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Randomly branched aromatic polycarbonate from triphenol

  • US 4,415,723 A
  • Filed: 03/19/1982
  • Issued: 11/15/1983
  • Est. Priority Date: 03/19/1982
  • Status: Expired due to Term
First Claim
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1. A composition comprising a high molecular weight, thermoplastic randomly branched polycarbonate derived from an aromatic dihydric phenol, a carbonate precursor, and a branching component in an amount sufficient to produce a thermoplastic randomly branched polycarbonate which is substantially free of crosslinking;

  • said randomly branched polycarbonate having an intrinsic viscosity of about 0-3 to 1.0 dl/g in methylene chloride at 25°

    C. wherein the branching component comprises one or more compounds of the formula ##STR3## wherein X1, X2, X3, Y1, Y2, and Y3 are independently selected from the group consisting of hydrogen, chlorine, bromine, lower alkyl of from 1 to 6 carbon atoms;

    R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, lower alkyl of from 1 to 6 carbon atoms; and

    n is an integer of 0, 1, 2, 3, 4, 5 and 6;

    m and r are integers of 0, 1 or 2 with the proviso that the sum of n+m+r is at least 1 and mixtures of said triphenolic compounds.

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