Acetoacetoxy-alkyl acrylate-containing pressure sensitive adhesi

Details Acetoacetoxy-alkyl acrylate-containing pressure sensitive adhesi Acetoacetoxy-alkyl acrylate-containing pressure sensitive adhesi

1990-08-30

1993-02-09

Henderson, Christopher

Stock material or miscellaneous articles

Composite

Of polyester

428442, 428463, 4284763, 428520, B32B 2706, B32B 2736

Patent

active

051852128

ABSTRACT:
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.

REFERENCES:
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patent: 3459790 (1969-08-01), Smith
patent: 3488708 (1970-01-01), Smith
patent: 3554987 (1971-01-01), Smith
patent: 3607834 (1971-09-01), Marx
patent: 3658878 (1972-04-01), Smith
patent: 3900674 (1975-08-01), Coffman
patent: 3928697 (1975-12-01), Mallinson
patent: 4296226 (1981-10-01), Braun
patent: 4408018 (1983-10-01), Bartman
patent: 4421889 (1988-12-01), Braun et al.
patent: 4759983 (1988-07-01), Knutson et al.
U.S. patent application Ser. No. 07/610,297, Pressure Sensitive Adhesives, Knutson, Steinwand, Spada, and Wilcynski.
D. A. Upson, "Journal of Polymer Science: Polymer Symposium," John Wiley and Sons, Inc., 1985, 72, (pp. 45-54).

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