Rohm and Haas Company

Union Oil Company of California

Union Oil of California

Joseph J Wilczynski

Lon T Spada

Lonnie T Spada

Robert Mitchell Blankenship

Alexander Kowalski

Gaylen M Knutson

Paul J Steinwand

Chuen-Shyong Chou

Cheun-Shyong Chou

Normally tacky, pressure sensitive adhesive compositions comprise one or more polymers containing pendant functional groups attached to a polymer backbone and having the formula: ##STR1## in which R.sub.1 is a divalent organic radical at least 3 atoms in length, and X is organoacyl or cyano, and wherein said polymer is selected from the group consisting of

Methods of using pressure-sensitive adhesives

Normally tacky, pressure sensitive adhesive compositions comprise one or more polymers having a T.sub.g of about 0.degree. C. or less containing at least about 40 weight percent polymerized, olefinically unsaturated carboxylic acid ester monomers and pendant functional groups attached to a polymer backbone and having the formula: ##STR1## in which R.sub.1 is a divalent organic radical at least 3 atoms in length, and X is organoacyl or cyano. Such polymers have markedly improved cohesive strength (shear holding value) with little or no detriment to adhesive tack or adhesion (peel resistnace), and these improvements are realized without the necessity of incorporating cross-linking monomers such as N-methylolamides or other cross-linking agents. Pressure sensitive adhesive, water-based emulsions containing such polymers and adhesive articles having at least a portion of one surface thereof coated with such adhesives are also provided.

Acetoacetoxy-alkyl acrylate-containing pressure sensitive adhesives

There are disclosed normally tacky, pressure-sensitive adhesive compositions comprising one or more normally tacky polymers having a T.sub.g of about 0.degree. C. or less and containing pendant functional groups attached to the backbone and having the formula: ##STR1## in which R.sub.1 is a divalent organic radical at least 3 atoms in length, and X is organoacyl or cyano, the polymers preferably also being normally tacky when cured. Such polymers have markedly improved cohesive strength (shear holding value) with little or no detriment to adhesive tack or adhesion (peel resistance), and these improvements are realized without the necessity of incorporating cross-linking monomers such as N-methylolamides or other cross-linking agents. Pressure-sensitive adhesive, water-based emulsions containing such polymers and pressure-sensitive adhesive articles comprising a substrate having at least a portion of one surface thereof coated with the adhesive compositions are also disclosed. In a preferred embodiment, the adhesive compositions further include a polyacid component for further improving cohesive strength, particularly at acidic pH.

Pressure sensitive adhesives of acetoacetoxy-alkyl acrylate polymers

Pressure sensitive adhesives and manufactured articles

There are disclosed normally tacky, pressure-sensitive adhesive compositions comprising one or more normally tacky polymers having a T.sub.g of about 0.degree. C. or less and containing (a) at least about 40 weight percent of at least one polymerized olefinically unsaturated carboxylic acid ester monomer in the polymer backbone and (b) pendant functional groups attached to the backbone and having the formula: ##STR1## wherein R.sub.1 is (i) a covalent bond which directly connects the carbonyl carbon atom of the --CHO group to a carbon atom in the backbone of the polymer or (ii) a divalent organic radical comprising a carbon atom which directly adjoins the carbonyl carbon atom of the --CHO group, the polymers also being normally tacky when cured. Such polymers have improved cohesive strength (shear holding value) with little or no detriment to adhesive tack or adhesion (peel resistance), and these improvements are realized without the necessity of incorporating crosslinking monomers such as N-methylolamides or other crosslinking agents. Pressure-sensitive adhesive, water-based emulsions containing such polymers and pressure-sensitive adhesive articles comprising a substrate having at least a portion of one surface thereof coated with the adhesive compositions are also disclosed.

Method for preparing pressure-sensitive adhesive articles

Binder, coating, and adhesive compositions having surprising film build, flow, leveling, and adhesive wet tack are provided by an aqueous dispersion comprising polymer particles having a central core surrounded by lobes. Also disclosed are the uses and process of preparation of these unique particles.

Multilobals

Binder, coating, and adhesive compositions having surprising film build, flow, leveling, and adhesive wet tack are provided by an aqueous dispersion comprising polymer particles having a central core surrounded by lobes. Also disclsoed are the uses and process of preparation of these unique particles.

Growing community of inventors

Yorba Linda, CA, United States of America

Joseph J Wilczynski