The invention relates to microparticles and compositions thereof as each of them is described in the specification. The invention further relates to microparticles obtained by a process as described in the specification, compositions thereof. The invention further relates to cured compositions as well as to objects or kits-of-parts comprising the microparticles of the invention and/or the compositions thereof and/or the cured compositions thereof. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for lowering the gloss of coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making 3D-printed objects. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making absorbent and superabsorbent objects.

The invention relates to microparticles and compositions thereof as each of them is described in the specification. The invention further relates to microparticles obtained by a process as described in the specification, compositions thereof. The invention further relates to cured compositions as well as to objects or kits-of-parts comprising the microparticles of the invention and/or the compositions thereof and/or the cured compositions thereof. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for lowering the gloss of coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making soft-touch matte coatings. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making 3D-printed objects. The invention further relates to the use of the microparticles of the invention and/or the compositions thereof, for making absorbent and superabsorbent objects.

A method for manufacturing micronized rubber powders including grinding of a rubber granulated feedstock, size classification and storage of the micronized rubber powders thus obtained. A rubber formulation including at least one natural or synthetic rubber, a micronized rubber composition and optionally one or more of processing aids, antidegradants, fillers, accelerators and curatives. A method for manufacturing a rubber product, as well as to a solid rubber product.

Disclosed is a transparent organopolysiloxane composition consisting of a powdery silicone resin having the following general formula (1), a carboxylic acid compound or a natural oil containing the carboxylic acid compound, and an aprotic solvent.

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(wherein R.sup.1 each independently represents a substituted or unsubstituted divalent hydrocarbon group having 1 to 20 carbon atoms which may contain a hetero atom, R.sup.2 each independently represents a hydrogen atom, a methyl group, or an ethyl group, and a represents an integer of 2 to 70).

The claimed material relates to a mixed silica and silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.

The claimed material relates to a mixed silica and silicate fiber and polymer composite having enhanced modulus, viscoelastic and rheological properties.

Provided is a water-absorbing agent having an excellent ability to absorb and retain liquid and an excellent liquid suction power. The water-absorbing agent contains a polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfies all of the following physical properties (a) to (e): (a) a weight average particle diameter (D50) is 300 μm or more and less than 400 μm; (b) a proportion of particles with a particle diameter of 600 μm or more and less than 850 μm is less than 10 weight %; (c) an average gap radius is 100 μm or more and less than 180 μm; (d) a CRC is 28 g/g or more and less than 34 g/g; and (e) an AAP is 24 g/g or more.

Provided is a water-absorbing agent having an excellent ability to absorb and retain liquid and an excellent liquid suction power. The water-absorbing agent contains a polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfies all of the following physical properties (a) to (e): (a) a weight average particle diameter (D50) is 300 μm or more and less than 400 μm; (b) a proportion of particles with a particle diameter of 600 μm or more and less than 850 μm is less than 10 weight %; (c) an average gap radius is 100 μm or more and less than 180 μm; (d) a CRC is 28 g/g or more and less than 34 g/g; and (e) an AAP is 24 g/g or more.

A process for preparing a powder of a material of natural origin, which comprises a step of treating a substance containing at least 70% by weight of one or more leather wastes in particle form in a twin-screw extruder, wherein a temperature profile is applied that increases from an initial temperature of between 10 and 40° C. up to a maximum temperature of between 60 and 120° C., in the presence of water in an amount such that the weight ratio of water to said substance is between 0.20 and 6.

A process for preparing a powder of a material of natural origin, which comprises a step of treating a substance containing at least 70% by weight of one or more leather wastes in particle form in a twin-screw extruder, wherein a temperature profile is applied that increases from an initial temperature of between 10 and 40° C. up to a maximum temperature of between 60 and 120° C., in the presence of water in an amount such that the weight ratio of water to said substance is between 0.20 and 6.