Polymer-bound bisacylphosphine oxides

An oligomer or polymer substituted by one or more bisacylphosphine oxide moieties, wherein the bisacylphosphine oxide moieties are linked via the phosphorous atom, optionally via a spacer group, to the oligomer or polymer backbone, which oligomer or polymer comprises units of formula (Ia),

• where
• m is an integer equal or greater than 2;
• y and z independently of each other are an integer 0-15000;
• A is
• wherein the asterisk denotes the bond to X;
• B1 and B2 independently of each other are
• wherein A, B1 and B2 are incorporated into the same polymer backbone via random or block polymerization;
• X is a direct bond, C1-C10-alkylene, —(CH2)o—NH—CO—O—(CH2)p—*,
• —(CH2)o—NH—CO—O—CH2—CHOH—CH2—*, —(CH2)o—NH—CO—NH—(CH2)p—*,
• —(CH2)o—NH—CO—S—(CH2)p—*, —(CH2)o—O—CO—CHR3—CH2—NH—(CH2)p—*, *—(CH2)o—O—CO—CHR3—CH2—NH—(CH2)p—, —(CH2)o—CO—O—(CH2)p—*,
• —(CH2)o—O—CO—CHR3—CH2—S—(CH2)p—*,
• *—(CH2)o—O—CO—CHR3—CH2—S—(CH2)p—
• —(CH2)o—O—CO—CH(COCH3)—CH2—C(COOR3)CH2—*,
• —(CH2)o—NH—CH2—CH2—C(COOR3)CH2—*,
• —(CH2)o—S—(CH2)o—C(COOR3)CH2—*,
• —(CH2)o—O—CO—CH(COCH3)—CH2—CHR3—CO—O—(CH2—CH2—O)t(CO)CH2—*,
• —(CH2)o—NH—CH2—CHR3—CO—O—(CH2—CH2—O)t(CO)CH2—*,
• —(CH)o—S—CH2—CHR3—CO—O—CH2—CH2—*,
• —(CH2)o—S—CH2—CHR3—CO—O—(CH2—CH2—O)t(CO)CH2—*,
• —(CH2)o—NH—CH2—CHR3—CO—O—CH2—CH2—*,
• —(CH2)o—O—CO—CH(COCH3)—CH2—CHR3—CO—O—CH2—CH2—*, —(CH2)o—CO—O—CH2—CHOH—CH2—*,
• —(CH2)o—O(CO)—CH2—*, —(CH2CH2O)t—(CO)—CH2—*, —(CH2)o—CHOH—CH2—O(CO)—CH2—* or
• wherein the asterisk denotes the bond to the bisacylphosphine oxide moiety;
• o, p and q independently of each other are an integer 1-4;
• r is an integer 0-2;
• s is 0 or 1;
• t is an integer 1 or 2;
• R1 is C1-C4-alkyl, C1-C4-alkoxy or Cl;
• and
• R2 is hydrogen, C1-C4-alkyl, C1-C4-alkoxy or Cl;
• R3 is hydrogen or methyl;
• R4 is C1-C4alkyl;
• R5 is methyl, phenyl or ethoxy;
• R6 is C1-C10alkyl or C1-C9perfluoroalkyl;
• R7 is C1-C10alkyl, —CH2—O—C1-C10alkyl, —CH2—O—(CH2)o—C5-C8cycloalkyl,
• —CH2—O—(CH2)o—C6-C10aryl, C1-C9perfluoroalkyl, —CH2—O—C1-C10perfluoroalkyl,
• —CH2—O—C6-C10aryl which is unsubstituted or substituted by C1-C4alkyl, C1-C4alkoxy or by Cl;
• R8 is hydrogen, C1-C8alkyl, (CO)O —R15 or CN;
• R9 is hydrogen, (CO)O—R15;
• or R8 and R9 are together —(CH2)w—, —CH═CH—CH2—, —(CO)—O—(CO)—, —(CO)—N(R16)—CO— or
• R10 is hydrogen, C1-C8-alkyl or —SO3−E+;
• R11 is hydrogen;
• or R10 and R11 together are —O—CH2CH2—O—;
• R12 and R13 independently of each other are C1-C4-alkyl, vinyl, phenyl or C1-C4alkoxy;
• R14 is hydrogen, CH2Br, CH2Cl or I;
• R15 is hydrogen, C1-C4-alkyl or benzyl;
• R16 is C1-C4alkyl or phenyl;
• w is an integer 3-10;
• E is a cation;
• and
• Z is CH2 or O.