Application of easily dispersible fumed silica in industrial coatings

Release Time:

2021-09-15

Easily dispersible fumed silica

As a common rheology additive, fumed silica is widely used in solvent-based coatings and water-based coatings. Traditional fumed silica inevitably requires a grinding process during use to achieve the fineness required by the coating. Energy consumption and time during the grinding process are also costs.

In this regard, Evonik has launched four new AEROSIL fumed silicas that are easier to disperse, including AEROSIL E 972, AEROSIL E 805, AEROSIL E 812 and AEROSIL E 9200, which can help formulators save time and waste when developing coatings or paint formulations. Time-consuming and expensive grinding steps (e.g. using a bead mill).

Like other standard AEROSIL products, these four new easily dispersible (E2D) products can be used in paint and varnish formulations to provide controlled rheology and scratch resistance. Among them, E 972 is a more general product, and E 805 is suitable for Two-component polyurethane and epoxy systems, E 812 performs better in two-component polyurethane systems, and E 9200 is mainly used to improve the scratch resistance of the coating.

FEATURES

Characteristics of easily dispersible fumed silica

Same compatibility as conventional fumed silica

Same rheological properties as traditional fumed silica

Reduce production process/grinding process complexity

It only needs high-speed dispersion to add and use (no bead milling or high-shear grinding required)

Can be added later to adjust rheological properties

INTRODUCTION Easy to disperse product introduction

AEROSIL E 972

Broad range of rheology control agents (anti-settling, anti-sag)
Suitable for all coating systems
Varnish+Pigment
easiest to disperse
Can be used for water-based coatings
Excellent optical properties (gloss, haze)
Treatment with dimethyldichlorosilane
(DDS) fumed silica
General industry, coil steel, powder, automotive paint, woodware, plastic paint

AEROSIL E 812

Automotive high-gloss acrylic varnish
Excellent transparency
Best performance among anti-corrosion primers
Excellent rheological properties - especially epoxy two-component systems
Very high efficiency
Fumed silica treated with octyltrimethoxysilane (OCTMO)
High compatibility
Mainly used in solvent-based systems
Automotive paint, marine & anti-corrosion general industry

AEROSIL E 805

Automotive high-gloss acrylic varnish
Excellent transparency
Best performance among anti-corrosion primers
Excellent rheological properties - especially epoxy two-component systems
Very high efficiency
Fumed silica treated with octyltrimethoxysilane (OCTMO)
High compatibility
Mainly used in solvent-based systems
Automotive paint, marine & anti-corrosion general industry

AEROSIL E 9200

Improved wear and scratch resistance
No typical rheological properties
Solvent based varnish
High addition amounts are possible
Low thickening
Mainly used in solvent-based systems
Easier to add than AEROSIL R 9200
Automotive paint, general industrial paint, plastic paint, powder coating, wood paint