A one or more component moisture cure Organosiloxane composition that has strength in an uncured state (commonly referred to in the industry as “green strength”) and its uses. The composition comprises an organopolysiloxane polymer having a viscosity of at least 1000 mPa.Math.s at 25° C. and not less than two silicon-bonded hydroxyl groups and/or silicon bonded hydrolysable groups; a suitable catalyst; a cross-linker adapted to react with organopolysiloxane polymer when catalysed with the catalyst; and optionally one or more rheology modifiers and 0 to 10% by weight of the composition of one or more extenders or plasticisers but in particular the composition contains a precipitated calcium carbonate filler in an amount of from 50 to 70 weight % of the total composition.

A one or more component moisture cure Organosiloxane composition that has strength in an uncured state (commonly referred to in the industry as “green strength”) and its uses. The composition comprises an organopolysiloxane polymer having a viscosity of at least 1000 mPa.Math.s at 25° C. and not less than two silicon-bonded hydroxyl groups and/or silicon bonded hydrolysable groups; a suitable catalyst; a cross-linker adapted to react with organopolysiloxane polymer when catalysed with the catalyst; and optionally one or more rheology modifiers and 0 to 10% by weight of the composition of one or more extenders or plasticisers but in particular the composition contains a precipitated calcium carbonate filler in an amount of from 50 to 70 weight % of the total composition.

Provided is a one part, dual curable composition comprising (A) a first acrylic functional polyorganosiloxane with at least one moisture curable functional group, (B) a second acrylic functional polyorganosiloxane, which may optionally contain a moisture curable functional group, and (C) a third functional polyorganosiloxane, which optionally contains an acrylic and moisture curable functional group. The combination of (A), (B), and (C) provides a composition that is both moisture curable and radiation curable and provides a material that is fast curing via the dual cure functionality and provides a cured material exhibiting a relatively low modulus, good adhesion, and optical clarity.

Provided is a one part, dual curable composition comprising (A) a first acrylic functional polyorganosiloxane with at least one moisture curable functional group, (B) a second acrylic functional polyorganosiloxane, which may optionally contain a moisture curable functional group, and (C) a third functional polyorganosiloxane, which optionally contains an acrylic and moisture curable functional group. The combination of (A), (B), and (C) provides a composition that is both moisture curable and radiation curable and provides a material that is fast curing via the dual cure functionality and provides a cured material exhibiting a relatively low modulus, good adhesion, and optical clarity.

Two part silicone lamination adhesive compositions which cure via a condensation cure chemistry using titanium and/or zirconium based catalysts at room temperature are disclosed. The compositions comprise: (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; and (iii) a condensation catalyst selected from the group of titanates and zirconates. Polymer (i) is not stored in the same part as cross-linker (ii) and catalyst (iii). Catalyst (iii) is present in a molar amount which is at least 50% of the moisture present cumulatively in the parts of the composition. The molar ratio of silicon bonded hydroxyl groups in polymer (i) to hydrolysable groups in cross-linker (ii) is above 0.15. The molar ratio of the silicon bonded hydroxyl groups in polymer (i) to M-OR functions is greater than 10, where M is titanium or zirconium.

Two part silicone lamination adhesive compositions which cure via a condensation cure chemistry using titanium and/or zirconium based catalysts at room temperature are disclosed. The compositions comprise: (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; and (iii) a condensation catalyst selected from the group of titanates and zirconates. Polymer (i) is not stored in the same part as cross-linker (ii) and catalyst (iii). Catalyst (iii) is present in a molar amount which is at least 50% of the moisture present cumulatively in the parts of the composition. The molar ratio of silicon bonded hydroxyl groups in polymer (i) to hydrolysable groups in cross-linker (ii) is above 0.15. The molar ratio of the silicon bonded hydroxyl groups in polymer (i) to M-OR functions is greater than 10, where M is titanium or zirconium.

The present invention relates to: 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 100:30, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical device-securing adhesive or an optical device sealing material. The present invention provides a curable composition that produces a cured product that exhibits excellent transparency, excellent heat resistance, excellent crack resistance, and high adhesion, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical device-securing adhesive or an optical device sealing material, a sealed optical device in which an optical device is sealed with a cured product of the curable composition, and a method for producing the same. Component (A): a silane compound copolymer (I) that is represented by a formula (a-1), wherein R.sup.1 is a hydrogen atom or the like, X.sup.0 is a halogen atom, a cyano group, or a group represented by OG (wherein G is a protecting group for a hydroxyl group), D is a single bond or the like, R.sup.2 is an alkyl group having 1-20 carbon atoms or the like, Z is a hydroxyl group, an alkoxy group having 1-10 carbon atoms, or a halogen atom, m and n are a positive integer, and o, p, q, and r are 0 or a positive integer, Component (B): at least one silane coupling agent selected from a silane coupling agent that includes a nitrogen atom in its molecule and a silane coupling agent that includes an epoxy group in its molecule, and Component (C): a silane coupling agent that has an acid anhydride structure.
(CHR.sup.1X.sup.0-D-SiO.sub.3/2).sub.m(R.sup.2SiO.sub.3/2).sub.n(CHR.sup.1X.sup.0-D-SiZO.sub.2/2).sub.o(R.sup.2SiZO.sub.2/2).sub.p(CHR.sup.1X.sup.0-D-SiZ.sub.2O.sub.1/2).sub.q(R.sup.2SiZ.sub.2O.sub.1/2).sub.r   (a-1)

The present invention relates to: 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 100:30, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical device-securing adhesive or an optical device sealing material. The present invention provides a curable composition that produces a cured product that exhibits excellent transparency, excellent heat resistance, excellent crack resistance, and high adhesion, a cured product obtained by curing the curable composition, a method for using the curable composition as an optical device-securing adhesive or an optical device sealing material, a sealed optical device in which an optical device is sealed with a cured product of the curable composition, and a method for producing the same. Component (A): a silane compound copolymer (I) that is represented by a formula (a-1), wherein R.sup.1 is a hydrogen atom or the like, X.sup.0 is a halogen atom, a cyano group, or a group represented by OG (wherein G is a protecting group for a hydroxyl group), D is a single bond or the like, R.sup.2 is an alkyl group having 1-20 carbon atoms or the like, Z is a hydroxyl group, an alkoxy group having 1-10 carbon atoms, or a halogen atom, m and n are a positive integer, and o, p, q, and r are 0 or a positive integer, Component (B): at least one silane coupling agent selected from a silane coupling agent that includes a nitrogen atom in its molecule and a silane coupling agent that includes an epoxy group in its molecule, and Component (C): a silane coupling agent that has an acid anhydride structure.
(CHR.sup.1X.sup.0-D-SiO.sub.3/2).sub.m(R.sup.2SiO.sub.3/2).sub.n(CHR.sup.1X.sup.0-D-SiZO.sub.2/2).sub.o(R.sup.2SiZO.sub.2/2).sub.p(CHR.sup.1X.sup.0-D-SiZ.sub.2O.sub.1/2).sub.q(R.sup.2SiZ.sub.2O.sub.1/2).sub.r   (a-1)

The present invention is a curable composition comprising a component (A), a component (B), a component (C), and a component (D), the curable composition comprising the component (A) and the component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:20, the component (A) being a silane compound (co)polymer that is represented by a formula (a-1) or a formula (a-2),

(CHR.sup.1X.sup.0-D-SiO.sub.3/2).sub.m(R.sup.2SiO.sub.3/2).sub.n(CHR.sup.1X.sup.0-D-SiZ.sup.1O.sub.2/2).sub.o(R.sup.2SiZ.sup.2O.sub.2/2).sub.p(CHR.sup.1X.sup.0-D-SiZ.sup.3.sub.2O.sub.1/2).sub.q(R.sup.2SiZ.sup.4.sub.2O.sub.1/2).sub.r   (a-1)

(R.sup.3SiO.sub.3/2).sub.s(R.sup.3SiZ.sup.5O.sub.2/2).sub.t(R.sup.3SiZ.sup.5.sub.2O.sub.1/2).sub.u   (a-2) the component (B) being fine particles having an average primary particle size of more than 0.04 μm and 8 μm or less, the component (C) being a silane coupling agent that comprises a nitrogen atom in its molecule, and the component (D) being a silane coupling agent that comprises an acid anhydride structure in its molecule, and an optical element-securing composition, and a cured product, and an optical element-securing material, and a method for using the curable composition, and an optical device.

The present invention is a curable composition comprising a component (A), a component (B), a component (C), and a component (D), the curable composition comprising the component (A) and the component (B) in a mass ratio (component (A):component (B)) of 100:0.3 to 100:20, the component (A) being a silane compound (co)polymer that is represented by a formula (a-1) or a formula (a-2),

(CHR.sup.1X.sup.0-D-SiO.sub.3/2).sub.m(R.sup.2SiO.sub.3/2).sub.n(CHR.sup.1X.sup.0-D-SiZ.sup.1O.sub.2/2).sub.o(R.sup.2SiZ.sup.2O.sub.2/2).sub.p(CHR.sup.1X.sup.0-D-SiZ.sup.3.sub.2O.sub.1/2).sub.q(R.sup.2SiZ.sup.4.sub.2O.sub.1/2).sub.r   (a-1)

(R.sup.3SiO.sub.3/2).sub.s(R.sup.3SiZ.sup.5O.sub.2/2).sub.t(R.sup.3SiZ.sup.5.sub.2O.sub.1/2).sub.u   (a-2) the component (B) being fine particles having an average primary particle size of more than 0.04 μm and 8 μm or less, the component (C) being a silane coupling agent that comprises a nitrogen atom in its molecule, and the component (D) being a silane coupling agent that comprises an acid anhydride structure in its molecule, and an optical element-securing composition, and a cured product, and an optical element-securing material, and a method for using the curable composition, and an optical device.