Adhesive for insulative articles

Patent metadata

Field	Value
Publication number	US-10099459-B2
Application number	US-201715816052-A
Country	US
Kind code	B2
Filing date	Nov 17, 2017
Priority date	Nov 27, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

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.

First claim

The invention claimed is:

1. An insulated package comprising:
(a) a substrate; and
(b) a waterborne-based adhesive comprising (1) a water-based polymer prepared by emulsion polymerization; (2) a plurality of expandable microspheres having a hydrocarbon core and a polyacrylonitrile shell; and (3) optionally, an additive;
wherein the water-based polymer is selected from the group consisting of emulsion-based polymer selected from the group consisting of vinyl acetate ethylene dispersion, polyvinyl acetate, polyvinyl acetate polyvinyl alcohol, dextrin stabilized polyvinyl acetate, polyvinyl acetate copolymers, vinyl acetate—ethylene copolymers, vinylacrylic, styrene acrylic, acrylic, styrene butyl rubber, polyurethane and mixtures thereof.

2. The insulated package of claim 1 , wherein the expandable microspheres begin to expand at a temperature of about 80° C. to about 100° C.

3. The insulated package of claim 1 , wherein the expandable microspheres have a maximum expansion temperature of about 120° C. to about 130° C.

4. The insulated package of claim 1 , wherein the additive is selected from the group consisting of tackifiers, plasticizers, crosslinker, and mixtures thereof.

5. The insulated package of claim 1 , wherein the crosslinker is selected from the group consisting of aluminum nitrate, zirconium acetate, ammonium zirconyl carbonate and mixtures thereof.

6. The insulated package of claim 1 , further comprising a defoamer, preservative, surfactant, rheology modifier, filler, pigment, dye, stabilizer, polyvinyl alcohol, humectant, and mixtures thereof.

7. The insulated package of claim 1 , wherein the substrate is a reduced weight basis substrate.

8. The insulated package of claim 1 , wherein the substrate is a fiberboard, corrugated board, solid bleached boards, kraft paper or coated paper.

9. The insulated package of claim 1 , which is a cup, food container, case, carton, bag, box, lids, envelope, wrap or clamshell.

10. The insulated package of claim 1 , wherein the adhesive further comprises an accelerator that is a multivalent water-soluble salt.

11. The insulated package of claim 10 , wherein the multivalent water-soluble salt is selected from the group consisting of aluminum nitrate, zirconium acetate, ammonium zirconyl carbonate and mixtures thereof.

Assignees

• Henkel IP & Holding GmbH

Inventors

• Huang Tianjian
• Thompson Kristina
• Waski Daniel
• Getty Kris

Classifications

• B32B2439/00

  Containers; Receptacles · CPC title

• C09J131/04 Primary

  Homopolymers or copolymers of vinyl acetate · CPC title

• B32B2255/08

  on wood layer · CPC title

• B32B29/002 Primary

  as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10) · CPC title

• B32B21/04

  comprising wood as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/042; next to a bituminous or tarry layer B32B11/042; next to a water setting substance layer B32B13/10; next to a metal layer B32B15/10; next to a glass layer B32B17/062; next to a layer formed of natural mineral fibres or particles B32B19/042; next to a cellulosic plastic layer B32B23/044)} · CPC title