Abstract: Plasticizer migration-resistant, UV-curable hotmelt adhesive for graphics films and labels made of plasticized PVC Described here is a UV-curable hotmelt adhesive largely resistant to plasticizer migration and comprising a UV-crosslinkable poly(meth)acrylate formed from methyl acrylate, C4-18 alkyl (meth)acrylate, monomer with acid groups, copolymerized photoinitiator and optionally further monomers. The hotmelt adhesive further comprises an aliphatic polyester polymer. The use of the hotmelt adhesive on graphics films and self-adhesive labels made of plasticized PVC is also described.

Abstract: An adhesive label is described comprising a backing material, a pressure-sensitive adhesive layer attached to the backing material and either a release liner attached to the adhesive layer or a release coating on the other side of the backing material. The backing material is made of paper or home compostable and biodegradable polymer film, and the pressure-sensitive adhesive layer is made from an aqueous polyurethane dispersion pressure-sensitive adhesive. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from di hydroxy carboxylic acids and diamino carboxylic acids, wherein the polyurethane has no melting point above 20° C. or wherein the polyurethane has a melting point above 20° C. with an enthalpy of fusion lower than 10 J/g, and wherein a film of the polyurethane adhesive preferably decomposes at home compost conditions to more than 90% by weight into CO2 and water within 360 days.

Abstract: A method is described for debonding a bonded article. The bonded article comprises at least two components which are bonded to one another by means of a polyurethane adhesive selected from aqueous polyurethane dispersion adhesives and polyurethane hotmelt adhesives. At least one of the components is a thermoplastic polyurethane. The components are debonded by treatment with an aqueous surfactant composition at elevated temperatures.

Abstract: A process can be used for preparing cyclic carbonates with an exocyclic vinylidene group by reacting a propargylic alcohol with CO2 in the presence of a silver catalyst having at least one bulky ligand a lipophilic carboxylate ligand. After completion of the reaction, the catalyst is separated from the cyclic carbonate by the use of two organic solvents of different polarity and having a miscibility gap. The silver catalyst is enriched in the less polar solvent and the cyclic carbonate in the more polar solvent.

Abstract: A description is given of the use of compounds having n 2-oxo-1,3-dioxolane-4-carboxamide units as a reactive component in 2-component adhesives, especially for preparing hydroxypolyurethanes or hydroxypolycarbonates for adhesives applications, where n is a number greater than or equal to 2. A description is also given of corresponding two-component adhesives and adhesive bonding methods. Employed preferably as a second component of the two-component adhesive is a polyfunctional curing agent compound which is preferably selected from polyamines which have two or more amine groups and polyols which have two or more alcoholic hydroxyl groups.

Abstract: A compound of formula (I) wherein R1 is hydrogen or an organic radical of 1 to 100 carbon atoms, R2, R3 are independently hydrogen or an organic radical of 1 to 100 carbons, Z is a single bond or a divalent organic group of 1 to 100 carbons, A is an (n+m)-valent organic group of 1 to 1 000 000 carbons, X is a single bond or a divalent organic group of 1 to 40 carbons, n is an integer from 1 to 1000, m is 0, 1, or 2, the sum of n+m being an integer from 2 to 1002. Such compounds are obtainable from specific 4-oxy-but-2-yn-1-ol derivatives, or used as intermediate(s), crosslinker(s), or monomer(s) in polymerization or oligomerization reactions, or for two-component compositions having such compound(s) and multifunctional hardener(s). Such compound(s) may be used to prepare polyunsaturated compounds, by reaction with an (oligo/poly)-functional nucleophile, or polymers.

Abstract: The use of an aqueous polyurethane dispersion adhesive is described for producing composite foils which are biodisintegratable at home compost conditions where at least two substrates are adhesive-bonded to one another with use of the polyurethane dispersion adhesive, where at least one of the substrates is a polymer foil which is biodisintegratable at home compost conditions. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxy carboxylic acids and diamino carboxylic acids, wherein the polyurethane has no melting point above 20° C. or wherein the polyurethane has a melting point above 20° C. with an enthalpy of fusion lower than 10 J/g, and wherein a film of the polyurethane adhesive is biodegradable at home compost conditions.

Abstract: The present invention describes novel macromonomers containing polyisobutene groups and homo- or copolymers thereof.

Abstract: A process for continuously preparing a polymer by free-radical polymerization, the process includes: continuously feeding to a reactor a mixture including about 20 wt % to about 96 wt % of a vinylic monomer, the vinylic monomer comprising a styrenic monomer, a (meth)acrylic monomer, or a mixture thereof, greater than 0 wt % to about 0.25 wt % of a polymerization initiator, and about 4 wt % to about 80 wt % of a reaction solvent; maintaining the reactor at a temperature from about 120° C. to about 190° C.; and collecting the polymer; where the polymer has a weight average molecular weight (Mw) from 20,000 g/mol to about 300,000 g/mol.

Abstract: A bonding process is described in which two substrates are bonded together by applying to the surface of at least one of the substrates a curable, not yet cured 2-component adhesive that comprises, in a first component, a compound A having at least one defined cyclic thiocarbonate unit having a five-membered ring structure and, in a second component, a curing compound B selected from compounds having at least one functional group selected from primary amine groups and secondary amine groups.

Abstract: A compound of formula (I) wherein R1 is hydrogen or an organic radical of 1 to 100 carbon atoms, R2, R3 are independently hydrogen or an organic radical of 1 to 100 carbons, Z is a single bond or a divalent organic group of 1 to 100 carbons, A is an (n+m)-valent organic group of 1 to 1 000 000 carbons, X is a single bond or a divalent organic group of 1 to 40 carbons, n is an integer from 1 to 1000, m is 0, 1, or 2, the sum of n+m being an integer from 2 to 1002. Such compounds are obtainable from specific 4-oxy-but-2-yn-1-ol derivatives, or used as intermediate(s), crosslinker(s), or monomer(s) in polymerization or oligomerization reactions, or for two-component compositions having such compound(s) and multifunctional hardener(s). Such compound(s) may be used to prepare polyunsaturated compounds, by reaction with an (oligo/poly)-functional nucleophile, or polymers.

Abstract: Described are polyurethane-vinyl hybrid polymers, methods of making them and their use. The hybrid polymers are made from an anionic polyurethane and a polymerizable vinyl compound, wherein the polymerizable vinyl compound is selected from methylene malonates, methylene beta-ketoesters and methylene beta-diketones. The hybrid polymers can be used as binder in structural adhesives, as binder in pressure-sensitive adhesives, as binder in laminating adhesives, as binder in contact adhesives, as binder in ink, as binder in paints, as binder in coatings, as binder for fiber bonding, as binder for particle bonding or as binder in high cohesion adhesive tapes.

Abstract: Plasticizer migration-resistant, UV-curable hotmelt adhesive for graphics films and labels made of plasticized PVC Described here is a UV-curable hotmelt adhesive largely resistant to plasticizer migration and comprising a UV-crosslinkable poly(meth)acrylate formed from methyl acrylate, C4-18 alkyl (meth)acrylate, monomer with acid groups, copolymerized photoinitiator and optionally further monomers. The hotmelt adhesive further comprises an aliphatic polyester polymer. The use of the hotmelt adhesive on graphics films and self-adhesive labels made of plasticized PVC is also described.

Abstract: What are described are compounds having two or more exovinylene cyclocarbonate units, wherein the exovinylene cyclocarbonate units are bonded to one another via at least one organic, siloxane-free connecting group which is not bonded directly to the exovinylene double bonds, excluding connecting groups formed by polymerization of (meth)acrylic monomers. The connecting group preferably has at least one acetal group. Also described are a process for preparing the compounds, two-component binders comprising the compounds, and uses of the compounds.

Abstract: Described are polyurethane-vinyl hybrid polymers, methods of making them and their use. The hybrid polymers are made from an anionic polyurethane and a polymerizable vinyl compound, wherein the polymerizable vinyl compound is selected from methylene malonates, methylene beta-ketoesters and methylene beta-diketones. The hybrid polymers can be used as binder in structural adhesives, as binder in pressure-sensitive adhesives, as binder in laminating adhesives, as binder in contact adhesives, as binder in ink, as binder in paints, as binder in coatings, as binder for fiber bonding, as binder for particle bonding or as binder in high cohesion adhesive tapes.

Abstract: What are described are copolymers formed from (a) at least one monomer M1 of the formula in which R1 is an organic radical having a (meth)acryloyl group, R2, R3 and R4 are each independently a hydrogen atom or a C1- to C10-alkyl group; and (b) at least one ethylenically unsaturated, free-radically copolymerizable monomer M2 other than the monomers M1. What are also described are two-pack adhesives comprising the copolymers and a polyfunctional hardener. The copolymers and the two-pack adhesives can be used as laminating adhesives.

Abstract: What are described are compounds having two or more exovinylene cyclocarbonate units, wherein the exovinylene cyclocarbonate units are bonded to one another via at least one organic, siloxane-free connecting group which is not bonded directly to the exovinylene double bonds, excluding connecting groups formed by polymerization of (meth)acrylic monomers. The connecting group preferably has at least one acetal group. Also described are a process for preparing the compounds, two-component binders comprising the compounds, and uses of the compounds.

Abstract: The present invention provides a composition having two separate, reactive components that when mixed together form a reactive mixture that undergoes curing or hardening, said two-component sealant and/or adhesive composition comprising: i) in a first component, at least one compound (VCC) having two or more exo-vinylene cyclic carbonate units, wherein said exo-vinylene cyclic carbonate units are bonded to one another by means of at least one organic, siloxane-free linking group, wherein said linking group is not directly bonded to the exo-vinylene double bonds and linking groups formed by polymerization of (meth)acrylic monomers are excluded; and, ii) in a second component, at least one multifunctional hardener that has at least two functional groups (F) selected from the group consisting of primary amino groups, secondary amino groups, hydroxy groups, phosphine groups, phosphonate groups, and mercaptan groups, wherein the compound (VCC) of said first component is characterized in that it has at least on

Abstract: The present invention describes novel macromonomers containing polyisobutene groups and homo- or copolymers thereof.

Abstract: Disclose herein are aqueous polymer dispersions for pressure-sensitive adhesives, as well as processes for the preparation of the aqueous polymer dispersions, and use of the aqueous polymer dispersions.