Adhesion promoters coupling agents

It should be noted that side effects are possible when using adhesion promoters/coupling agents as additives in adhesives and coatings, usually beneficial but not invariably so. 

Hostaperm, High-performance organic pigments, Oariant Corp., BU Additives Hostaprime, Adhesion promoters coupling agents, Oariant Corp., BU Additives Hostasol, Fluorescent dyes, Oariant Corp., BU Additives... 

The effect of matrix types on the flexural properties of PVC/wood-flour composites is summarized in Table 2. The flexural strength and modulus of the composites were compared with a variation of nano clay contents in the matrix as well as the use of adhesion promoter (coupling agent). 

The adhesion promotion of an organic matrix to an inorganic substrate using a silane has been studied to model the structure of the created interphase [64-66]. The polymer/silane interphase is influenced by the solubility parameter of both the silane coupling agent and the polymer. More interdiffusion occurs when the solubility parameters of the polymer and the silane closely match together. It is believed that this model can be applied to silicone adhesive/solid substrate system. 

Various additives and fillers may be employed. Calcium carbonate, talc, carbon black, titanium dioxide, and wollastonite are commonly used as fillers. Plasticizers are often utilized also. Plasticizers may reduce viscosity and may help adhesion to certain substrates. Thixotropes such as fumed silica, structured clays, precipitated silica, PVC powder, etc. can be added. Adhesion promoters, such as silane coupling agents, may also be used in the formulation [69]. 

Injecting epoxy, furan, or furan-formaldehyde resins into poorly consolidated formations to consolidate them was a common sand control practice for thin highly productive formations (44-46). Organic solvents (46) and silane coupling agents (47) are used to promote adhesion of the resin to the rock surface. Excess resin is flushed deeper into the formation to minimize resin hardening in the flow channels since this would reduce formation permeability. 

In some examples it is not necessary to prepare the organometallic-coupling agent R2MX2 beforehand. Thus coating glass fibres with a heptane or alcohol solution of titanium alkoxide promotes adhesion between the fibre and polymer, e.g., acrylic, polyolefins, polyester, polyamide and other thermoplastic resins. 

Zirconium based coupling agents and adhesion promoters... 

Silane coupling agents are very effective adhesion promoters between glass and certain thermoplastic polymers where no chemical reaction between coupling agent and polymer is observed. 

Thus, a sufficiently thin layer or film of silane is an essential requirement for successful use as an adhesion promoter or coupling agent. 

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