Blends of high Tg polymer emulsions and pressure sensitive adhesive polymer emulsions useful as pressure sensitive adhesives
OwnerFrank Vito Di Stefanoinventor
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Abstract
A pressure sensitive adhesive with a good balance of adhesive and cohesive properties, produced by blending a high Tg polymer emulsion with an aqueous pressure sensitive adhesive polymer emulsion. The high Tg polymer has a Tg of 30° C. to 300° C., a number average particle size (Dn) of 80 to 1000 nm, and a particle size distribution in which less than 25% of the particles are less than 80 nm and less than 25% of the particles are more than 1000 nm.
Claims23
A method for enhancing the adhesive properties of aqueous pressure sensitive adhesive polymer emulsions which comprises blending a high Tg polymer emulsion with an aqueous pressure sensitive adhesive polymer emulsion to form a pressure sensitive adhesive polymer emulsion blend, said high Tg polymer having a Tg of 30° C. to 300° C., a number average particle size of 80 nm to 1000 nm, and a particle size distribution in which less than 10% of the total particles are less than 80 nm, and less than 10% of the total particles are greater than 1000 nm.
A method for enhancing the adhesive properties of aqueous pressure sensitive adhesive polymer emulsions which comprises blending a high Tg polymer emulsion with an aqueous pressure sensitive adhesive polymer emulsion to form a pressure sensitive adhesive polymer emulsion blend, said high Tg polymer having a Tg of 50° C. to 300° C. and a number average particle size of 80 nm to 1000 nm, said aqueous pressure sensitive adhesive polymer emulsion having a number average particle size of less than 500 nm.
An aqueous based pressure sensitive adhesive emulsion blend comprising an aqueous pressure sensitive adhesive polymer emulsion and a high Tg polymer emulsion, said high Tg polymer having a Tg of 30° C. to 300° C., a number average particle size of 80 nm to 1000 nm, and a particle size distribution in which less than 10% of total particles are less than 80 nm, and less than 10% of the total particles are greater than 1000 nm.
An aqueous based pressure sensitive adhesive emulsion blend comprising an aqueous pressure sensitive adhesive polymer emulsion and a high Tg polymer emulsion, said high Tg polymer having a Tg of 50° C. to 300° C. and a number average particle size of 80 nm to 1000 nm, said aqueous pressure sensitive adhesive polymer emulsion having a number average particle size of less than 500 nm.
Dependencies are inferred from the claim text.