Wet glue

Patent metadata

Field	Value
Publication number	US-9670389-B2
Application number	US-201615170276-A
Country	US
Kind code	B2
Filing date	Jun 1, 2016
Priority date	Jun 28, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

An aqueous adhesive composition including a certain emulsion polymer and an epoxysilane wherein the adhesive composition is substantially free from crosslinking agent is provided. A method for providing a substrate bearing a paper label, the adhered label having ice water resistance, and a method for removing the paper label from the substrate are also provided.

First claim

What is claimed is:

1. A method for providing a substrate bearing a removable paper label, the method comprising:
forming an aqueous adhesive composition substantially free from crosslinking agent, the adhesive composition comprising:
an emulsion polymer comprising, as copolymerized units, from 10% to 35%, by weight based on the emulsion polymer weight, carboxylic acid monomer and at least one second ethylenically unsaturated monomer; and from 0.1% to 4%, by weight based on the emulsion polymer dry weight, an epoxysilane;

applying the aqueous adhesive composition to a paper label;
drying or allowing to dry the applied adhesive composition on the paper label, thereby forming the removable paper label; and
applying the removable paper label to the substrate.

2. The method of claim 1 , wherein drying or allowing to dry the applied adhesive composition is effected under ambient conditions.

3. The method of claim 1 , wherein drying or allowing to dry the applied adhesive composition is effected at 0° C. to 35° C.

4. The method of claim 1 , wherein the epoxysilane is present in the adhesive composition from 1.5% to 3.0%, by weight based on the emulsion polymer dry weight.

5. The method of claim 1 , wherein the epoxysilane is a glycidoxyalkyl trimethoxy silane.

6. The method of claim 1 , wherein the emulsion polymer is an alkali-swellable polymer.

7. The method of claim 1 , wherein the carboxylic acid monomer is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, itaconic acid, fumaric acid, maleic acid, monomethyl itaconate, monomethyl fumarate, monobutyl fumarate, maleic anhydride, and combinations of two or more thereof.

8. The method of claim 1 , wherein the at least one second monoethylenically unsaturated monomer is selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, ureido-functional (meth)acrylates, acetoacetates, acetamides or cyanoacetates of (meth)acrylic acid, styrene or substituted styrenes, vinyl toluene, butadiene, vinyl acetate or other vinyl esters, vinyl chloride, vinylidene chloride, N-vinyl pyrollidone, (meth)acrylonitrile, N-alkylol (meth)acrylamide, and combinations of two or more thereof.

9. The method of claim 1 , wherein the adhesive composition further comprises at least one multiethylenically unsaturated monomer selected from the group consisting of allyl (meth)acrylate, diallyl phthalate, butadiene, 1,4-butylene glycol di(meth)acrylate, 1,2-ethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, divinyl benzene, and combinations of two or more thereof.

Assignees

• Rohm & Haas

Inventors

• Cisowski Natacha
• Uhl Isabelle

Classifications

• B32B43/006

  Delaminating · CPC title

• C09J133/08 Primary

  Homopolymers or copolymers of acrylic acid esters · CPC title

• B32B37/1284 Primary

  Application of adhesive · CPC title

• B32B38/10

  Removing layers, or parts of layers, mechanically or chemically · CPC title

• B32B2519/00

  Labels, badges · CPC title