The present invention relates to an onium-functionalized siloxane having the general Formula (X) or (X-A) as defined herein; a method for preparing the onium-functionalized siloxane; and its use as an antimicrobial agent.

The invention relates to copolymers comprising a chain of siloxane repeat units of at least two different types, a first type of siloxane repeat unit comprising at least one OH group on the silicon atom of the siloxane repeat unit and a second type of repeat unit comprising at least one pendant chain on the silicon atom of said repeat unit, this pendant chain consisting of a polymer chain comprising a chain of repeat units carrying at least one group of formula PO.sub.3R.sup.1R.sup.2 wherein R.sup.1 and R.sup.2 independently represent a hydrogen atom, an alkyl group or a cation.

The invention relates to copolymers comprising a chain of siloxane repeat units of at least two different types, a first type of siloxane repeat unit comprising at least one OH group on the silicon atom of the siloxane repeat unit and a second type of repeat unit comprising at least one pendant chain on the silicon atom of said repeat unit, this pendant chain consisting of a polymer chain comprising a chain of repeat units carrying at least one group of formula PO.sub.3R.sup.1R.sup.2 wherein R.sup.1 and R.sup.2 independently represent a hydrogen atom, an alkyl group or a cation.

A fluorinated compound having at least one (meth)acrylate functional group disclosed. A curable composition comprising the fluorinated compound and polyfunctional acrylate, a cured product formed from the curable composition, and method of forming the cured product are also disclosed.

The phosphorylcholine group-containing polysiloxane monomer of the present invention is represented by the formula (1). In the formula, a represents an integer of 20 to 500, b represents an integer of 1 to 70, c represents an integer of 1 to 70, d represents 0 or 1, p and q each represent 0 or 1, X represents CH.sub.2 or CH.sub.2CH.sub.2, and R represents an alkyl group having 2 to 18 carbon atoms. The present invention provides the phosphorylcholine group-containing polysiloxane monomer which gives, when copolymerized with a polymerizable monomer such as methacrylic acid or a hydrophilic monomer other than methacrylic acid, a polymer that exhibits surface hydrophilicity and sufficient stability as ophthalmic devices.

The phosphorylcholine group-containing polysiloxane monomer of the present invention is represented by the formula (1). In the formula, a represents an integer of 20 to 500, b represents an integer of 1 to 70, c represents an integer of 1 to 70, d represents 0 or 1, p and q each represent 0 or 1, X represents CH.sub.2 or CH.sub.2CH.sub.2, and R represents an alkyl group having 2 to 18 carbon atoms. The present invention provides the phosphorylcholine group-containing polysiloxane monomer which gives, when copolymerized with a polymerizable monomer such as methacrylic acid or a hydrophilic monomer other than methacrylic acid, a polymer that exhibits surface hydrophilicity and sufficient stability as ophthalmic devices.

The present invention is a compound of Formula I where R.sup.1-R.sup.4, m, and n, are defined herein. The compound of the present invention is useful as a photoinitiator that is soluble in an ethylenically unsaturated organopolysiloxane.

The present invention is a compound of Formula I where R.sup.1-R.sup.4, m, and n, are defined herein. The compound of the present invention is useful as a photoinitiator that is soluble in an ethylenically unsaturated organopolysiloxane.

This photoreactive organopolysiloxane has a structural unit ratio represented by formula (1), contains 1-90 mass % of a group having a photopolymerization initiation site, has excellent compatibility to polymerizable organic compounds such as an acrylate compound, and has a photopolymerization initiation site capable of providing photocurability even in atmospheric air.

(R.sup.1.sub.3SiO.sub.1/2).sub.a(R.sup.1.sub.2SiO.sub.2/2).sub.b(R.sup.1SiO.sub.3/2).sub.c(SiO.sub.4/2).sub.d(1)

(In the formula, each R.sup.1 independently represents an alkyl group or an aryl group optionally having a substituent group and respectively including 1-20 carbon atoms or 6-20 carbon atoms, or a group having a photopolymerization initiation site, a represents a number of 0.1-0.8, b represents a number of 0-0.5, c represents a number of 0-0.5, and d represents a number of 0.2-0.9, and a+b+c+d=1 is satisfied.)

This photoreactive organopolysiloxane has a structural unit ratio represented by formula (1), contains 1-90 mass % of a group having a photopolymerization initiation site, has excellent compatibility to polymerizable organic compounds such as an acrylate compound, and has a photopolymerization initiation site capable of providing photocurability even in atmospheric air.

(R.sup.1.sub.3SiO.sub.1/2).sub.a(R.sup.1.sub.2SiO.sub.2/2).sub.b(R.sup.1SiO.sub.3/2).sub.c(SiO.sub.4/2).sub.d(1)

(In the formula, each R.sup.1 independently represents an alkyl group or an aryl group optionally having a substituent group and respectively including 1-20 carbon atoms or 6-20 carbon atoms, or a group having a photopolymerization initiation site, a represents a number of 0.1-0.8, b represents a number of 0-0.5, c represents a number of 0-0.5, and d represents a number of 0.2-0.9, and a+b+c+d=1 is satisfied.)