PSA polymer of N-butyl acrylate, ethyl acrylate, vinyl acetate, and acid monomer
AssigneeBASF SE
InventorsMatthias Gerst, Gerhard Auchter, Cornelis Petrus Beyers
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Abstract
Described is a pressure-sensitive adhesive (PSA) polymer formed from (i) 50%-95% by weight of n-butyl acrylate, (ii) 1%-20% by weight of ethyl acrylate, (iii) 1%-20% by weight of vinyl acetate, (iv) 0.1%-5% by weight of at least one ethylenically unsaturated acid or ethylenically unsaturated acid anhydride, and (v) 0% to 30% by weight of other ethylenically unsaturated compounds different from the monomers (i) to (iv). The PSA polymer can be used for producing self-adhesive articles, more particularly paper labels or film labels.
Claims8
A pressure-sensitive adhesive polymer, comprising in a polymerized form:
- (i) from 55.25% to 85.25% by weight of n-butyl acrylate,
- (ii) from 5% to 7% by weight of ethyl acrylate,
- (iii) from 5% to 7% by weight of vinyl acetate,
- (iv) 0.2-3% by weight of (meth)acrylic acid, and
- (v) 4% to 34% by weight of at least one monomer selected from the group consisting of 2-ethyl hexyl acrylate, styrene, and hydroxypropyl acrylate,
- wherein the pressure-sensitive adhesive polymer exhibits a quickstick value of from 6.1 N/25 mm to 8.7 N/25 mm at 5° C. when applied to paper and bonded to polyethylene.
Dependencies are inferred from the claim text.