Solvent Borne Vulcanizable Natural Rubber Adhesive A

Typical Formulation Ingredients

Ingredient

Parts by weight

Natural rubber

xxxx

Zinc oxide

xxx

Antioxidant

xxx

Sulfur

xxx

Solvent

xxxx

(Source: De, S.K., “Natural Rubber Based Adhesives”, in Handbook of Adhesive Technology, 3rd ed., A. Pizzi and K. Mittal, eds., Marcel Dekker, New York, 2003)

Typical Properties

Properties

Dithiocarbanate accelerator (10% solution)

xxx

Processing

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Resulting Properties

The strength of natural rubber is low relative to other adhesives, and it tends to oxidize and become brittle on aging. Aging properties are fair, although sunlight exposure properties are not too good. Elevated temperatures can cause the polymer to soften unless the adhesive is vulcanized. Natural rubber has good resistance to water and to mold growth but poor resistance to oils, solvents, and oxidizing agents. The adhesive crystallizes at about –34°C and, therefore, is not suitable for low temperature applications.

Tips and Tricks

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