A curable silicone composition is provided that comprises a reaction product of a reaction of (I) a clustered functional polyorganopolysiloxane having at least one radical curable group selected from an acrylate group and a methacrylate group; (II) a silicone reactive diluent, and a (III) a radical initiator.

A curable silicone composition is provided that comprises a reaction product of a reaction of (I) a clustered functional polyorganopolysiloxane having at least one radical curable group selected from an acrylate group and a methacrylate group; (II) a silicone reactive diluent, and a (III) a radical initiator.

A thermoplastic composition which comprises at least one polyamide, which preferably has a melting point of less than 185° C., and at least one liquid polysiloxane compound which preferably has a viscosity of 750 to 100,000 mPas at 25° C. and is OH terminated, wherein the thermoplastic composition is obtainable by a process comprising the steps: 1a) heating the at least one polyamide to a temperature above the melting point of the at least one polyamide and preferably below 185° C.; 2a) adding under stirring the at least one liquid polysiloxane compound to the heated compound(s) of step 1a), wherein the temperature is kept above the melting point of the at least one polyamide and preferably below 185° C.; and 3a) mixing the obtained mixture of step 2a) preferably at 80° to 180° C., more preferably 110 to 140° C.

Use of this the thermoplastic composition according to the present invention in sealants, adhesives, or as rheological modifier or surface modifier. Furthermore, to a hot melt adhesive comprising the thermoplastic composition according to the present invention. And use of this hot melt in vehicle parts, constructions, windows, glazing, sanitary applications, fittings, roofing, plumbing, appliance application and bonding of panes.

A thermoplastic composition which comprises at least one polyamide, which preferably has a melting point of less than 185° C., and at least one liquid polysiloxane compound which preferably has a viscosity of 750 to 100,000 mPas at 25° C. and is OH terminated, wherein the thermoplastic composition is obtainable by a process comprising the steps: 1a) heating the at least one polyamide to a temperature above the melting point of the at least one polyamide and preferably below 185° C.; 2a) adding under stirring the at least one liquid polysiloxane compound to the heated compound(s) of step 1a), wherein the temperature is kept above the melting point of the at least one polyamide and preferably below 185° C.; and 3a) mixing the obtained mixture of step 2a) preferably at 80° to 180° C., more preferably 110 to 140° C.

Use of this the thermoplastic composition according to the present invention in sealants, adhesives, or as rheological modifier or surface modifier. Furthermore, to a hot melt adhesive comprising the thermoplastic composition according to the present invention. And use of this hot melt in vehicle parts, constructions, windows, glazing, sanitary applications, fittings, roofing, plumbing, appliance application and bonding of panes.

The present invention is: a curable composition comprising a component (A), a component (B), and a component (C), the curable composition comprising the component (A) and the component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:50, the component (A) being a curable polysilsesquioxane compound that comprises a repeating unit represented by a formula (a-1),

R.sup.1SiO.sub.3/2  (a-1)

wherein R.sup.1 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group, the component (B) being fine particles having an average primary particle size of 5 to 40 nm, and the component (C) being a silane coupling agent that comprises a sulfur atom in its molecule. This invention provides: a curable composition that produces a cured product that exhibits excellent adhesion, excellent delamination resistance, and excellent heat resistance, and exhibits excellent workability during the application step, a method for producing the same, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical element-securing adhesive or an optical element sealing material, and an optical device.

The present invention is: a curable composition comprising a component (A), a component (B), and a component (C), the curable composition comprising the component (A) and the component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:50, the component (A) being a curable polysilsesquioxane compound that comprises a repeating unit represented by a formula (a-1),

R.sup.1SiO.sub.3/2  (a-1)

wherein R.sup.1 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group, the component (B) being fine particles having an average primary particle size of 5 to 40 nm, and the component (C) being a silane coupling agent that comprises a sulfur atom in its molecule. This invention provides: a curable composition that produces a cured product that exhibits excellent adhesion, excellent delamination resistance, and excellent heat resistance, and exhibits excellent workability during the application step, a method for producing the same, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical element-securing adhesive or an optical element sealing material, and an optical device.

An objective is to provide a surface-protective PSA sheet capable of reducing adherend damage and well maintaining appearance, etc. The surface-protective PSA sheet capable of reducing adherend damage and well maintaining appearance, etc., comprises a surface layer, a resin substrate layer and a PSA layer, and has a multilayer structure with the resin substrate layer placed between the surface layer and the PSA layer, wherein the surface layer is a layer obtainable by curing a heat-curable composition comprising the following components: (a) a hydroxyl group-containing (meth)acrylic copolymer having a glass transition temperature of −40° C. to 30° C.; (b) an allophanate polyisocyanate and/or a biuret polyisocyanate; and (c) a polysiloxane comprising a hydroxyl group-containing hydrocarbon group and/or polymer.

The present invention is: a curable composition comprising a component (A), a component (B), and a component (C), the curable composition comprising the component (A) and the component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:50, the component (A) being a curable polysilsesquioxane compound that comprises a repeating unit represented by a formula (a-1),

R.sup.1SiO.sub.3/2  (a-1)

wherein R.sup.1 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group, the component (B) being fine particles having an average primary particle size of 5 to 40 nm, and the component (C) being a silane coupling agent that comprises a nitrogen atom in its molecule. This invention provides: a curable composition that produces a cured product that exhibits excellent adhesion, excellent delamination resistance, and excellent heat resistance, and exhibits excellent workability during the application step, a method for producing the same, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical element-securing adhesive or an optical element sealing material, and an optical device.

A condensation curable gel composition is disclosed. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one hydrolysable and/or hydroxyl functional group(s) per molecule; (ii) a cross-linker selected from the group of a silicone, an organic polymer, a monosilane or a disilane molecule which contains at least two hydrolysable groups per molecule; and (iii) a condensation catalyst selected from the group of titanates, zirconates or tin (II). The molar ratio of hydroxyl and/or hydrolysable groups in polymer (i) to hydrolysable groups from component (ii) is between 0.5:1 and 1:1 using a monosilane cross-linker or 0.75:1 to 3:1 using disilanes. The titanates and zirconates comprise M-OR functions where M is titanium or zirconium and R is an aliphatic hydrocarbon group. The molar ratio of M-OR or tin (II) functions to the hydroxyl and/or hydrolysable groups in polymer (i) is comprised between 0.01:1 and 0.5:1.

A condensation curable gel composition is disclosed. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one hydrolysable and/or hydroxyl functional group(s) per molecule; (ii) a cross-linker selected from the group of a silicone, an organic polymer, a monosilane or a disilane molecule which contains at least two hydrolysable groups per molecule; and (iii) a condensation catalyst selected from the group of titanates, zirconates or tin (II). The molar ratio of hydroxyl and/or hydrolysable groups in polymer (i) to hydrolysable groups from component (ii) is between 0.5:1 and 1:1 using a monosilane cross-linker or 0.75:1 to 3:1 using disilanes. The titanates and zirconates comprise M-OR functions where M is titanium or zirconium and R is an aliphatic hydrocarbon group. The molar ratio of M-OR or tin (II) functions to the hydroxyl and/or hydrolysable groups in polymer (i) is comprised between 0.01:1 and 0.5:1.