The present invention relates to an aerogel composite powder superior in thermal insulation and flexibility, the aerogel composite powder comprising an aerogel component and a silica particle.

A coat-forming composition including (A) to (C) below, and containing 100 to 2000 parts by mass of (C) below relative to 100 parts by mass of (A) below: (A) a mixture of coating film-forming components containing (A-1) and (A-2) below at a mass ratio of (A-1):(A-2)=1:1.1 to 1:4.9, (A-1) a hydrolyzable group-containing silicone oligomer having a kinematic viscosity at 25° C. of 10 mm2s-1 or less, and (A-2) a reactive silicone oil having, at one terminal, a functional group from the group of a mercapto group, an amino group, and a monocarbinol group, provided that the reactive silicone oil having a monocarbinol group at one terminal has a functional group equivalent of 4500 g/mol or less; (B) a hydrolysis catalyst; and (C) an organic solvent. The coat-forming composition can form a coating film having both water sliding ability and durability (water sliding ability after abrasion).

A coat-forming composition including (A) to (C) below, and containing 100 to 2000 parts by mass of (C) below relative to 100 parts by mass of (A) below: (A) a mixture of coating film-forming components containing (A-1) and (A-2) below at a mass ratio of (A-1):(A-2)=1:1.1 to 1:4.9, (A-1) a hydrolyzable group-containing silicone oligomer having a kinematic viscosity at 25° C. of 10 mm2s-1 or less, and (A-2) a reactive silicone oil having, at one terminal, a functional group from the group of a mercapto group, an amino group, and a monocarbinol group, provided that the reactive silicone oil having a monocarbinol group at one terminal has a functional group equivalent of 4500 g/mol or less; (B) a hydrolysis catalyst; and (C) an organic solvent. The coat-forming composition can form a coating film having both water sliding ability and durability (water sliding ability after abrasion).

Described is a process for producing SiOC-bonded polyether siloxanes branched in the siloxane portion from cyclic branched siloxanes of the D/T type, wherein said process comprises in a first step reacting the mixtures of cyclic branched siloxanes of the D/T type with acetic anhydride optionally in admixture with simple siloxane cycles under acid catalysis to afford acetoxy-bearing branched siloxanes, in a second step performing the equilibration of the acetoxy-modified branched siloxane with trifluoromethanesulfonic acid, preferably with addition of acetic acid, and in a third step reacting the trifluoromethanesulfonic acid-treated acetoxysiloxane with polyetherols optionally in the presence of bases and optionally in the presence of an inert solvent.

Described is a process for producing SiOC-bonded polyether siloxanes branched in the siloxane portion from cyclic branched siloxanes of the D/T type, wherein said process comprises in a first step reacting the mixtures of cyclic branched siloxanes of the D/T type with acetic anhydride optionally in admixture with simple siloxane cycles under acid catalysis to afford acetoxy-bearing branched siloxanes, in a second step performing the equilibration of the acetoxy-modified branched siloxane with trifluoromethanesulfonic acid, preferably with addition of acetic acid, and in a third step reacting the trifluoromethanesulfonic acid-treated acetoxysiloxane with polyetherols optionally in the presence of bases and optionally in the presence of an inert solvent.

The present invention encompasses materials and methods for catalyzing the cross-linking and curing of siloxane polymers. In particular, the present disclosure provides materials, methods, and conditions for vapor phase catalysis for curing organosiloxane polymers and resins, including resin linear organosiloxane block copolymers, as well as the incorporation of those methods into processes for making light emitting devices, including light emitting diodes.

The present invention encompasses materials and methods for catalyzing the cross-linking and curing of siloxane polymers. In particular, the present disclosure provides materials, methods, and conditions for vapor phase catalysis for curing organosiloxane polymers and resins, including resin linear organosiloxane block copolymers, as well as the incorporation of those methods into processes for making light emitting devices, including light emitting diodes.

A polyorganosiloxane may be high in elasticity and/or strength. The polyorganosiloxane may include an M unit (R.sup.1R.sup.2R.sup.3SiO.sub.1/2) at a content of 10 mol. % or more relative to the total of silicon and a T unit (R.sup.6SiO.sub.3/2) at a content of 80 mol. % or less relative to the total of silicon. The polyorganosiloxane may have an alkoxy group bound, at a content of 0.07 to 4 wt. %, based on total polyorganosiloxane weight, and a reactive functional group bound to silicon, with 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane. The weight loss of the polyorganosiloxane at 110° C. under 0.15 torr for 2 hours may be 5 wt. % or less.

A polyorganosiloxane may be high in elasticity and/or strength. The polyorganosiloxane may include an M unit (R.sup.1R.sup.2R.sup.3SiO.sub.1/2) at a content of 10 mol. % or more relative to the total of silicon and a T unit (R.sup.6SiO.sub.3/2) at a content of 80 mol. % or less relative to the total of silicon. The polyorganosiloxane may have an alkoxy group bound, at a content of 0.07 to 4 wt. %, based on total polyorganosiloxane weight, and a reactive functional group bound to silicon, with 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane. The weight loss of the polyorganosiloxane at 110° C. under 0.15 torr for 2 hours may be 5 wt. % or less.

A resin composition including a silicon-containing resin component and a solvent, the silicon-containing resin component includes (I) mentioned below, the solvent including at least one of a terpene compound having at least one of a hydroxy group and an acetoxy group, and a cyclic skeleton-containing acetate compound (excluding the terpene compound): (I) a polysilane-polysiloxane resin having a polysilane structure and a polysiloxane structure.