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Blends of absorbable polyoxaamides

  • US 5,597,579 A
  • Filed: 03/05/1996
  • Issued: 01/28/1997
  • Est. Priority Date: 03/06/1995
  • Status: Expired due to Term
First Claim
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1. An aliphatic polyoxaamides comprising a first divalent repeating unit of formula I:

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    space="preserve" listing-type="equation">[X--C(O)--C(R.sub.1)(R.sub.2)--O--(R.sub.3)--O--C(R.sub.1)(R.sub.2)--C(O)--]Iand a second repeating unit selected from the group of formulas consisting of;

    
    
    space="preserve" listing-type="equation">[--Y--R.sub.17 --].sub.T, II
    
    
    space="preserve" listing-type="equation">[--O--R.sub.5 --C(O)--].sub.B, III
    
    
    space="preserve" listing-type="equation">([--O--R.sub.9 --C(O)].sub.P --O--).sub.L G XIand combinations thereof, wherein X and Y are selected from the group consisting of --O-- and --N(R)--, provided that X and Y cannot both be --O--;

    R, R1 and R2 are independently selected from the group consisting of hydrogen and an alkyl group containing 1 to 8 carbon atoms;

    R3 is selected from the group consisting of an alkylene unit and an oxyalkylene group of the following formula;

    
    
    space="preserve" listing-type="equation">--[(CH.sub.2).sub.C --O--].sub.D --(CH.sub.2).sub.E -- IVwherein C is an integer in the range of from 2 to about 5, D is an integer in the range of from 0 to about 2,000, and E is an integer in the range of from about 2 to about 5, except when D is zero, in which case E will be an integer in the range of from 2 to 12;

    R17 is an alkylene unit containing from 2 to 8 carbon atoms which may have substituted therein an internal ether oxygen, an internal --N(R18)-- or an internal --C(O)--N(R21)--;

    T is an integer in the range of from 1 to 2,000;

    R18 and R21 are independently selected from the group consisting of hydrogen and an alkyl group containing 1 to 8 carbon atoms;

    R5 and R9 are selected from the group consisting of --C(R6)(R7)--, --(CH2)3 --O--, --CH2 --CH2 --O--CH2 --, --CR8 H--CH2 --, --(CH2)4 --, --(CH2)F --O--C(O)-- and --(CH2)K --C(O)--CH2 --;

    R6 and R7 are independently selected from the group consisting of hydrogen and an alkyl containing from 1 to 8 carbon atoms;

    R8 is selected from the group consisting of hydrogen and methyl;

    F and K are independently selected integer in the range of from 2 to 6;

    B is an integer in the range of from 1 to n such that the number average molecular weight of formula III is less than about 200,000;

    P is an integer in the range of from 1 to m such that the number average molecular weight of formula XI is less than about 1,000,000;

    G represents the residue minus from 1 to L hydrogen atoms from the hydroxyl groups of an alcohol previously containing from 1 to about 200 hydroxyl groups; and

    L is an integer from about 1 to about 200.

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