Patent ID: 8389596
Filing Date: 2013-03-05
Classification: B65D,C08K,C09J

Abstract:
1. A UV-curable pressure sensitive adhesive comprising: a UV-curable acrylic oligomer, a tack control component, and optionally at least one elastomeric material; an adhesive component ratio (ACR) of the pressure sensitive adhesive defined by formula (A) where the weight percent of the UV-curable acrylic oligomer relative to the sum of the weight percents of the tack control component and the elastomeric material is about 0.5 to about 1.5 the ACR effective so that a UV-cured pressure sensitive adhesive forms a first peel adhesion force between opposing strips of the UV-curable pressure sensitive adhesive of about 200 to about 900 grams per linear inch (gpli) and up to five subsequent peel adhesions between the opposing strips each about 30 to about 200 percent of the first peel adhesion and a first subsequent peel adhesion between the opposing strips after fouling with debris at least about 50 percent of the first peel adhesion; a liquid mixture of the UV-curable acrylic oligomer, the tack control component, and the optional elastomeric material are compatible such that the liquid mixture remains a stable liquid that is homogeneous without phase separation for at least about 3 days at about 70 to about 75° F.; wherein the UV-curable acrylic oligomer is an acrylic acid ester; wherein the acrylic acid ester is an acrylic acid ester of a vegetable oil; and wherein each of the opposing strips of the UV-cured pressure sensitive adhesive is applied to a substrate selected from the group consisting of paper, foil, and polymers wherein the polymers are selected from the group consisting of polyethylene, polybutylene, ethylene vinyl acetate, polyamides, polyvinyl chloride, ethylene vinyl alcohol, polyvinylidene chloride, polyvinyl alcohol, polystyrene, and combinations thereof.