Adhesive formulations and associated methods and products

Patent metadata

Field	Value
Publication number	US-2021122951-A1
Application number	US-201816634798-A
Country	US
Kind code	A1
Filing date	Aug 1, 2018
Priority date	Aug 1, 2017
Publication date	Apr 29, 2021
Grant date	—

Abstract

Adhesive formulations containing an acrylic polymer system, a solvent, a defoaming agent, an organic amine, an adhesion promoter, a caustic solution, and a processing oil, and associated methods of making adhesive formulations and products are provided herein.

First claim

1 . An adhesive formulation, comprising:
an acrylic polymer system present in an amount from about 50 to about 75 percent, by weight; a solvent present in an amount from about 4 to about 15 percent, by weight; a defoaming agent present in an amount from about 0.1 to about 0.5 percent, by weight; an organic amine present in an amount of from about 0.01 to about 5 percent, by weight; an adhesion promoter present in an amount of from about 0.01 to about 0.5 percent, by weight; a caustic solution present comprising a caustic agent present in water in an amount of from about 30 to about 40 percent, in an amount of from about 3 to about 20 percent, by weight; and a processing oil present in an amount of from about 1 to about 5 percent, by weight.

2 . The adhesive formulation of claim 1 , further comprising a fatty acid in an amount of from about 2 to about 5 percent, by weight.

3 . The adhesive formulation of claim 2 , wherein the fatty acid comprises sodium stearate.

4 . The adhesive formulation of claim 1 , further comprising a colorant in an amount of from about 0.05 to about 1 percent, by weight.

5 . The adhesive formulation of claim 4 , wherein the colorant displays a color during application that disappears upon drying of the formulation.

6 . The adhesive formulation of claim 1 , wherein the solvent comprises deionized water.

7 . The adhesive formulation of claim 1 , wherein the caustic solution comprises sodium hydroxide.

8 . The adhesive formulation of claim 1 , wherein the processing oil comprises glycerin.

9 . A glue stick comprising the adhesive formulation of any claim 1 .

10 . A method of making an adhesive formulation, comprising:
combining an acrylic polymer system, a solvent, and a defoaming agent to form a mixture; heating the mixture to a temperature of from about 70° C. to about 80° C.; adding a fatty acid to the heated mixture; subsequently adding a caustic solution to the heated mixture and mixing until the pH of the mixture is stable after neutralization of the acrylic polymer system; adding a processing oil to the heated mixture; adding an adhesion promoter to the heated mixture; and adding an organic amine to the heated mixture.

11 . The method of claim 10 , wherein the adhesive formulation contains:
the acrylic polymer system in an amount from about 50 to about 75 percent, by weight; the solvent in an amount from about 4 to about 15 percent, by weight; the defoaming agent in an amount from about 0.1 to about 0.5 percent, by weight; the organic amine in an amount of from about 0.01 to about 5 percent, by weight; the adhesion promoter in an amount of from about 0.01 to about 0.5 percent, by weight; the caustic solution comprising a caustic agent present in water in an amount of from about 30 to about 40 percent, in an amount of from about 3 to about 20 percent, by weight; and the processing oil in an amount of from about 1 to about 5 percent, by weight.

12 . The method of claim 10 , wherein the mixing occurs in a double planetary mixing unit comprising a side-wall scraping blade.

Assignees

• Sanford Lp

Inventors

• Foster Van R
• Kreft Joseph Wayne
• Patel Yogeshbhai Babubhai

Classifications

• C09J9/005

  Glue sticks · CPC title

• C08K5/053

  Polyhydroxylic alcohols · CPC title

• C08K5/17

  Amines; Quaternary ammonium compounds · CPC title

• C09J133/08 Primary

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C08K3/22

  of metals · CPC title