Articles coated with pressure-sensitive interpolymers containing 2-acrylamido-2-methylpropanesulfonic acid

• US 4,012,560 A
• Filed: 11/03/1975
• Issued: 03/15/1977
• Est. Priority Date: 05/31/1974
• Status: Expired due to Term

• Current Assignee: Monsanto Company (Bayer AG)
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Baatz, James C., Corey, Albert E.
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Kulkosky, Peter F.
• Application Number:
  US05/628,005
• Time in Patent Office: 498 Days
• Field of Search: 427/207 B, 428/335, 428/514, 428/521, 428/516, 428/474, 428/261, 260/29.6 SQ, 260/79.3 MU
• US Class Current: 428/475.2
• CPC Class Codes: C08F 220/16 of phenols or of alcohols containing two or more carbon atoms
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/31736 Next to polyester
• CPC Class Codes: Y10T 428/31743 Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31746 Polymer of monoethylenically unsaturated hydrocarbon
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31895 Paper or wood
• CPC Class Codes: Y10T 428/31906 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/3192 Next to vinyl or vinylidene chloride polymer

Abstract

Acrylic pressure-sensitive resins comprising at least one ester of acrylic acid or methacrylic acid containing from 6 to 20 carbon atoms and between 0.1 and 1.5 weight percent of 2-acrylamido-2-methylpropanesulfonic acid. The resins are prepared in aqueous emulsion and when coated on substrates and dried provide pressure-sensitive films with superior peel strength retention.

Claims

1. An article of manufacture comprising a substrate coated on at least one side with a pressure-sensitive interpolymer comprising:

A. from 0.1 to 1.5 weight percent of 2-acrylamido-2-methylpropanesulfonic acid, and

B. at least one monomer selected from the group consisting of esters of acrylic acid and methacrylic acid containing from 6 to 20 carbon atoms, alone, or with

C. a monomer selected from the group consisting of alpha-olefins containing from 2 to 10 carbon atoms, vinyl esters of alkanoic acids containing from 3 to 10 carbon atoms, ethyl and methyl esters of acrylic and methacrylic acids, acrylonitrile, methacrylonitrile, styrene, vinyl toluene, and vinyl chloride,

wherein the interpolymer has a weight average molecular weight in the range 10,000 to 1,000,000 and a glass transition temperature in the range of -15°

to -75°

C.

2. The article of manufacture of claim 1 wherein the Group B comonomer is selected from the group consisting of isobutyl acrylate, 2-ethylhexyl acrylate and 2-ethylhexyl methacrylate.

3. The article of manufacture of claim 1 wherein the Group C monomer is vinyl acetate, methyl acrylate, or ethyl acrylate.

4. The article of manufacture of claim 1 wherein the interpolymer contains from 0.25 to 1 weight percent of 2-acrylamido-2-methylpropanesulfonic acid.

5. The article of manufacture of claim 1 wherein the interpolymer has a molecular weight between 50,000 and 700,000.

6. The article of manufacture of claim 1 wherein the substrate is a tape.

7. The article of manufacture of claim 1 wherein the substrate is a sheet.

8. The article of manufacture of claim 1 wherein the substrate is selected from the group consisting of plasticized polyvinyl chloride, Mylar, cellulose acetate, nylon, polyethylene, polypropylene, and paper.