Abstract: An aqueous, particle-stabilized Pickering emulsion along with methods or processes for producing the same and particles produced therefrom.

Abstract: Particles P and methods of making the same. The particles P are composed of a core K comprising crosslinked silicone elastomer composition X and of a shell H of silica S. Where the core K includes a reinforcing filler F which is selected from pyrogenic or precipitated hydrophobic silicas having DIN 66131 BET surface areas of at least 50 m2/g and also from carbon blacks and activated carbons and silicone resins.

Abstract: A process for preparing spherical silicone resin particles in which alkoxysilanes are reacted with water to form a hydrolysate is provided. The resulting silicone resin particles are isolated from a mixture. The silicone resin particles are dried and the particles are deagglomerated by ultrasonic sieving.

Abstract: Proppant particles coated with a resin system containing a reactive resin and an organopolysiloxane having at least three successive siloxy units and at least one pendent or terminal group which contains at least four atoms selected from C, N, P, O, and S, exhibit higher degrees of coating and decreased fracture and release of fines at high pressure, thus enhancing fracking performance.

Abstract: Coated proppants useful in fracking operations in oil and gas production are coated with a novolac resin containing a linear or cyclic organopolysiloxane of specific composition. The coatings are more fracture resistant, thus producing less fines during use, resulting in longer production campaigns.

Abstract: Proppant particles coated with a resin system containing a reactive resin and an organopolysiloxane having at least three successive siloxy units and at least one pendent or terminal group which contains at least four atoms selected from C, N, P, O, and S, exhibit higher degrees of coating and decreased fracture and release of fines at high pressure, thus enhancing fracking performance.

Abstract: Spherical polysilsesquioxane particles in which, in a first step, trialkoxysilane of formula (I) RSi(OR1)3 ??(I), in which R represents a C1-16 hydrocarbon radical whose carbon chain may be interrupted by nonadjacent —O— groups, and Rl represents a C1-4 alkyl radical, is reacted with acidified water having a pH of not more than 6 with commixing to afford a hydrolyzate, in a second step the hydrolyzate is mixed with a solution of a base in water or C1-4 alkanol, in a third step the mixture is stored for 30 minutes to 6 hours, in a fourth step the mixture is mixed with a further solution of a base in water or C1-4 alkanol, in a fifth step the mixture is agitated for at least 5 minutes, and in a sixth step the polysilsesquioxane particles are isolated.

Abstract: Spherical organopolysiloxane resin particles with improved flow properties can be reproducibly obtained employing trialkoxysilanes having different hydrolysable chlorine contents by regulating pH in a first, acid hydrolysis step, and then adjusting pH in a second step to a desired value between 1 and 6. Particles are allowed to grow without agitation in a subsequent basic condensation step.

Abstract: Proppants coated with a cured reactive resin composition containing 92-99.5 wt. % of a reactive resin and 0.5 to 8 wt. % of a silicone resin containing at least 5 wt. % of alkoxy groups and at least 20 mol percent of T and/or Q units, in liquid form, exhibit high freedom from fines generation, and are free flowing.

Abstract: Spherical polysilsesquioxane particles are prepared by reacting trialkoxysilanes of formula, (I) RSi(OR1)3??(I), where R represents a C1-16 hydrocarbon radical whose carbon chain may be interrupted by nonadjacent —O— groups, R1 represents a C1-4 alkyl radical, with acidified water having a pH?6 with stirring to produce a hydrolysate, in a second step mixing the hydrolysate with a solution of NaOH and/or KOH, and in a third step storing the mixture is stored for at least 8 h before isolating polysilsesquioxane particles thus formed.

Abstract: Spherical silsesquioxane particles are formed by controlled hydrolysis of trialkoxysilane(s) in acidic media, followed by addition of base, storage for at least 2 hours, and spray drying. Essentially non-agglomerated spherical particles are produced without milling.

Abstract: Proppants coated with a cured reactive resin composition containing 92-99.5 wt. % of a reactive resin and 0.5 to 8 wt. % of a silicone resin containing at least 5 wt. % of alkoxy groups and at least 20 mol percent of T and/or Q units, in liquid form, exhibit high freedom from fines generation, and are free flowing.

Abstract: Spherical organopolysiloxane resin particles with improved flow properties can be reproducibly obtained employing trialkoxysilanes having different hydrolysable chlorine contents by regulating pH in a first, acid hydrolysis step, and then adjusting pH in a second step to a desired value between 1 and 6. Particles are allowed to grow without agitation in a subsequent basic condensation step.

Abstract: Coated proppants for use in fracking operations for oil and gas production are coated with a reactive resin composition containing 80-99.5 wt. % of a reactive polymer resin, and 0.5 to 8 wt. % of an alkoxy-functional silicone resin. The cured coating exhibits high fracture resistance and yet the proppant particles are free flowing.

Abstract: Coated proppants which exhibit superior proppant coatings and less fines generation are prepared by coating proppant particles with a reactive hybrid resin prepared by reaction of a phenol-formaldehyde resin and a co-reactive organopolysiloxane having at least three repeating siloxy groups, and is in free flowing form.

Abstract: Spherical polysilsesquioxane particles are prepared by reacting trialkoxysilanes of formula, (I) RSi(OR1)3 ??(I), where R represents a C1-16 hydrocarbon radical whose carbon chain may be interrupted by nonadjacent —O— groups, R1 represents a C1-4 alkyl radical, with acidified water having a pH?6 with stirring to produce a hydrolysate, in a second step mixing the hydrolysate with a solution of NaOH and/or KOH, and in a third step storing the mixture is stored for at least 8 h before isolating polysilsesquioxane particles thus formed.

Abstract: Proppants coated with a curable resin containing 2.5-12% of a hydrophobic fumed silica having a BET surface area of 20 to 600 m2/g exhibit high resistance to cracking and flaking, and are useful in fracking operations in subterranean formations for recovery of oil and/or gas.

Abstract: Coated proppants useful in fracking operations in oil and gas production are coated with a novolac resin containing a linear or cyclic organopolysiloxane of specific composition. The coatings are more fracture resistant, thus producing less fines during use, resulting in longer production campaigns.

Abstract: Spherical silsesquioxane particles are formed by controlled hydrolysis of trialkoxysilane(s) in acidic media, followed by addition of base, storage for at least 2 hours, and spray drying. Essentially non-agglomerated spherical particles are produced without milling.

Abstract: Organopolysiloxane gel compositions containing an organopolysiloxane gel produced by hydrosilylation of an unsaturated silicone resin and a compound containing glycoside residues and a hydrosilylatable group with at least one Si—H-functional organopolysiloxane can form creamy, storage-stable gels which are capable of containing large amounts of polar or hydrophilic substances such as water and glycerol while remaining monophasic. The compositions are especially useful in providing cosmetic compositions with a silky skinfeel.