A multifunctional crosslinking agent includes one or more repeating units of a siloxanyl group or a silyl-alkyl-siloxanyl group, and at least two ethylenically unsaturated reactive end groups. One of the at least two ethylenically unsaturated reactive end groups is a (meth)acrylate-containing reactive end group or an acrylamide-containing reactive end group and the other one is an allyl-containing reactive end group or a vinyl-containing reactive end group. Ophthalmic devices are formed from a polymerization product of a monomeric mixture containing one or more of the multifunctional crosslinking agents, one or more first ophthalmic device-forming comonomers having at least one reactive group that preferentially reacts with the (meth)acrylate-containing reactive end group or the acrylamide-containing reactive end group of the multifunctional crosslinking agent, and one or more second ophthalmic device-forming comonomers having at least one reactive group that preferentially reacts with the allyl-containing reactive end group or the vinyl-containing reactive end group of the multifunctional crosslinking agent.

The present disclosure is directed to a process for the preparation of curable, (meth)acrylate functionalized polysiloxanes. In addition, the present disclosure is directed to a curable, (meth)acrylate-functionalized polysiloxane obtained thereby and curable compositions comprising these curable, (meth)acrylate-functionalized polysiloxanes.

The present disclosure is directed to a process for the preparation of curable, (meth)acrylate functionalized polysiloxanes. In addition, the present disclosure is directed to a curable, (meth)acrylate-functionalized polysiloxane obtained thereby and curable compositions comprising these curable, (meth)acrylate-functionalized polysiloxanes.

The purpose of the present invention is to provide a weather-resistant hard coat composition for a glass-substitute substrate capable of efficiently forming a coating film excelling in weather resistance, scratch resistance, and toughness. The present invention provides: a weather-resistant hard coat composition for a glass-substitute substrate, the composition containing a polyorganosilsesquioxane having a constituent unit represented by Formula (1); a cured product thereof; and a laminate having a glass-substitute substrate and a coating film formed on at least one surface of the glass-substitute substrate. The coating film is a layer of a cured product of the weather-resistant hard coat composition for a glass-substitute substrate. [In formula (1), R.sup.1 represents a group containing an active energy ray-curable functional group.]

The purpose of the present invention is to provide a weather-resistant hard coat composition for a glass-substitute substrate capable of efficiently forming a coating film excelling in weather resistance, scratch resistance, and toughness. The present invention provides: a weather-resistant hard coat composition for a glass-substitute substrate, the composition containing a polyorganosilsesquioxane having a constituent unit represented by Formula (1); a cured product thereof; and a laminate having a glass-substitute substrate and a coating film formed on at least one surface of the glass-substitute substrate. The coating film is a layer of a cured product of the weather-resistant hard coat composition for a glass-substitute substrate. [In formula (1), R.sup.1 represents a group containing an active energy ray-curable functional group.]

The purpose of the present invention is to provide a weather-resistant hard coat composition for a metal, the composition being capable of efficiently forming a coating film excelling in weather resistance, scratch resistance, and flexibility. The present invention provides: a weather-resistant hard coat composition for a metal, the composition containing a polyorganosilsesquioxane having a constituent unit represented by Formula (1); a cured product thereof; and a coated metal substrate having a metal substrate and a coating film formed on at least one surface of the metal substrate. The coating film is a layer of a cured product of the weather-resistant hard coat composition for a metal. [In Formula (1), R.sup.1 represents a group containing an active energy ray-curable functional group.]

[R.sup.1SiO.sub.3/2]  (1)

The purpose of the present invention is to provide a weather-resistant hard coat composition for a metal, the composition being capable of efficiently forming a coating film excelling in weather resistance, scratch resistance, and flexibility. The present invention provides: a weather-resistant hard coat composition for a metal, the composition containing a polyorganosilsesquioxane having a constituent unit represented by Formula (1); a cured product thereof; and a coated metal substrate having a metal substrate and a coating film formed on at least one surface of the metal substrate. The coating film is a layer of a cured product of the weather-resistant hard coat composition for a metal. [In Formula (1), R.sup.1 represents a group containing an active energy ray-curable functional group.]

[R.sup.1SiO.sub.3/2]  (1)

An organopolysiloxane compound represented by average structural formula (1) is capable of imparting an electron beam curable resin with high antistatic properties, while having excellent antistatic performance durability.

##STR00001##

(In the formula, Z represents a single bond or a group having a functionality of 2-20 and containing an organopolysiloxane structure; R.sup.1 represents a single bond, or an unsubstituted or substituted alkylene group having 1-20 carbon atoms; each of R.sup.2 and R.sup.3 represents an unsubstituted or substituted alkyl group having 1-10 carbon atoms, or the like; Y represents a monovalent hydrocarbon group having a polymerizable reactive group; each of p and q represents a number of 1-10, with (p+q) being 2-20 in accordance with the valence of Z; and in cases where Z represents a single bond, p and q represent 1, A.sup.− represents an anion and Q.sup.+ represents a cationic group that is represented by one of formulae (2)-(4)

##STR00002##

(wherein each one of R.sup.4-R.sup.10 represents an alkyl group having 1-20 carbon atoms, or the like; each one of R.sup.11-R.sup.13 represents a hydrogen atom or the like; and * represents a bonding hand).)

An organopolysiloxane compound represented by average structural formula (1) is capable of imparting an electron beam curable resin with high antistatic properties, while having excellent antistatic performance durability.

##STR00001##

(In the formula, Z represents a single bond or a group having a functionality of 2-20 and containing an organopolysiloxane structure; R.sup.1 represents a single bond, or an unsubstituted or substituted alkylene group having 1-20 carbon atoms; each of R.sup.2 and R.sup.3 represents an unsubstituted or substituted alkyl group having 1-10 carbon atoms, or the like; Y represents a monovalent hydrocarbon group having a polymerizable reactive group; each of p and q represents a number of 1-10, with (p+q) being 2-20 in accordance with the valence of Z; and in cases where Z represents a single bond, p and q represent 1, A.sup.− represents an anion and Q.sup.+ represents a cationic group that is represented by one of formulae (2)-(4)

##STR00002##

(wherein each one of R.sup.4-R.sup.10 represents an alkyl group having 1-20 carbon atoms, or the like; each one of R.sup.11-R.sup.13 represents a hydrogen atom or the like; and * represents a bonding hand).)

This composition does not contain a non-crosslinkable organopolysiloxane resin but contains: (A) an organopolysiloxane having, per molecule, two groups each represented by formula (1)

##STR00001##

(R.sup.1 represents a C.sub.1-20 monovalent hydrocarbon group, R.sup.2 represents an oxygen atom or the like, R.sup.3 represents an acryloyloxyalkyl group or the like, and p and a respectively represent numbers satisfying 0-10 and 1-3); (B) a monofunctional(meth)acrylate compound not including a siloxane structure; (C) an organopolysiloxane resin which comprises a unit (a) represented by formula (2)

##STR00002##

(R.sup.1, R.sup.2, R.sup.3, a, and p are identical to those described above), a R.sup.4.sub.3SiO.sub.1/2 unit (b) (in the formula, R.sup.4 represents a monovalent hydrocarbon group having 1-10 carbon atoms), and a SiO.sub.4/2 unit (c), and in which the mole ratio of the total of units (a) and (b) to unit (c) is in a range of 0.4 to 1.2:1; and (D) a photoinitiator.

Said composition provides a cured product having excellent elastic modulus and adhesiveness when used as a temporary fixing material.