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Polymer blends with improved impact resistance

  • US 6,765,062 B2
  • Filed: 07/10/2002
  • Issued: 07/20/2004
  • Est. Priority Date: 08/12/1999
  • Status: Expired due to Fees
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1. A composition comprisingi.) a polymer selected from the group consisting of polyphenylene ether and polystyrene, ii.) at least one other polymer containing amine or carboxylic acid end groups, and iii.) an oligomer, polymer, cooligomer or copolymer prepared by free-radical polymerization of at least one ethylenically unsaturated monomer or oligomer in the presence of a glycidyl-functionalized nitroxyl initiator, wherein the glycidyl-functionalized nitroxyl initiator is of the formula embedded imagewherein R are independently hydrogen, halogen, NO2, cyano, —

  • CONR5R6, —

    (R9)COOR4, —

    C(O)—

    R7, —

    OR8, —

    SR8, —

    NHR8, —

    N(R8)2, carbamoyl, di(C1-C18alkyl)carbamoyl, —

    C(═

    NR5)(NHR6) or R has the same definition as R1;

    R1 are independently unsubstituted C1-C18alkyl, C2-C18alkenyl, C2-C18alkynyl, C7-C9phenylalkyl, C3-C12cycloalkyl or C2-C12heterocycloalkyl;

    or C1-C18alkyl, C2-C18alkenyl, C2-C18 alkynyl, C7-C9phenylalkyl, C3-C12cycloalkyl or C2-C12heterocycloalkyl, which are substituted by NO2, halogen, amino, hydroxy, cyano, carboxy, C1-C4alkoxy, C1-C4alkylthio, C1-C4alkylamino or di(C1-C4alkyl)amino;

    or phenyl, naphthyl, which are unsubstituted or substituted by C1-C4alkyl, C1-C4alkoxy, C1-C4alkylthio, halogen, cyano, hydroxy, carboxy, C1-C4alkylamino or di(C1-C4alkyl)amino;

    R4 is hydrogen, C1-C18alkyl, phenyl, an alkali metal cation or a tetraalkylammonium cation;

    R5 and R6 are hydrogen, C1-C18alkyl, C2-C18alkyl which is substituted by at least one hydroxy group or, taken together, form a C2-C12alkylene bridge or a C2-C12-alkylene bridge interrupted by at least one O or/and NR8 atom;

    R7 is hydrogen, C1-C18alkyl or phenyl;

    R8 is hydrogen, C1-C18alkyl or C2-C18alkyl which is substituted by at least one hydroxy group;

    R9 is C1-C12alkylene or a direct bond;

    or all R1 form together the residue of a polycyclic cycloaliphatic ring system or a polycyclic heterocycloaliphatic ring system with at least one di- or trivalent nitrogen atom;

    R2 are independently of each other phenyl or C1-C6alkyl or two together with the linking carbon atom form a C5-C6cycloalkyl group;

    A is a divalent group which forms a carbocyclic or heterocyclic 5-, 6- or 7-membered ring which may be further substituted; and

    R3 is a radical of formula (II) embedded imageX is phenylene, naphthylene or biphenylene, which are unsubstituted or substituted by NO2, halogen, amino, hydroxy, cyano, carboxy, C1-C4alkoxy, C1-C4alkylthio, C1-C4alkylamino or di(C1-C4alkyl)amino;

    R12 are independently of each other H or CH3;

    D is a group embedded image 

    and m is a number from 1 to 4.

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