Page 117 - Handbook of Adhesion Promoters

110 Properties of Adhesion Promoters

7.10 INORGANIC COMPOUNDS

GENERAL INFORMATION
Name: Marcoba CB, Actimax CAS #: 1957-11-4, 10139-54- EC #: 200-313-4
MgO 5, 72432-84-9, 1309-48-4
Common synonym: cobalt stearate, cobalt neodecanoate, cobalt carboxy-boroacetate
Composition: 75 magnesium oxide, 25% polymer binder (EPDM/EVM) and dispersing agent
Empirical formula: C18H36CoO2, C10H19CoO2, C20H38CoO4, MgO2
Active matter, wt%: 75 Molecular mass: 230-284
PHYSICAL PROPERTIES
Color: purple to blue; white to gray State: solid
o
3
Density, at 20 C, kg/m : 1900
USE
Manufacturer: Wholemark Fine Chemical; Ningbo Actmix Rubber Chemicals Co., Ltd.
Recommended for resins: rubber, polychloroprene rubber, CSM, CM, CIIR and FPM rubber
compounds.
Recommended applications: adhesion promoters
Typical dose: 3-5 phr

A poor adhesion of poly(3,4-ethylenedioxythiophene) to metallic substrates was
improved by use of iridium oxide which demonstrated exceptional stability for PEDOT
coatings, resulting in polymer survival over 10,000 redox cycles and 110 days under
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accelerated aging conditions at 60°C. Also, nanostructured Pt was used to improve
mechanical adhesion which resulted in 10-fold adhesion improvement compared to
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smooth Pt substrates by simply altering the morphology of Pt (Figure 7.2).
An ultrathin conductive adhesion promoter having positively charged reduced gra-
phene oxide has been used for highly stable silver nanowire transparent conductive elec-
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trodes. The adhesive films are extremely stable under harsh conditions, including
ultrasonication in a variety of solvents, 3M Scotch tape detachment test, mechanical bend-
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ing up to 0.3% strain, and fatigue over 1000 cycles. The high adhesion force is attributed
to the ionic interactions between the positively charged protonated amine groups in gra-
phene oxide and the negatively charged hydroxo- and oxo-groups on the silver nano-
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wire.
In still another development, graphene oxide was functionalized and reduced by
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polydopamine. Its film adhered to silver nanowire acting as adhesion promoter and a
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protective layer.