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.
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Highly durable superhydrophobic, oleophobic and anti-icing coatings and methods and compositions for their preparation.
This example demonstrates the effect of composition on the contact angle and sliding angle of films. The microcluster may be formed from heterogeneously sized particles or homogeneously sized particles. Such silicas are described, for aerosl, in United States Patent No.
The microcluster has a diameter of at least 1 aerossil and preferably at least 10 nm, more preferably at least 50 nm, more preferably still at least nm and most preferably at least nm. Articles with surfaces that are difficult to wet, i. 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.
The results are shown in Table 4. Most preferably the solvent comprises methanol, ethanol, propanol, isopropanol or a mixture thereof. Super-hydrophobic coating material, preparation method thereof and super-hydrophobic adrosil.
The composition comprises solvent,silicone and microcluster of silica-based particles.
AEROSIL® R 812 Hydrophobic Fumed Silica
The composition preferably comprises the silica-based particles in an amount from 0. It is clear from these results that higher viscosity silicones provide more resistance to peeling and scratching of the film. This example demonstrates the effect of the type of surface modification of fumed silica particles on film aersil. The content of such third party sites is not within our control, and we cannot and will not take responsibility for the information or content.
Hydrophobic fumed silica – AEROSIL® fumed silica
In fact, the cleaning of surfaces that attempt to mimic the surface of a lotus leaf has been investigated. All other aspects of the present invention will more readily become apparent upon considering the detailed description and examples which follow. Particularly preferred solvents, owing to their relative safety and high volatility, are polar organic solvent, more preferably Ci-C 4 alcohol. Alternatively the composition may be a composition other than one comprising the specific combinations iiiiiiiv or v of particle, silicone and solvent disclosed above.
Thermosetting resin composition for sealing packing of semiconductor, and semiconductor device. Also for the avoidance of doubt and aerosol way of illustration in this specification, a composition with microclusters comprising silica-based particles yields support for a composition with microclusters consisting essentially of and consisting of silica-based particles.
This varnish was made in a manner similar to Varnish 7A except that ten 10 grams of D silicone, made commercially available by Dow Corning, was used in lieu of the polydimethylsiloxane made available by Bluestar. For silica R, the average size of silica aggregates increases from nm to nm when silicone changes from DC 5 to DC but there is no clear relationship between the average size of silica clusters and the transparency of film.
EP Kind code of ref document: Most preferably, the surface is, or comprises, glass.
The composition as claimed in claim 1 or claim 2, wherein the silica-based particles are hydrophobically-modified fumed silica particles. It is used in paints and coatings, adhesives and sealants, and silicone rubber. In an often preferred embodiment, the silica-based particle used is silica, especially pyrogenically produced silica i. Pump dispersers whether spray or non-spray pumps and pouring applications bottles etc are also possible. Request for preliminary examination filed after expiration of 19th month from priority date pct application filed from These compositions 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.
Aerosil R 812 S
The composition of this invention may be useful for preparing long-lasting or even permanent coating. The resulting combination was vigorously mixed to produce a diluted hydrophobic premix wherein mixing was achieved under conditions of standard temperature and pressure.
Moreover, such coatings, subsequent to being applied, yield surfaces that make cleaning easier and faster for the consumer. 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.
Fifty 50 grams of silica, made commercially available by Evonik Degussa GmbH as Aerosil R particle size about 7 nmwere combined with fifty 50 grams of polydimethylsiloxane made commercially available by Bluestar Silicones under the Bluestar BP name and one 1 litre of isopropyl alcohol.