Patent EP-0296850-A2 (EP)
Inventor: HIMORI SHUNICHI
IPC: C08F293/00
Filed: 1988-06-23
Abstract: An AB-type block copolymer represented by the following formula (I):
      wherein R¹ represents a hydrocarbon group having 1 to 10 carbon atoms; R² represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; R³ represents a benzyl group,
      (wherein R⁴ represents an alkyl group having 1 to 18 carbon atoms) or an alkyl group having 1 to 18 carbon atoms; M represents a group represented by the formula (M²) m -(M¹) n  or (M¹) m -(M²) n , each of  m  and  n  being a natural number of 20 to 5000; M¹ represents a (meth)acrylate residue represented by the formula:
      (wherein R⁵ represents a hydrogen atom or a methyl group, and R⁶ represents a hydrocarbon group having 1 to 18 carbon atoms) or an aromatic vinyl residue represented by the formula:  
      (wherein R⁷ represents a hydrogen atom or a methyl group, R⁸ represents a phenyl group, a halogenated phenyl group or an alkylphenyl group) or a fatty acid vinyl ester residue represented by the formula:
      (wherein R⁹ represents a hydrocarbon group having 1 to 18 carbon atoms); M² represents a hydrophilic group-­containing vinyl residue represented by any one of the formulae (II) to (XII):
      wherein R¹⁰, R¹¹ each represent a hydrogen atom, a methyl or a hydroxyl group, and Z represents a hydrogen atom, an alkali metal atom, ammonium or an organic amine;  
      wherein R¹⁰ and Z have the same meanings as in the formula (II), and R¹² represents an alkylene group having 1 to 10 carbon atoms;
      wherein R¹⁰, R¹¹ and Z have the same meanings as in the formula (II), and R¹² has the same meaning as in the formula (III);
      wherein R¹⁰ and R¹¹ have the same meanings as in the formula (II), R¹³ and R¹⁴ each represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a sulfonated alkyl group represented by the formula -   R¹²SO₃Z (wherein R¹² and Z have the same meanings as in the formula (III));
      wherein R¹⁰, R¹¹ and R¹² have the same meanings as in the formula (IV), and R¹³ and R¹⁴ have the same meanings as in the formula (V);
      wherein R¹⁰, R¹¹, R¹², R¹³ and R¹⁴ have the same meanings as in the formula (VI), and R¹⁵ represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a sulfonated alkyl group represented by the formula - R¹²SO₃Z (wherein R¹² and Z have the same meanings as in the formula (III));
        wherein R¹⁶ represents a hydroxylated alkyl group having 1 to 18 carbon atoms and having at least one hydroxyl group, and R¹⁰ and R¹¹ have the same meanings as in the formula (II);
      wherein R¹⁰ and R¹¹ have the same meanings as in the formula (II), and R¹⁷ represents a polyethylene glycol group or a polypropylene glycol group represented by the formula
      (wherein ℓ represents a natural number of 1 to 10 and X represents an alkyl group having 1 to 10 carbon atoms or Z, -PO₃H₂, -PO₃HZ or -PO₃Z₂ (wherein Z has the same meaning as in the formula (II)).
      wherein R¹⁰ and Z have the same meanings as in the formula (II);  
      wherein R¹⁰ has the same meaning as in the formula (II); or
      wherein R¹⁰, R¹¹ and Z have the same meanings as in the formula (II); and M² further represents a vinylpyrrolidone residue or an ammonium salt of the formula (V), (VI) or (VII).