Pressure sensitive adhesives based on renewable resources, UV curing and related methods
AssigneeAvery Dennison Corporation
InventorsCarol A. Koch, Srikant Pathak
Life of this patent
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Abstract
One embodiment is a pressure sensitive adhesive label or tape that comprises a facestock, and a pressure sensitive adhesive composition disposed on the facestock and the pressure sensitive adhesive composition includes a product made from reacting an epoxidized naturally occurring oil or fat with a dimer acid. Another embodiment of the invention is a method that comprises reacting an epoxidized naturally occurring oil or fat with a dimer acid to form a PSA precursor; coating the PSA precursor onto a carrier and curing the PSA precursor via UV radiation to form a pressure sensitive adhesive.
Claims12
A method comprising:
- reacting an epoxidized naturally occurring oil or fat with at least one dimer acid to form a pressure sensitive adhesive precursor at an elevated temperature for a given period of time;
- mixing a photoacid generator with the PSA precursor to form an intermediate product;
- applying the intermediate product onto a carrier;
- UV radiation curing the intermediate product to form a PSA;
- and
- thermally post curing the PSA at a post curing temperature for a period of less than about 2 minutes.
Dependencies are inferred from the claim text.