Iso-stearoyl Titanate (Coupling Agents)

Super ISTT – Isostearoyl Titanate

Coupling Agents are molecular bridges at the interface between two dissimilar substrates, such as inorganic / organic filler, fiber or pigment and an organic polymer matrix. Titanium derived coupling agents react with free protons at the inorganic or organic surface. Typically, titanate-treated organics are hydrophobic, organophilic and organofunctional and therefore, exhibit enhanced dispersibility, bonding and chemical interaction with the polymer or organic surface. Typically, titanate-treated inorganics are hydrophobic organophilic and organofunctional and therefore, exhibit enhanced dispersibility, bonding and chemical interaction with the polymer or organic phase 

(1). When used in filled polymers, they improve impact strength, exhibit melt viscosity lower than that of virgin polymer, at inorganic loadings above 50% and enhance maintenance of mechanical properties during aging. 

(2). When the pigment particulate is monolayered with coupling agent, water and air contained within the pigment are removed and replaced by polymer, thereby making the composite moisture and void free. Therefore it eliminates the source or site of various mechanical property depleting mechanisms, such as aging, corrosion, loss of electrical properties, etc. in pigmented, filled and reinforced polymer composites and elastomers.

Titanane surface modifiers contain hydrolysable- OR groups (where R is an alkyl radical such as iso propyi) which can condense with reactive groups on the filter surface, and between 2 and 4 hydrophobic substituents which react with the polymer matrix.

Titanates are thought to chemically bond to surface hydroxyl groups of fillers, the hydrophobic substituents on the titanate modifying the properties of the filler surface.

A simple reaction mechanism is illustrated below :

ISTT has been developed by Royce International as a surface modifier for inorganic fillers.

View /Download Technical Data Sheet and Product Literature (PDF Format)

APPLICATIONS / MARKETS : Polymers & Plastics – Compounds for Wire and Cable, Highly Calcium Carbonate / Mica Filled Compounds Rubber – Ruber Compounds, Tire Additives

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