Protein glues

Halogenated compounds tliiochloro hydrocarbons with 5 to 50 C atoms chlorinated hydrocarbons Liihrication-oil and grease distillation vegetable-protein glues... 

Protein glues are good for bonding rubber to steel, cork to plywood. Asphalt makes a good adhesive for roofing of homes. 

Soy protein treated with alkali or the enzyme, trypsin, is useful in adhesives.138 Plywood made with new modified soy protein glues performs just as well as that made with conventional phenol-formaldehyde resins.139... 

Water-Soluble Proteins. Historically, several water-soluble plant and animal proteins have been used as adhesives, both industrially and in conservation work. Currently, only the milk-based casein products are in significant industrial use. Casein glues have also been used in conservation work, but formulations designed for high water resistance could be difficult to reverse. Plant proteins, especially those from legumes such as soybeans and peanuts, have been used industrially, some until fairly recently. Presumably at least some forms of plant protein glues would be reversible enough to be of interest to conservators. 

The final addition of preservative shown in this formulation is essential in virtually all protein glues to provide mold resistance in high-humidity service. Without this protection, even heat-cured soybean adhesives will mold as the moisture content of the bonded wood approaches 20% [24]. Copper-8-quinolinolate, and copper naphthenate are among the few remaining preservatives permitted to be used in the United States at this time for wood products. Where the use of chlorinated phenols or orthophenyl phenol is still permitted, they are also very effective preservatives for protein glues at the addition level shown. In this case, the sodium hydroxide content of the glue formulation converts the water-insoluble chlorinated fungicides to their soluble sodium salts. 

Because protein glues develop bond strength primarily by water loss over time, roll pressing has proved unsuccessful as a clamping method for wood products. The short, intense period of pressure simply squeezes the still-fluid mix off the glue line without... 

Uses Mfg. of phenolic and thermosetting resins, furan polymers, urea-formaldehyde resins wetting agent foundry sand binders corrosion-resist, resins intermediate for esterification and etherification paints solvent, plasticizer for phenolic resins solvent for dyes and resins nonreactive epoxy resin diluent vise, reducer, cure promoter, and carrier in amine-cured epoxy resins gel retarder in casein/protein glues polymer sealants/cements synthetic flavoring agent in foods and pharmaceuticals cosmetics ingred. in food-pkg. adhesives... 

Ammonium alum Diacetyl Glutaral Glyoxal hardener, gelatin contraceptive creams Paraformaldehyde hardener, gelatin/protein glues Potassium alum anhydrous hardener, high-speed tool steel Tungsten... 

Cold water paint n. Paint in which the binder or vehicle portion is composed of soybean or other vegetable protein, glue, resin emulsion, or other similar material dispersed in water. 

In the Middle Ages, the first glue-boiling plants came into being and produced protein glues from animal raw materials (glutin from hides and bones, blood albumin, casein from milk) or starch paste from plants. 

Water is not only the carrier for latexes but is also the most important of the solvents. Starches and dextrins, protein glues, and polyvinyl alcohol are the more significant water-soluble organic adhesives. Sodium silicates, comprising the most important family of inorganic adhesives, are water soluble. 

The presence of an organic solvent, however, may present fire and health hazards. Water-activated These types of adhesives are generally based on polyvinyl alcohol, starch or protein glues. 

This class of adhesives mostly includes soluble silicates and zirconia. Silicate-based adhesives are typically modified by adding clays to reduce shrinkage, protein glues for water resistance. 

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