Hydrophobic

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Related to Hydrophobe: hydrophile

Hydrophobic

Describing any substance that repels water. This is important in the petroleum industry.
References in periodicals archive ?
The type of hydrophobe, as well as the pH of the systems and the concentration of the surfactant was varied.
These appear to be between X-45 hydrophobes and hydrophobes in L-100 molecules that are not accessible at rest or under very low shear rates.
Varying size/structure of hydrophobe, similar HLB values - ethoxylates at 10.
By using an amine-containing hydrophobe and depressing the pH, a 20% solids solution of this thickener has a viscosity of only 2200 cP at pH 2.
In addition to the three monomers, the miniemulsion formulation for the liquid applied wound barrier dressing includes polyvinyl alcohol as a viscosity aid and wetting agent, alkylaryl poly-ether alcohol and nonlylphenoxpoly (ethyleneoxy) alcohol as surfactants and emulsifiers, t-butyl hydroperoxide as the initator, benzoate esters as hydrophobes and plasticizers, and very minor amounts of different reagents that act as pH adjusters, defoamers, and reducing agents.
In the copolymer case, some concentrations were slightly higher than the critical hydrophobe concentration of the CMCHM grafted with 6% hexadecylamine (HDA) ([C.
Elliott, PT, Xing, L-1, Wetzel, WH, Glass, JE, "Influence of Terminal Hydrophobe Branching on the Aqueous Solution Behavior of Model Hydrophobically-Modified Ethoxylated Urethane Associative Thickeners.
To achieve good dispersion the dispersant should be bifunctional, having ionic functionality to interact with the pigment and hydrophobic functionality to interact with the associative thickener hydrophobes.
The cause for reduction in WRE values with some toner formulations is not clear but may be due to some incompatibility between ingredients, especially between polymer emulsion and hydrophobe.
Because Gemini technology offers two hydrophiles and at least two hydrophobes within a single molecule, Gemini surfactants are more surface-active than their single hydrophile-single hydrophobe analogs," said Dr.
A larger PPO middle group would promote a stronger adsorption than two terminal positions, based total hydrophobe strength and on entropic considerations.
They consist of a range of a branched 20 or 12 carbon hydrophobe and varying degree of ethoxylation.