Chain-extended polysiloxane crosslinkers with dangling hydrophilic polymer chains

A linear chain-extended polysiloxane crosslinker, comprising:

• (1) two terminal ethylenically unsaturated groups;
• (2) at least two polysiloxane segments;
• and
• (3) at least one dangling hydrophilic polymer chain covalently attached to a divalent organic radical separating said at least two polysiloxane segments,
• wherein the linear chain extended polysiloxane crosslinker is as set forth by formula (I)
• in which
• D0, D1, D2 and D3 independently of one other are a divalent group of formula (II)
• in which G5 is as defined below, A1, A2 A3, and A4 independent of one other are a direct bond, a linear or branched C1-C10 alkylene divalent radical, —(CH(R″)CH2O)r1—CH(R″)CH2— in which R″ is H or methyl and r1 is an integer of 1 to 20, or a C1-C7 alkyleneoxy C1-C7 alkylene divalent radical, R1, R2, R3, R4, R5, R6, R7, R8, R1′, R2′, R3′, R4′, R5′, R6′, R7′, and R8′ independently of one another are C1-C8-alkyl, C1-C4 alkyl-substituted phenyl, C1-C4-alkoxy-substituted phenyl, fluoro(C1-C18-alkyl), or -alk-(OCH2CH2)n—OR9 in which “alk” is C1-C6-alkylene divalent radical, R9 is C1-C6 alkyl and n is an integer from 1 to 20, a1 is an integer of 0 to 8, m1 and p1 independently of each other are an integer of from 0 to 150, (m1+p1) is from 2 to 150, m2 and p2 independent of each other are an integer of from 0 to 150 and (m2+p2) is from 2 to 150 if a1 is not zero;
• e1, e2, t1, t2, and t3 independent of one other are an integer of 0 or 1;
• υ1, υ2 and υ3 independent of one other are an integer of from 0 to 5 provided that (υ1+υ2+υ3)≧1;
• ω1, ω2 and ω3 independent of one other are an integer of from 0 to 20 provided that (ω1+ω2+ω3) is an integer of 1 to 20;
• L1, L2 and L3 independent of one other is a direct bond,
• in which R12 is hydrogen or C1-C4 alkyl;
• L1′, L2′ and L3′ independent of one other is a direct bond or
• in which R12 is as defined above, Y is —O— or —NR′— in which R′ is hydrogen or C1-C8 alkyl, and Y is linked to T1, T2 or T3;
• G0, G1, G1′, G1″, G2, G2′, G2″, G3, G3′, G3″, G4, and G5 independent of one other are a direct bond or a divalent radical of —Z1—X1—Z2—X2—Z3—X3—Z4—, in which X1, X2, and X3 independent of one other are a linkage selected from the group consisting of a direct bond, —O—, —NR′—, —C(O)—NR′—, —NR′—C(O)—, —O—C(O)—NH—, —NH—C(O)—O—, —NR′—C(O)—NH—, —NH—C(O)—NR′—, —S—, —C(O)—O—, —O—C(O)—, —NH—C(O)—NH—Z0—NH—C(O)—NH—, —O—C(O)—NH—Z0—NH—C(O)—O—, —O—C(O)—NH—Z0—NH—C(O)—NH—, and —NH—C(O)—NH—Z0—NH—C(O)—O—, Z0 is a linear or branched C2-C12 alkylene divalent radical or a C5-C45 cycloaliphatic or aliphatic-cycloaliphatic divalent radical optionally containing therein one or more linkages of —O—, —NR′—, —S— and —C(O)—, R′ is H or C1-C8 alkyl, Z1, Z2, Z3, and Z4 independent of one other are a direct bond, a linear or branched C1-C18 alkylene divalent radical optionally containing therein one or more linkages of —O—, —NR′—, —S— and —C(O)—, a C1-C7 alkyleneoxy C1-C7 alkylene divalent radical, a divalent radical of —(CH(R″)CH2O)r1—CH(R″)CH2— in which R″ and r1 are as defined above, an unsubstituted phenylene divalent radical, C1-C4 alkyl or C1-C4 alkoxy substituted phenylene divalent radical, a C5-C45 cycloaliphatic or aliphatic-cycloaliphatic divalent radical optionally containing therein one or more linkages of —O—, —NR′—, —S— and —C(O)—, a C6-C24 aromatic or araliphatic divalent radical, or combinations thereof;
• R10 and R11 independent of each other are hydrogen or C1-C4 alkyl;
• is a linear or 3-arm hydrophilic polymer chain that comprises at least about 60% by weight of one or more hydrophilic monomeric units;
• and
• T1, T2 and T3 independent of one other are a linear or branched C2-C24 aliphatic trivalent radical, a C5-C30 cycloaliphatic or aliphatic-cycloaliphatic trivalent radical, a C4-C30 aliphatic-heterocyclic trivalent radical including one or more oxygen or nitrogen atoms, or a C3-C24 aromatic or araliphatic trivalent radical.