and it is generally resistant to biodegradation (Tokiwa, 2003b Howard, 2002). This may be ascribed both to the complexity of the molecular structures and lack of enzymatically cleavable linkages in the polymer chain. 

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