A powder coating composition of the invention comprises a film-forming polymeric component having a d(v,50) in the range of from 25 to 50 microns or a d(v,70) in the range of from 25 to 70 microns, which composition incorporates by dry-blending at least one appearance-modifying additive component and a further component comprising wax-coated silica or consisting of alumina together with aluminium hydroxide. The appearance-modifying additive may be a gloss-reducing component, a texturing component, a metallic or mica component, a colouring pigment, or a further film-forming polymeric material compatible with the first film-forming polymeric material and differing in colouration therefrom, and the further additive may be alumina together with aluminium hydroxide or wax-coated silica together with alumina and/or with aluminium hydroxide or wax-coated silica. Preferably, no more than 70 % by volume of the particles in the film-forming polymeric material are less than 50 microns. A kit of the invention comprises the individual additive components prior to mixing. The kit allows for the flexibl production of a variety of finishes from a gloss powder coating composition, for example a matt or textured or metallic or sparkle finish or a matt textured finish, a matt metallic finish, an antique finish or a contrast texture or metallic sparkle finish.

Powder coating compositions

The present invention relates to novel, organically modified aerogels, uses thereof, and a process for producing them in which a) a hydrogel is introduced as an initial charge, b) the hydrogel obtained in step a) is subjected to surface modification, and c) the surface-modified gel obtained in step b) is dried. The present invention additionally relates to novel, organically modified wet gels, to a process for producing them, and to their use.

Organically modified aerogels, processes for their preparation by surface modification of the aqueous gel, without prior solvent exchange, and subsequent drying, and their use

The present invention relates to a silica reinforced rubber composition and to pneumatic tires having treads comprised of the silica reinforced rubber compositions. The silica reinforced rubber composition comprises at least one elastomer, silica, a silica coupler, a silylating agent and, optionally, carbon black.

Silica reinforced rubber composition and tire with tread

A composition of matter is disclosed wherein the composition comprises: at least one latent mercaptosilane coupling agent; and at least one additional mercaptan. Preferable, the composition comprises: at least one sulfur vulcanizable rubber; at least one latent mercaptosilane coupling agent; at least one latent mercaptosilane activator; at least one filler; and, optionally, at least one additional mercaptosilane. A two pass process for preparing cured articles, such as tires and/or tire treads, which employs the composition is also disclosed.

Mineral-filled elastomer compositions

A coaxial cable connector including a connector body having a rearward sleeve receiving end and an inner engagement surface and an axially movable locking sleeve seated in the rearward sleeve receiving end of the connector body is disclosed. The locking sleeve has a rearward cable receiving end and an opposite forward connector insertion end. The forward connector insertion end is formed with at least one flexible finger for gripping a cable inserted in the sleeve when the locking sleeve is moved from a first position to a second position.

Coaxial connector with a cable gripping feature

Precipitated silicas, characterized in that they have a CTAB surface area (in accordance with ASTM D 3765-92) of 200 to 400 m 2 /g, a DBP index (in accordance with ASTM D 2414) between 230 and 380 ml/100 g as powder and 180-250 g/100 g as granulate, a silanol group density (V 2 -NaOH consumption) of 20 to 30 ml and the following macropore size distribution which is typical of the surface area range involved, determined by means of Hg porosimetry (DIN 66 133) for specific pore size intervals (incremental mode of application): ______________________________________ CTAB surface CTAB surface CTAB surface area range: area range: area range: 200-250 250-300 300-400Pore size m 2 /g m 2 /g m 2 /ginterval nm! Hg consumption in ml/g of silica______________________________________10-20 0.27-0.49 0.35-0.50 0.32-0.4220-30 0.22-0.32 0.15-0.30 0.17-0.2230-40 0.15-0.21 0.12-0.17 0.12-0.1540-50 0.11-0.16 0.09-0.12 0.08-0.1150-60 0.08-0.12 0.06-0.10 0.06-0.09______________________________________

Precipitated silicas, a process for their preparation and their use in vulcanizable rubber mixtures

Hydrophobic precipitated silicic acid is disclosed and its use as a reinforcing filler in plastic masses which are hardenable to form elastomers.

Hydrophobic precipitated silicic acid and compositions containing same

Finely divided precipitated silicic acid is obtained by the method of the invention. Compositions containing the finely divided precipitated silicic acid as a filler distributed in an elastomer such as an organopolysiloxane are disclosed.

Precipitated silicic acid, method and compositions containing same

A process for modifying silicic acids, gels, and silicates by impregnating them with a wax or a thermoplastic material, such as polyethylene. The silicic acids, silica gels, or silicates can be impregnated either as they are being formed or after they have formed by adding an aqueous emulsion or dispersion of wax or thermoplastic material to an aqueous suspension or dispersion of the silicic acids, gels or silicates. The mixture is then filtered, washed, dried, and finely ground. The organically modified silicic acids, gels, and silicates are useful as delustering agents in lacquer systems.

Process for the production of organically modified silicic acids and silicates

The invention relates to the use of precipitated silicic acids have a specific surface area of > 240 m /g for improving the transparency and brightness properties of vulcanisable, pale rubber mixtures.

Use of precipitated silicic acids having a large specific surface area for improving the transparency and brightness properties of vulcanisable, pale rubber mixtures

Robert Kuhlmann

Papers

Precipitated silicas, a process for their preparation and their use in vulcanizable rubber mixtures

Hydrophobic precipitated silicic acid and compositions containing same

Precipitated silicic acid, method and compositions containing same

Process for the production of organically modified silicic acids and silicates

Use of precipitated silicic acids having a large specific surface area for improving the transparency and brightness properties of vulcanisable, pale rubber mixtures