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The material selection platform
Adhesives Ingredients
The material selection platform
Adhesives Ingredients

Cold Seal Natural Rubber Latex Adhesive

Adhesives Formulation

Applicable Base Polymer
Applicable Industrial Sectors

Applicable Base Polymer Properties

Natural rubber is generally available as a light brown, slightly viscous solvent solution or as a latex. It has poor elevated temperature resistance without vulcanization. It has good resistance to water and to mold, but poor resistance to oil, solvents, and low temperatures. It is often used in medical applications because of its low toxicity, but recent history has shown that certain individuals may be allergic to natural rubber latex.

Typical Formulation Ingredients

Ingredient
Parts by weight
Natural rubber latex, 60% 
xxx 
10% potassium hydroxide solution 
xxx 
Aqueous dispersion (50%) of zinc diethyl dithiocarbamate 
xxx 

Processing

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Resulting Properties

The above table is for a cold seal natural rubber adhesive. This formulation has been successfully employed in self-sealing envelopes where the adhesive is coated onto opposing surfaces. The surfaces will irreversibly adhere when pressed together.
Cold seal adhesives are a special class of pressure sensitive adhesives (PSAs) that possess the capabilities of forming a strong bond to themselves at room temperature when only slight pressure is applied. Yet, these adhesives exhibit no tack to other substrates

Tips and Tricks

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