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Articles comprising aqueous dispersions of polyureaurethanes

  • US 20050033003A1
  • Filed: 11/04/2003
  • Published: 02/10/2005
  • Est. Priority Date: 11/04/2002
  • Status: Active Grant
First Claim
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1. A film prepared from a urea/urethane polymer comprising (a) repeating units derived from a hydroxy-terminated copolymer prepared from tetrahydrofuran and one or both of an alkylene oxide and a cyclic acetal and (b) repeating units derived from a polyisocyanate;

  • wherein the urea/urethane polymer contains less than about 2 mole percent of urea units described by the formula —

    R—

    N(R2)—

    C(O)—

    N(R2)—

    R1 —

    ;

    wherein R is an aromatic hydrocarbon radical, R1 is an aliphatic hydrocarbon radical, and R2 is H or an amide group that is described by the formula —

    C(O)—

    N(R 2)—

    R —

    ; and

    wherein the tetrahydrofuran is described by the formula embedded imagein which any one of the R4s may be a C1 to C4 alkyl radical with the remaining R4s being hydrogen.

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