An aspect of the present invention is directed to a vibration damping material for use in a mount part for supporting a motor, the vibration damping material including: a gel of a dehydration condensation reaction product of silicone oil and boric acid, wherein the boric acid is in an amount of 25 to 75 moles based on 100 moles of the total amount of the silicone oil and the boric acid.

There are provided optical bonding particles capable of improving the visibility and controlling gaps with high accuracy. The optical bonding particles according to the present invention include silicone particles and coating particles or a coating layer disposed on the surface of the silicone particles, and in the optical bonding particles, the absolute value of the difference between the refractive index of the silicone particles and the refractive index of the coating particles or the refractive index of the coating layer is 0.03 or less.

A process for producing alkyl silicone resins (A) containing at least 80 wt % of units of the general formula (I), R.sup.1.sub.a(R.sup.2O).sub.b(HO).sub.dR.sup.3.sub.cSiO.sub.(4-a-b-c-d)/2 (I), is provided. Alkylalkoxysilane (A1) of the general formula (II), R.sup.1.sub.aR.sup.3.sub.cSi(OR.sup.2).sub.(4-a-c) (II), is mixed in a first reaction step (R1), alternatively, with a pure acid (S) having pK.sub.a of not more than 5, with an at least 5 wt % aqueous solution of an acid (S) having a pK.sub.a of not more than 5 or with a halosilane compound (A2) of the general formula (III), R.sup.1.sub.aR.sup.3.sub.cSi(X).sub.(4-a-c) (III). Subsequently, in at least one further reaction step, (R2) water is added.

A process for producing alkyl silicone resins (A) containing at least 80 wt % of units of the general formula (I), R.sup.1.sub.a(R.sup.2O).sub.b(HO).sub.dR.sup.3.sub.cSiO.sub.(4-a-b-c-d)/2 (I), is provided. Alkylalkoxysilane (A1) of the general formula (II), R.sup.1.sub.aR.sup.3.sub.cSi(OR.sup.2).sub.(4-a-c) (II), is mixed in a first reaction step (R1), alternatively, with a pure acid (S) having pK.sub.a of not more than 5, with an at least 5 wt % aqueous solution of an acid (S) having a pK.sub.a of not more than 5 or with a halosilane compound (A2) of the general formula (III), R.sup.1.sub.aR.sup.3.sub.cSi(X).sub.(4-a-c) (III). Subsequently, in at least one further reaction step, (R2) water is added.

A purification method for a silicon-containing polymer composition capable of reducing metal impurities in a silicon-containing polymer composition to be treated, while suppressing the weight average molecular weight change before and after the treatment, by treating the silicon-containing polymer composition containing the metal impurities with an ion exchange resin having a specific structure; a silicon-containing polymer composition; and a method for producing a semiconductor device. A purification method for a silicon-containing polymer composition reduced in weight average molecular weight change before and after treatment, said method being treating a silicon-containing polymer composition to be treated containing an organic solvent with an gel-type cation exchange resin. The weight average molecular weight change before and after the treatment is 70 or less. The ion exchange resin preferably has a strongly acidic functional group. The total residual amount of 24 metal elements after the ion exchange treatment is 1 ppb or less.

A purification method for a silicon-containing polymer composition capable of reducing metal impurities in a silicon-containing polymer composition to be treated, while suppressing the weight average molecular weight change before and after the treatment, by treating the silicon-containing polymer composition containing the metal impurities with an ion exchange resin having a specific structure; a silicon-containing polymer composition; and a method for producing a semiconductor device. A purification method for a silicon-containing polymer composition reduced in weight average molecular weight change before and after treatment, said method being treating a silicon-containing polymer composition to be treated containing an organic solvent with an gel-type cation exchange resin. The weight average molecular weight change before and after the treatment is 70 or less. The ion exchange resin preferably has a strongly acidic functional group. The total residual amount of 24 metal elements after the ion exchange treatment is 1 ppb or less.

A dihaloorganosilane is represented by the formula (I): Each X independently represents Cl, Br, or I. Each Ar.sup.1 independently represents a phenylene group optionally substituted by 1 to 4 alkyl groups selected from methyl or ethyl. Each R.sup.1 independently represents an alkylene group having from 2 to 18 carbon atoms. Each R.sup.2 independently represents methyl or ethyl. Each R.sup.3 independently represents an alkylene group having from 1 to 18 carbon atoms. Each R.sup.4 independently represents an alkylene group having from 2 to 18 carbon atoms, and n is an integer in a range of 0 to 5, inclusive. Ionic organosilanes preparable from the dihaloorganosilanes are represented by the formula (II): Membrane compositions and membranes containing the ionic organosilanes are also disclosed.

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A method for manufacturing a PDMS device in accordance with an exemplary embodiment of the present invention surface treats the entire surface of a pattern with a thiol group (—SH), so that a hydrogel may be connected to the surface of the pattern by a covalent bond under ultraviolet rays. Therefore, a PDMS device manufactured by the above method has an advantage in that the shape thereof may be stably maintained without the swelling or desorption of a hydrogel even when an electrolyte is filled in a pattern.

The invention is generally related to an insert for being embedded in a silicone hydrogel contact lens. The insert is made of a crosslinked materials which are rigid in dry state at room temperature (from about 22° C. to about 26° C.), have a high oxygen permeability and a high refractive index in fully hydrated state, and can become softer at a temperature great than 32° C. Such materials are useful for making inserts in embedded contact lenses for correcting corneal astigmatism, presbyopia, and color blindness lenses and for imparting photochromic characteristics to the lenses. The invention is also related to a method for making embedded silicone hydrogel contact lenses comprising an insert of the invention therein and to embedded silicone hydrogel contact lenses comprising an insert of the invention therein.

The invention is generally related to an insert for being embedded in a silicone hydrogel contact lens. The insert is made of a crosslinked materials which are rigid in dry state at room temperature (from about 22° C. to about 26° C.), have a high oxygen permeability and a high refractive index in fully hydrated state, and can become softer at a temperature great than 32° C. Such materials are useful for making inserts in embedded contact lenses for correcting corneal astigmatism, presbyopia, and color blindness lenses and for imparting photochromic characteristics to the lenses. The invention is also related to a method for making embedded silicone hydrogel contact lenses comprising an insert of the invention therein and to embedded silicone hydrogel contact lenses comprising an insert of the invention therein.