The present invention relates to an emulsion-based high release additive for a release sheet, the additive being characterized by being obtained by dispersing in water a condensation product (A) obtained by subjecting the following to a dehydration condensation reaction: (A-1) a polydiorganosiloxane which has an average degree of polymerization of 100-300,000 and which has one or more hydroxyl groups or hydrolyzable groups per molecule; and (A-2) a polyorganosiloxane resin, which contains (SiO.sub.4/2) units and (R.sub.3SiO.sub.1/2) units (in the formulae, the R groups each represent independently a monovalent hydrocarbon group having 1-12 carbon atoms and not having an aliphatic unsaturated bond or an alkenyl group having 2-6 carbon atoms) as primary components, in which the molar ratio of (R.sub.3SiO.sub.1/2) units relative to (SiO.sub.4/2) units is 0.6-1.2 and in which the total content of hydroxyl groups and hydrolyzable groups is not lower than 2.1 mass % and lower than 10.0 mass %. The present invention can obtain a silicone cured coating film having a high release force by adding the additive to a curable composition for a release sheet such as a release paper or release film, coating the same on a variety of base materials and curing.

Provided herein is a light diffusing material having excellent light transmittance, light diffusion properties, and mechanical properties. The light diffusing material comprises a curable organopolysiloxane composition, comprising: A) an organopolysiloxane having reactive groups; B) one or more inorganic fillers; and C) an organosilicon compound different from component A), and comprising component(s) C1) and/or C2). Component C1) is an organosilicon compound having a reactive functional group that can bond with component A), a hydrolyzable silyl group and/or a silicon atom-bonded hydroxyl group, and two or more silicon atoms, in the molecule. Component C2) is an organosilicon compound having a reactive functional group with three or more carbon atoms, which can bond with component A), a hydrolyzable silyl group and/or a silicon atom-bonded hydroxyl group, and one or more silicon atoms, in the molecule. The mass of component B) is 30 to 95% relative to the mass of the overall composition.

Provided herein is a light diffusing material having excellent light transmittance, light diffusion properties, and mechanical properties. The light diffusing material comprises a curable organopolysiloxane composition, comprising: A) an organopolysiloxane having reactive groups; B) one or more inorganic fillers; and C) an organosilicon compound different from component A), and comprising component(s) C1) and/or C2). Component C1) is an organosilicon compound having a reactive functional group that can bond with component A), a hydrolyzable silyl group and/or a silicon atom-bonded hydroxyl group, and two or more silicon atoms, in the molecule. Component C2) is an organosilicon compound having a reactive functional group with three or more carbon atoms, which can bond with component A), a hydrolyzable silyl group and/or a silicon atom-bonded hydroxyl group, and one or more silicon atoms, in the molecule. The mass of component B) is 30 to 95% relative to the mass of the overall composition.

Provided is a photosensitive resin composition comprising (A) a polymer including a silicone skeleton and (B) photo-acid generators, wherein the photo-acid generators (B) comprise (B1) a photo-acid generator which is an onium salt and (B2) a photo-acid generator which is not an onium salt.

A method including providing a substrate having a surface, the surface is hydroxylated and exposing the hydroxylated surface of the substrate to a PDMS oligomer. The PDMS oligomer has a formula of: R.sub.1—Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2—R.sub.2 where at least one of R.sub.1 or R.sub.2 includes: —(CH.sub.2).sub.m—R.sub.3, R.sub.3=one of —Cl, —O—(CH.sub.2).sub.xH, —SiCl.sub.3, or —Si(O—(CH.sub.2).sub.xH).sub.3, x=0 to 10, m=0 to 10, n=10 to 500. R.sub.3 undergoes hydrolysis such that one terminal Si atom of the PDMS oligomer is covalently bonded to the hydroxylated surface by a condensation reaction to form a grafted layer of PDMS polymers on the surface. An article including a substrate having a surface with a grafted layer of PDMS polymers thereon, each of the PDMS polymers have a formula of: -Q.sub.1-Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2-Q2 where Q.sub.1=—O— or —O—(CH.sub.2).sub.m—O—, Q.sub.2=-(-Q.sub.1-Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2—).sub.p-Q.sub.3, Q.sub.3=—OH, —(CH.sub.2).sub.m—OH, —Si(OH).sub.3, or —(CH.sub.2).sub.m—Si(OH).sub.3, m=0 to 10, n=10 to 500, p=0 to 500, Q.sub.1=end of the PDMS polymer covalently bonded to the surface.

A method including providing a substrate having a surface, the surface is hydroxylated and exposing the hydroxylated surface of the substrate to a PDMS oligomer. The PDMS oligomer has a formula of: R.sub.1—Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2—R.sub.2 where at least one of R.sub.1 or R.sub.2 includes: —(CH.sub.2).sub.m—R.sub.3, R.sub.3=one of —Cl, —O—(CH.sub.2).sub.xH, —SiCl.sub.3, or —Si(O—(CH.sub.2).sub.xH).sub.3, x=0 to 10, m=0 to 10, n=10 to 500. R.sub.3 undergoes hydrolysis such that one terminal Si atom of the PDMS oligomer is covalently bonded to the hydroxylated surface by a condensation reaction to form a grafted layer of PDMS polymers on the surface. An article including a substrate having a surface with a grafted layer of PDMS polymers thereon, each of the PDMS polymers have a formula of: -Q.sub.1-Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2-Q2 where Q.sub.1=—O— or —O—(CH.sub.2).sub.m—O—, Q.sub.2=-(-Q.sub.1-Si(CH.sub.3).sub.2—(O—Si(CH.sub.3).sub.2—).sub.n—O—Si(CH.sub.3).sub.2—).sub.p-Q.sub.3, Q.sub.3=—OH, —(CH.sub.2).sub.m—OH, —Si(OH).sub.3, or —(CH.sub.2).sub.m—Si(OH).sub.3, m=0 to 10, n=10 to 500, p=0 to 500, Q.sub.1=end of the PDMS polymer covalently bonded to the surface.

Block-modified polysiloxanes and compositions comprising the block-modified polysiloxanes are useful in the field of textile finishing. Emulsions comprising the compositions have a very small and narrowly distributed particle size which increases penetration, and provide good softening properties coupled with good hydrophilicity.

To provide a siliceous film manufacturing composition that can fill a narrow and a high aspect ratio trench and can produce a thick siliceous film. [Means for Solution] The present invention provides a siliceous film manufacturing composition that comprises, (a) a block copolymer having a linear and/or cyclic polysilane backbone block with or more silicon atoms and a polycarbosilane backbone block with or more silicon atoms, and (b) a solvent.

A hybrid siloxane oligomer is shown and described herein. A hybrid siloxane oligomer comprises organosilicon units wherein the oligomer comprises organosilicon units with fluoro-functional groups, and organosilicon units with other reactive functionality. The oligomers can be employed to form a coating on a surface of an article to provide a hydrophobic and/or oleophobic surface coating, which may impart other beneficial properties to the article.

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.