Energy savings plus mechanical reinforcement and rheology control

1K, Heat Cured Nitrile Rubber Sealant by Sartomer

Adhesives Formulation

Applicable Type

Sealants

Applicable Base Polymer

Butadiene-Acrylonitriles / Nitrile Rubbers (NBR)

Applicable Industrial Sectors

Automotive

Applicable Base Polymer Properties

Acrylonitrile butadiene or nitrile adhesives and sealants are the most versatile of the general purpose rubber types. Nitrile rubber elastomers are commonly used as solvent based adhesives and sealants to bond vinyl, other elastomers, and fabrics where good wear, oil and water resistance are important. Nitrile sealants are generally used where high temperature and oil / solvent resistance is a requirement.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Nitrile rubber (NBR 1312LV, Zeon)

xxx

Calcium carbonate

Zinc oxide

xxx

Stearic acid

xxx

Magnesium oxide (Maglite D, Hallstar)

xxx

Antioxidant (Resin D, Emerald Performance Materials)

xxx

t-Butyl perbenzoate

xxx

Crosslinking coagent (Sartomer 633, Sartomer)

Typical Properties

Properties

Cure schedule

xxxxxxxxxxxxxx

Initial Lap shear adhesion CRS to CRS (psi)

xxx

Lap shear adhesion CRS to CRS (Aged 2 weeks @ 130°C), psi

xxx

Lap shear adhesion glass to CRS, psi

xxxx

Lap shear adhesion glass to E-coat, psi

xxx

Processing

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Resulting Properties

A major application area for 1K, Heat Cured Nitrile Rubber Sealant formulation is the auto industry. Sartomer 633, is a metallic diacrylate coagent, which when added to peroxide-containing sealant formulations co-cures to provide the necessary properties for good sealant performance, especially adhesion. Heat age values (130°C/two weeks) increases over the RT tests. Failure mode is cohesive in all cases with the Sartomer 633 coagent. Glass as well as e-coat steel show bond strengths exceeding 460 psi. The source of this formulation is Sartomer.