One aspect of the present invention resides in a hot melt adhesive including a thermoplastic polymer and a tackifier, wherein the tackifier includes an acid-modified tackifier that is modified by at least one of maleic acid and maleic anhydride, and by at least one selected from the group consisting of acrylic acid, methacrylic acid, an acrylic acid ester, and a methacrylic acid ester.

A polymerizable composition comprising a (meth)acrylate copolymer having pendent photoinitiator groups and a high T.sub.g monomer or macromer is described. The resulting copolymer is physically crosslinking and is of the formula I: (I).

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Adhesive compositions comprising a copolymer of isobutylene repeat units and alkene repeat units are described. At least a portion of the alkene repeat units are bonded to a pendent nitrogen atom of a quaternary ammonium salt comprising a free-radically polymerizable substituent. The adhesive optionally comprises other components such as tackifier, unfunctionalized polyisobutylene polymer, plasticizer, and combinations thereof.

A (meth)acrylic copolymer (A) having a mass average molecular weight of 50,000 to 1,000,000, in which the (meth)acrylic copolymer (A) is obtained by polymerizing a monomer mixture including a macromonomer (a) that has a number average molecular weight of 500 or more and less than 6000 and a vinyl monomer (b), and preferably includes 7 to 40% by mass of a repeat unit derived from the macromonomer (a), has sufficient coating workability, adhesive holding power and adhesive property as an adhesive composition.

Adhesive compositions are described which can be selectively detackified or deadened. Articles using such adhesive compositions are also described. Also described are techniques in which select regions of adhesive layers in the articles are detackified. Also described are systems and methods using the various articles and adhesive compositions. And particular label constructions are described.

Adhesive compositions are described which can be selectively detackified or deadened. Articles using such adhesive compositions are also described. Also described are techniques in which select regions of adhesive layers in the articles are detackified. Also described are systems and methods using the various articles and adhesive compositions. And particular label constructions are described.

Multilayer product comprising at least one layer of an acrylate-based foam carrier (S); and a multiphase polymer composition (P) applied to this layer; the multiphase polymer composition (P) comprising: a comb copolymer (A) which is obtainable by polymerization of at least one (meth)acrylate monomer in the presence of at least one macromer selected from the group consisting of polymerizable ethylene-butylene, ethylene-propylene, ethylene-butylene-propylene and isobutylene macromers, and which forms a continuous acrylate phase and a discontinuous hydrocarbon phase Kw; and at least one hydrocarbon component (B) which is soluble in the hydrocarbon phase Kw of the comb copolymer (A) and comprises at least one plasticizer resin and at least one solid resin;
the multiphase polymer composition (P) having a continuous acrylate phase with a static glass transition temperature Tg(Ac), measured by the DSC method, and a discontinuous hydrocarbon phase Kw1, comprising the hydrocarbon component (B) and having a static glass transition temperature Tg(Kw1), measured by the DSC method, where Tg(Kw1) is higher than Tg(Ac) by 35 to 60 kelvins.

Multilayer product comprising at least one layer of an acrylate-based foam carrier (S); and a multiphase polymer composition (P) applied to this layer; the multiphase polymer composition (P) comprising: a comb copolymer (A) which is obtainable by polymerization of at least one (meth)acrylate monomer in the presence of at least one macromer selected from the group consisting of polymerizable ethylene-butylene, ethylene-propylene, ethylene-butylene-propylene and isobutylene macromers, and which forms a continuous acrylate phase and a discontinuous hydrocarbon phase Kw; and at least one hydrocarbon component (B) which is soluble in the hydrocarbon phase Kw of the comb copolymer (A) and comprises at least one plasticizer resin and at least one solid resin;
the multiphase polymer composition (P) having a continuous acrylate phase with a static glass transition temperature Tg(Ac), measured by the DSC method, and a discontinuous hydrocarbon phase Kw1, comprising the hydrocarbon component (B) and having a static glass transition temperature Tg(Kw1), measured by the DSC method, where Tg(Kw1) is higher than Tg(Ac) by 35 to 60 kelvins.

The present disclosure provides a water-based polymeric pressure-sensitive adhesive and a label material comprising the pressure-sensitive adhesive. The pressure-sensitive adhesive has a strong adhesive force when being used for a label material, and is easy to cut off, non-adhesive and good in re-peeling property when die-cutting processing is performed for the label material. The pressure-sensitive adhesive is prepared from 4-6 parts of water-soluble polyester, 16-18 parts of C.sub.1-C.sub.4 alkyl ester of methacrylic acid, 16-18 parts of C.sub.4-C.sub.8 alkyl ester of acrylic acid, 2-8 parts of ureido methacrylate and 4-5 parts of cycloalkyl ester of methacrylic acid, the cycloalkyl ester of methacrylic acid is C.sub.5-C.sub.20 cycloalkyl ester, and the water-soluble polyester is prepared from 1-5 parts of sulfonate for polyester modification, 10-15 parts of hydroxyalkyl ester of (methyl) acrylic acid, 60-80 parts of terephthalic acid and 20-30 parts of ethylene glycol.

The present disclosure provides a water-based polymeric pressure-sensitive adhesive and a label material comprising the pressure-sensitive adhesive. The pressure-sensitive adhesive has a strong adhesive force when being used for a label material, and is easy to cut off, non-adhesive and good in re-peeling property when die-cutting processing is performed for the label material. The pressure-sensitive adhesive is prepared from 4-6 parts of water-soluble polyester, 16-18 parts of C.sub.1-C.sub.4 alkyl ester of methacrylic acid, 16-18 parts of C.sub.4-C.sub.8 alkyl ester of acrylic acid, 2-8 parts of ureido methacrylate and 4-5 parts of cycloalkyl ester of methacrylic acid, the cycloalkyl ester of methacrylic acid is C.sub.5-C.sub.20 cycloalkyl ester, and the water-soluble polyester is prepared from 1-5 parts of sulfonate for polyester modification, 10-15 parts of hydroxyalkyl ester of (methyl) acrylic acid, 60-80 parts of terephthalic acid and 20-30 parts of ethylene glycol.