AEROSIL® R is a fumed silica aftertreated with HMDS based on AEROSIL® Applications and Properties. Physico-chemical Data. IL. L. LLL. LLLLLL. AEROSIL® R is a fumed silica aftertreated with organosilane (HMDS) with high specific surface and marked hydrophobia. — The Cary Company, Since. AEROSIL® R S fumed silica after treated with HMDS based on AEROSIL® It is used in paints and coatings, adhesives and sealants, and silicone.

Author: Mirg Moogushicage
Country: Sierra Leone
Language: English (Spanish)
Genre: Marketing
Published (Last): 17 November 2008
Pages: 285
PDF File Size: 2.69 Mb
ePub File Size: 11.13 Mb
ISBN: 511-5-73304-839-7
Downloads: 28001
Price: Free* [*Free Regsitration Required]
Uploader: Durg

The Evonik Coating Additives Business Line from Evonik offers its customers with optimal solutions in the paints, coatings and printing ink sectors and supports them with the production of resource-efficient coatings.

Transparency of the films correlated well with size of microclusters in the dispersions from which they were prepared with larger microclusters leading to less transparent films. Curable composition, composition for coating, coating material, antifouling coating material, cured product thereof and antifouling method of base material.

Request for preliminary examination filed after expiration of 19th month from priority date pct application filed from This example demonstrates superhydrophobic films made from dispersions wherein the solvent comprises water.

In a third aspect, the present invention is directed to a method for making a superhydrophobic coating with the composition described in the first aspect of this invention, the method comprising the steps of applying the composition to a surface and allowing the composition to dry. A composition capable of yielding a superhydrophobic coating, the composition comprising. A process for making the composition of as claimed in any one of the preceding claims, comprising the step of combining, in no particular order, the silica-based particles, at least a first part of the solvent and the silicone to provide a mixture.


Aerosil R S

In this way good mixing of the components is achieved owing to the miscibility of the silicone and polar organic solvent. Additionally or alternatively the coating may display a sliding angle for water of less than 15 degrees or even from 0.

Such an angle maybe measured with arrosil goniometer or other water droplet shape analysis systems. The compositions studied and the resulting properties contact angle and sliding angle aerosi, films made by drying the compositions are given in Table 5. However, these films remained superhydrophobic and SEM images showed the fumed silica particles assembled into a hierarchical structure, albeit a more dense structure than was observed for sample 5.

AEROSIL® R 812 S Hydrophobic Fumed Silica

Are you a distributor who is interested in being listed here? The resulting mixture was vigorously stirred in order to produce the final varnish.

Most preferably, the surface is, or comprises, glass. Even other efforts have been disclosed for making superhydrophobic surfaces.

The composition as claimed in any one of the preceding claims wherein the solvent comprises a polar organic solvent, preferably a Ci-C 4 alcohol.

These r12 and the contact angle CA and sliding angle SA of the films remaining after drying the compositions on a surface are shown in Table 1. The present inventors have found that silicone can increase the durability of coatings made from compositions comprising microcluster of silica-based particles even when used in relatively small amounts.

AEROSIL® R Hydrophobic Fumed Silica

Preventive against formation of frost column and prevention of formation of frost column. Highly-wear-resistant super-hydrophobic composite coating and preparation method thereof.


This example demonstrates the effect of composition on the contact angle and sliding angle of films. This website provides links to other websites owned by third parties. The results are shown in Table 2.

Item #: Aerosil R812 Aerosil R812 Fumed Silica Powder

All other materials were analytical grade unless otherwise stated. Viscosity of fluids such as silicone oils can be determined, for example, by the relevant international standard, such as ISO A further advantage of silicones employed in the present invention is that they typically have a refractive index which is aeroxil to that of silica-based particles.

Efforts for cleaning surfaces with limited amounts of water have been made. For the avoidance of doubt, the word “comprising” is intended to mean “including” but not necessarily “consisting of or “composed of.

Microclusters “Microcluster” as used herein, is meant to mean a bundle of particles, and preferably, a bundle of particles that form an aggregate r82 the same or varying sizes aerosiil. This varnish was made in a manner similar to Varnish 7A except that twenty five 25 grams of silica Aerosil R, particle size 7 nm was used with twenty-five 25 grams of titanium dioxide particle size nm.

Thus in one embodiment the solvent comprises polar organic solvent.

The microcluster may be formed from heterogeneously sized particles or homogeneously sized particles. Such structures can be used for coatings that possess superhydrophobic properties.