Chemically-resistant adhesives and labels
AssigneeDennison Manufacturing Company
InventorFrank A. Magnotta
Life of this patent
Estimating the term…
Abstract
Chemically-resistant adhesives formed using non-hydrolyzable hard and soft resins. Chemically-resistant labels are provided by using the adhesive to adhere an image-bearing film of polyvinyl chloride to a protective film, and to a carrier. The labels are particularly resistant to acids and have a reduced tendency to shrink or distort when affixed to battery surfaces at elevated temperatures.
Claims12
An acid-resistant label comprising a non-plasticized film of a polyvinyl chloride homopolymer secured at one side to a polypropylene balanced biaxially oriented film and at the opposite side to a substrate by an adhesive, said adhesive comprising a styrene butadiene compolymer binder having a Mooney viscosity index between about 35 and 55, a non-hydrolyzable hard resin tackifier having a softening point in the range from about 80.degree. C. to about 100.degree. C., a non-hydrolyzable soft resin plasticizer having a softening point range of about 5.degree. C. to about 10.degree. C., and a stabilizer, said binder and tackifier being present in a weight ratio in the range from about 1:1 to about 1:1.5, said tackifier and plasticizer being present in a weight ratio in the range from about 6:1 to about 15:1, and said stabilizer being present in a concentration in the range from about 0.5% to about 3% by weight of the binder and tackifier combined.
The label of claim 5 wherein the Mooney viscosity is from about 40 to about 45.
Dependencies are inferred from the claim text.