Adhesive for insulative articles
AssigneeHenkel IP & Holding GmbH
InventorsTianjian Huang, Kristina Thompson, Daniel Waski, Kris Getty
Life of this patent
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Abstract
An adhesive composition that improves structural integrity and insulative properties when applied to a cellulosic substrate is provided. The adhesive composition includes a plurality of microspheres and an emulsion-based polymer that has (i) an elastic modulus greater than 0.5 MPa in the range temperature range of 70° C. to 110° C.; (ii) an absolute log(E)/T slope of less than 0.05 in the range temperature range of 70° C. to 110° C.; and (iii) a tan d value less than 0.6 at 90° C.
Claims20
A waterborne-based adhesive comprising:
- (a) a water-based polymer prepared by emulsion polymerization;
- (b) a plurality of expandable microspheres;
- and
- (c) optionally, an additive;
- wherein the water-based polymer has (i) an elastic modulus greater than 0.5 MPa in the range temperature range of 70° C. to 110° C.;
- (ii) an absolute log(E)/T slope of less than 0.05 in the range temperature range of 70° C. to 110° C.;
- and (iii) a tan d value less than 0.6 at 90° C.
A process for forming an article comprising the steps of:
- (a) preparing a composition comprising:
- (1) a water-based polymer prepared by emulsion polymerization that has (i) an elastic modulus greater than 0.5 MPa in the range temperature range of 70° C. to 110° C.;
- (ii) an absolute log(E)/T slope of less than 0.05 in the range temperature range of 70° C. to 110° C.;
- and (iii) a tan d value less than 0.6 at 90° C.;
- and
- (2) a plurality of expandable microspheres;
- (b) applying the composition onto a substrate, which is a paper, paperboard or wood;
- (c) drying the composition to substantially remove the water;
- and
- (d) expanding the composition.
An article comprising a cellulosic substrate and a composition comprising:
- (a) a water-based polymer prepared by emulsion polymerization that has (i) an elastic modulus greater than 0.5 MPa in the range temperature range of 70° C. to 110° C.;
- (ii) an absolute log(E)/T slope of less than 0.05 in the range temperature range of 70° C. to 110° C.;
- and (iii) a tan d value less than 0.6 at 90° C.;
- and
- (b) a plurality of expandable microspheres.
Dependencies are inferred from the claim text.