A reactive PSA film that includes: (a) a polymeric film former matrix; (b) one or more reactive components; and (c) a reagent selected from an initiator, a curing agent and an activator. The component (b) is present at a mass fraction of 30%, as based on the sum of (a), (b) and (c). Further, ≥50 wt % of the polymer film former matrix is a crystallizable polymer which: (i) exhibits a crystallization enthalpy of <1 J/g in a DSC measurement on cooling at 10 K/min from at least 30K above a peak temperature of the melting peak of the matrix and ≥100° C.; and (ii) exhibits a crystallite fusion enthalpy of ≥15 mJ/mg in its pure state in a first heating curve of a DSC measurement at 10 K/min and after storage for ≥ one month from 15 to 25° C. and relative humidity from 30 to 70%.

A reactive PSA film that includes: (a) a polymeric film former matrix; (b) one or more reactive components; and (c) a reagent selected from an initiator, a curing agent and an activator. The component (b) is present at a mass fraction of 30%, as based on the sum of (a), (b) and (c). Further, ≥50 wt % of the polymer film former matrix is a crystallizable polymer which: (i) exhibits a crystallization enthalpy of <1 J/g in a DSC measurement on cooling at 10 K/min from at least 30K above a peak temperature of the melting peak of the matrix and ≥100° C.; and (ii) exhibits a crystallite fusion enthalpy of ≥15 mJ/mg in its pure state in a first heating curve of a DSC measurement at 10 K/min and after storage for ≥ one month from 15 to 25° C. and relative humidity from 30 to 70%.

Lactide-based random polyester polyols for use in polyurethane compositions are disclosed. The polyester polyols have an OH value in the range of greater than 400 mg KOH/g up to 1100 mg KOH/g and are the reaction product of at least one polycarboxylic acid, at least one lactide, and one or more polyalcohols. The polyester polyols can be formulated into the B-side of a two part polyurethane composition to obtain a polyurethane having improved hardness and solvent resistance and a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.

Described herein is a polyester polyol, which is derived from a first reaction product of (a) a Component A, wherein the Component A is a phthalic acid, a phthalic anhydride or mixtures thereof, (b) a Component B, wherein the Component B is a dimer fatty acid, a dimer fatty acid diol or mixtures thereof, and (c) a Component C, wherein the Component C is an aliphatic diol, an aromatic diol, or mixtures thereof, wherein Component C comprises 2 to 10 carbon atoms and optionally catenated heteroatoms selected from O, S, and N. Also disclosed herein are polyurethane polymers and pressure sensitive adhesives made from the polyurethane polymers or the polyester polyols.

The invention relates to the use of aqueous dispersion adhesives on the basis of a mixture of aqueous polyurethane or polyurethane-urea dispersions for bonding foam substrates according to the spray coagulation method.

The invention relates to the use of aqueous dispersion adhesives on the basis of a mixture of aqueous polyurethane or polyurethane-urea dispersions for bonding foam substrates according to the spray coagulation method.

The invention relates to the use of aqueous dispersion adhesives on the basis of a mixture of aqueous polyurethane or polyurethane-urea dispersions for bonding foam substrates according to the spray coagulation method.

Disclosed herein is a polyurethane resin containing, as copolymerization components, a polycarbonate polyol (A), an organic diisocyanate (B) and a chain extender (C), wherein the polycarbonate polyol (A) contains a specific structure in an amount of 60 mol % or more and a glass transition temperature of the polyurethane resin is 50° C. or higher. The polyurethane resin has excellent heat resistance and satisfactory adhesive property to various substrates, and is usable as an adhesive composition.

A solvent-based two-component polyurethane-type adhesive composition comprises an —OH component and an —NCO component. The —OH component comprises an amorphous prepolymer including two —OH end groups, with a number-average molar mass M.sub.n of 8000 to 12, 000 g and is chosen from: a) a copolyester (A1) obtained by a polycondensation reaction of at least one aliphatic diol (i) with at least one aromatic diacid (ii) and at least one aliphatic diacid (iii); and b) a polyurethane (A2) obtained by a polyaddition reaction between an aliphatic diisocyanate compound and an amorphous copolyester diol with a number-average molecular weight M.sub.n ranging from 4000 to 11 500 g/mol. The —NCO component comprises a compound (B1) including three —NCO end groups, obtained by the reaction of meta-xylylene diisocyanate (m-XDI) with a triol, said compound (B1) being alone or as a mixture with a compound (B2) derived from an aliphatic diisocyanate.

A solvent-based two-component polyurethane-type adhesive composition comprises an —OH component and an —NCO component. The —OH component comprises an amorphous prepolymer including two —OH end groups, with a number-average molar mass M.sub.n of 8000 to 12, 000 g and is chosen from: a) a copolyester (A1) obtained by a polycondensation reaction of at least one aliphatic diol (i) with at least one aromatic diacid (ii) and at least one aliphatic diacid (iii); and b) a polyurethane (A2) obtained by a polyaddition reaction between an aliphatic diisocyanate compound and an amorphous copolyester diol with a number-average molecular weight M.sub.n ranging from 4000 to 11 500 g/mol. The —NCO component comprises a compound (B1) including three —NCO end groups, obtained by the reaction of meta-xylylene diisocyanate (m-XDI) with a triol, said compound (B1) being alone or as a mixture with a compound (B2) derived from an aliphatic diisocyanate.