The present invention provides, for example, a method for efficiently producing a polysiloxane having a siloxane constituent unit while making it possible to improve safety and reduce environmental burden. The above-mentioned problem is solved by a method comprising a polymerization step of polymerizing a silane-based compound and a diol compound in the presence of a transesterification catalyst including at least a phosphorus compound, in which the silane-based compound is selected from a specific diaryloxysilane compound, a specific dialkoxysilane compound, and a specific silicon compound, and in the polymerization step, a polysiloxane having a siloxane constituent unit represented by any of formula (1-1) to formula (1-4) is produced. (In the formulas, R.sup.1-R.sup.10, R.sup.30-R.sup.33, Z.sub.1, Z.sub.2, J.sub.1, K.sub.1, A.sub.1, A.sub.2, L.sub.1, L.sub.2, and X are as described in the description of the present application.)

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A photosensitive resin composition comprising a silicone structure-containing polymer having crosslinking groups or crosslinking reaction-susceptible reactive sites in the molecule is coated onto a substrate to form a photosensitive resin coating which has improved substrate adhesion, a pattern forming ability, crack resistance, heat resistance, and reliability as protective film.

A photosensitive resin composition comprising a silicone structure-containing polymer having crosslinking groups or crosslinking reaction-susceptible reactive sites in the molecule is coated onto a substrate to form a photosensitive resin coating which has improved substrate adhesion, a pattern forming ability, crack resistance, heat resistance, and reliability as protective film.

A photosensitive resin composition comprising an isocyanurate-modified silicone resin containing an epoxy group in the molecule is easy to form a resin coating which has high transparency, light resistance and heat resistance, is amenable to micro-processing, and is useful in applications for protecting and encapsulating optical devices. The coating can be processed in thick film form to define a pattern having a fine size and perpendicularity, and becomes a cured coating which has improved adhesion to substrates, electronic parts, semiconductor devices, and supports for circuit boards, mechanical properties, electric insulation, and crack resistance, and is reliable as an insulating protective film.

A photosensitive resin composition comprising an isocyanurate-modified silicone resin containing an epoxy group in the molecule is easy to form a resin coating which has high transparency, light resistance and heat resistance, is amenable to micro-processing, and is useful in applications for protecting and encapsulating optical devices. The coating can be processed in thick film form to define a pattern having a fine size and perpendicularity, and becomes a cured coating which has improved adhesion to substrates, electronic parts, semiconductor devices, and supports for circuit boards, mechanical properties, electric insulation, and crack resistance, and is reliable as an insulating protective film.

A white photosensitive resin composition comprising (A) an acid crosslinkable group-containing silicone resin, (B) a photoacid generator, and (C) a white pigment has a sufficient reflectivity, good reliability with respect to adhesion and crack resistance, resolution, flexibility, and light resistance.

The present technology provides a curable silicone composition comprising a polymer A comprising one or more alkenyl functional groups; a polymer B comprising one or more hydride functional groups; and a filler, wherein at least one of polymer A and/or polymer B is a silicone polymer.

The present technology provides a curable silicone composition comprising a polymer A comprising one or more alkenyl functional groups; a polymer B comprising one or more hydride functional groups; and a filler, wherein at least one of polymer A and/or polymer B is a silicone polymer.

The present invention provides an addition-curable self-adhesive silicone rubber composition and a silicone rubber cured product.

An addition-curable self-adhesive silicone rubber composition which contains:

a predetermined amount of (A) an alkenyl group-containing organopolysiloxane which has at least two alkenyl groups that are bonded to silicon atoms in each molecule;

a predetermined amount of (B-1) an organosilicon compound having 1-100 silicon atoms, which has at least one phenylene skeleton in each molecule, while having at least one hydrogen atom that is bonded to a silicon atom;

a predetermined amount of (B-2) an organohydrogen polysiloxane which contains at least two hydrogen atoms that are bonded to silicon atoms in each molecule, and which does not contain an aromatic group;

a predetermined amount of (C) a platinum-based catalyst;

a predetermined amount of (D) a benzotriazole derivative; and

a predetermined amount of (E) an acetylene alcohol compound or a compound which is obtained by modifying an alcoholic hydroxyl group of the acetylene alcohol compound with a silane or a siloxane.

The present invention provides an addition-curable self-adhesive silicone rubber composition and a silicone rubber cured product.

An addition-curable self-adhesive silicone rubber composition which contains:

a predetermined amount of (A) an alkenyl group-containing organopolysiloxane which has at least two alkenyl groups that are bonded to silicon atoms in each molecule;

a predetermined amount of (B-1) an organosilicon compound having 1-100 silicon atoms, which has at least one phenylene skeleton in each molecule, while having at least one hydrogen atom that is bonded to a silicon atom;

a predetermined amount of (B-2) an organohydrogen polysiloxane which contains at least two hydrogen atoms that are bonded to silicon atoms in each molecule, and which does not contain an aromatic group;

a predetermined amount of (C) a platinum-based catalyst;

a predetermined amount of (D) a benzotriazole derivative; and

a predetermined amount of (E) an acetylene alcohol compound or a compound which is obtained by modifying an alcoholic hydroxyl group of the acetylene alcohol compound with a silane or a siloxane.