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Adhesive composition having improved cutting properties

  • US 5,154,974 A
  • Filed: 09/29/1989
  • Issued: 10/13/1992
  • Est. Priority Date: 06/23/1986
  • Status: Expired due to Term
First Claim
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1. A water emulsion pressure sensitive adhesive exhibiting quick tack and 30 minute peel adhesion sufficient to adhere to a fiber or corrugated container and freedom from adhesive edge flow and undesired slippage comprising:

  • (a) a water dispersible pressure sensitive adhesive acrylic polymer;

    (b) a first surfactant system having at least one surfactant adapted to stabilize a dispersion of said acrylic polymer being selected from the class consisting of cationic, anionic and nonionic surfactants;

    (c) an emulsifiable polydimethylsiloxane in an amount of from about 2 to about 10 percent by weight on the dry basis, based on the weight of acrylic polymer solids, said polydimethylsiloxane having a number average molecular weight in the range of about 1,300 to about 15,000;

    (d) a second surfactant system having at least one surfactant adapted to stabilize an emulsion of said polydimethylsiloxane and being selected from the class consisting of cationic, anionic and nonionic surfactants; and

    (e) water;

    wherein the polydimethylsiloxane is compatible with the acrylic polymer and the surfactant systems,said adhesive emulsion, when coated onto a facing layer and dried, forming a normally tacky essentially pinhole free adhesive film having reduced tendency to flow when cut and about the same quick tack adhesion as the same acrylate adhesive film in which the polydimethylsiloxane is absent.

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