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Search for product by molecular structureThe Unique Properties of SiliconesThe Difference between "Straight" and "Modified" Silicone Fluids

The Difference between "Straight" and "Modified" Silicone Fluids

Silicone fluids are classified into two types: straight silicone fluids and modified silicone fluids.

Straight silicone fluids

Dimethyl silicone fluid

Grade Features
DM-FLUID The most common of silicone fluid product for general-purpose applications. Available in viscosities from 0.65 mm2/s to 1,000,000 mm2/s. Also available as a spray.
KF-965 For high-temperature applications (-50°C to +250°C). Also available as a spray.
KF-968 For high-temperature applications (-50°C to +250°C). Suitable as a heating medium in open systems.
KF-995 Cyclic dimethyl silicone fluid. Volatile. No residue after evaporation, so cosmetics have a silky feel.

Methylphenyl silicone fluid

Grade Features
F-5W-0 For low-temperature applications (-60°C to +200°C).
KF-54 For high-temperature applications (-30°C to +250°C). Suitable as a heating medium in open systems.
HIVAC F-4/
HIVAC F-5
Good oxidative stability and chemical resistance. For oil diffusion pump applications. For high-level vacuums of 10-7 to 10-12 Torr. Higher vacuums can be achieved with HIVAC F-5.
KF-56 Alcohol-soluble. Used mainly as an additive in cosmetic products.

Methylhydrogen silicone fluid

Grade Features
F-9W-9 Highly water repellent. Suitable for processing glass, metal, fibers, and powders.

Modified silicone fluids

Common dimethyl silicone fluid is physiologically inert and has the characteristics of water repellency, defoaming properties, thermo-oxidative stability, and chemical stability. Modified silicone fluids are unique products that improve on the advantageous characteristics of dimethyl polysiloxane by introducing various organic groups into some of the methyl groups. Modification adds such properties as compatibility or reactivity with organic substances, water solubility, emulsifying properties, water repellency, paintability, anti-static properties, softening properties and lubricity.

Modified silicone fluids are used in wide-ranging applications, as ingredients in cosmetics, resin modifiers, textile treatment agents, additives for waxes, water repellents for construction applications, and release agents. They are also used in various industries to improve the function of existing polymeric materials and in the development of new materials.

Type

Reactive silicone fluids

Modified type Features Applications
Amino-modified Water repellency, reactivity, absorbability, lubricity, releasability, flexibility Textile treatment agents, resin modifiers, paint additives, polishes, waxes
Epoxy-modified Reactivity, absorbability, releasability, flexibility Textile treatment agents, resin modifiers, waxes, paint additives
Carboxyl-modified Reactivity, lubricity, releasability, flexibility Textile treatment agents, resin modifiers, polishes, dispersants
Carbinol-modified Reactivity, releasability, oxygen permeability Resin modifiers, paint additives
Methacryl-modified Reactivity, absorbability, oxygen permeability Resin modifiers, paint additives
Mercapto-modified Reactivity, absorbability Paint additives, resin modifiers, corrosion retardants
Phenol-modified Reactivity Resin modifiers
Co-modified Reactivity, compatibility Waxes, resin modifiers, textile treatment agents, paint additives

Non-reactive silicone fluids

Modified type Features Applications
Polyether-modified Water solubility, water dispersibility, emulsifying Ingredients in cosmetics, emulsifiers, foaming agents, plastic additives, anti-fogging agents, defoamers, textile treatment agents, water soluble lubricants
Methylstyryl-modified Releasability, compatibility, lubricity Paint additives, plastic additives, release agents
Alkyl-modified Paintability, releasability, compatibility, lubricity Paint additives, water repellents for construction applications, release agents
Special fluids modified with higher fatty acid ester High melt point, compatibility Resin modifiers, paint additives
Special modified fluids with hydrophilic properties Water dispersibility, water solubility, lubricity, anti-fogging properties Anti-fogging agents, textile treatment agents
Fluids containing higher fatty acids High melt point, water repellency Waxes, polishes
Fluorine-modified Lubricity, chemical resistance, oil and solvent resistance Lubricants, defoamers

Structure

As shown below, the structures of modified silicone fluids are categorized into four major types, according to the position of the organic groups.

Side-chain type

An organic group has been introduced into the polysiloxane side chain.

Single-end type

An organic group has been introduced into one end of the polysiloxane.

Dual-end type

An organic group has been introduced into both ends of the polysiloxane.

Side-chain dual-end type

An organic group has been introduced into the side chains and both ends of the polysiloxane.

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