Patent ID: 6734281
Filing Date: 2004-05-11
Classification: C08F,C08G,G02B

Abstract:
An oligomer of formula wherein X4 is â€”SH, â€”NHR1, carboxy or a carboxy derivative, (alk) is C2-C12-alkylene,B and Bâ€² are each independently of the other a 1,2-ethylene radical derivable from a copolymerizable vinyl monomer that is substituted by a hydrophilic substituent by replacing the vinylic double bond by a single bond, Bâ€³ is a 1,2-ethylene radical derivable from a copolymerizable vinyl monomer by replacing the vinylic double bond by a single bond, provided that â€ƒare different, p and q are each independently of another an integer from 1 to 150, wherein the total of (p+q) is an integer from 2 to 150, u is an integer from 1 to 4, T is a monovalent group that is suitable to act as a polymerization chain-reaction terminator, R11 is C1-C8-alkylene; or is a radical of formula â€”C(O)â€”X3-Alk-,â€ƒâ€ƒ(8a), â€”C(O)â€”O-Alkâ€²-NHâ€”C(O)â€”Oâ€”(CH2CH2O)gâ€”CH2CH2â€”â€ƒâ€ƒ(8b), orâ€”C(O)â€”O-Alkâ€²-NHâ€”C(O)â€”Oâ€”G1â€”â€ƒâ€ƒ(8c), wherein Alk is C2-C12-alkylene which is unsubstituted or substituted by hydroxy or a radical â€”N(R12)3+Anâ€”, R12 is hydrogen or C1-C4-alkyl, Anâˆ’ is an anion, Alkâ€² is C2-C12-alkylene, X3 is â€”Oâ€” or â€”NR13â€”, R13 is hydrogen or C1-C4-alkyl, g is an integer from 1 to 23, G1 is the radical of a saccharide reduced by one hydroxy group,t is an integer of 0 or 1, and X is a group â€”Oâ€”, â€”Sâ€”, â€”NR13â€²â€” or â€”N(R13â€²)2+â€”Anâˆ’ wherein R13â€² is hydrogen or C1-C4-alkyl and Anâˆ’ is an anion.