The present invention provides a hotmelt adhesive composition, comprising (A) at least one polyurethane prepolymer obtained by reacting (A1) polyols comprising: (a) at least one polyester polyol, and (b) at least one polyether polyol, with (A2) at least one polyisocyanate having at least two isocyanate groups in one molecule; (B) at least one thermoplastic resin; and (C) at least one aspect ratio promoter in an amount of no more than 10% by weight based on the total weight of the composition.

The present invention provides a hotmelt adhesive composition, comprising (A) at least one polyurethane prepolymer obtained by reacting (A1) polyols comprising: (a) at least one polyester polyol, and (b) at least one polyether polyol, with (A2) at least one polyisocyanate having at least two isocyanate groups in one molecule; (B) at least one thermoplastic resin; and (C) at least one aspect ratio promoter in an amount of no more than 10% by weight based on the total weight of the composition.

A thermoplastic polyurethane resin suitable for a laminating process and a method for producing the same are provided. The thermoplastic polyurethane resin is formed of an isocyanate component, a polyol component, a chain extender component, and a chain terminator component that is a monohydric alcohol via a polymerization reaction. The polyol component includes a first polyol having a number average molecular weight between 600 and 2,000 g/mol and a second polyol having a number average molecular weight between 1,500 and 3,000 g/mol. The chain extender component includes a first chain extender and a second chain extender. The first chain extender is a dihydric alcohol having a carbon chain length of C2-6, and a molecular structure thereof is linear and symmetrical. The second chain extender is a dihydric alcohol having a carbon chain length of C3-10, and a molecular structure thereof has a side chain and/or an ether group.

The present disclosure provides a two-component polyurethane adhesive composition and a bonding method thereof. The two-component polyurethane adhesive composition includes A) a polyol component, and B) an isocyanate component. The polyol component includes A1) one or more polyether polyols, and the isocyanate component includes B1) a first isocyanate prepolymer, wherein the first isocyanate prepolymer is polymerized from isocyanate and a non-linear chain extender. The two-component polyurethane adhesive composition of the present disclosure has good mechanical properties, in particular, high G modulus and high elongation. The polyol component in the two-component polyurethane adhesive composition has good phase stability, and good miscibility with the isocyanate component. The two-component polyurethane adhesive composition of the present disclosure can be used for the production and manufacture of mechanical parts such as automobile components.

The present disclosure provides a two-component polyurethane adhesive composition and a bonding method thereof. The two-component polyurethane adhesive composition includes A) a polyol component, and B) an isocyanate component. The polyol component includes A1) one or more polyether polyols, and the isocyanate component includes B1) a first isocyanate prepolymer, wherein the first isocyanate prepolymer is polymerized from isocyanate and a non-linear chain extender. The two-component polyurethane adhesive composition of the present disclosure has good mechanical properties, in particular, high G modulus and high elongation. The polyol component in the two-component polyurethane adhesive composition has good phase stability, and good miscibility with the isocyanate component. The two-component polyurethane adhesive composition of the present disclosure can be used for the production and manufacture of mechanical parts such as automobile components.

A biodegradable pressure-sensitive adhesive which can be readily coated indirectly onto biodegradable carriers, which comprises

at least 60 wt % of at least one polyurethane, and
at least one sulfonated carboxylic ester; and a method for producing a biodegradable adhesive tape, which comprises providing a pressure-sensitive adhesive of the invention as a dispersion in at least one organic solvent; coating this dispersion onto a release liner; removing the organic solvent; and transferring the pressure-sensitive adhesive onto a biodegradable carrier.

A biodegradable pressure-sensitive adhesive which can be readily coated indirectly onto biodegradable carriers, which comprises

at least 60 wt % of at least one polyurethane, and
at least one sulfonated carboxylic ester; and a method for producing a biodegradable adhesive tape, which comprises providing a pressure-sensitive adhesive of the invention as a dispersion in at least one organic solvent; coating this dispersion onto a release liner; removing the organic solvent; and transferring the pressure-sensitive adhesive onto a biodegradable carrier.

Described are aqueous adhesive dispersions comprising dispersed polyurethanes and also ethoxylated fatty alcohols as emulsifiers. The polyurethanes are constructed from certain organic diisocyanates, dihydroxy compounds selected from certain polyester diols and polyether diols, and compounds having groups reactive toward isocyanate groups and having at least one ionic group. The adhesive dispersions can be used as laminating adhesives, for example for composite film lamination or for the lamination of rigid moldings with flexible decorative foils.

Described are aqueous adhesive dispersions comprising dispersed polyurethanes and also ethoxylated fatty alcohols as emulsifiers. The polyurethanes are constructed from certain organic diisocyanates, dihydroxy compounds selected from certain polyester diols and polyether diols, and compounds having groups reactive toward isocyanate groups and having at least one ionic group. The adhesive dispersions can be used as laminating adhesives, for example for composite film lamination or for the lamination of rigid moldings with flexible decorative foils.

Provided is an adhesive which, in a metal foil-containing laminated composite film used in a high temperature sterilization treatment, is resistant to the effects of moisture in the air during curing, has good workability when used as a solvent-free adhesive, and exhibits excellent adhesive strength and acid resistance. Provided is a method for producing an adhesive composition, the method including: a step of obtaining an alcohol-added isocyanate (E) by reacting a trifunctional or higher isocyanate compound (C2) and a monofunctional alcohol (D) at an equivalence ratio of isocyanate groups in the trifunctional or higher isocyanate compound (C2):monofunctional alcohol (D)=100 mol %:25 to 65 mol %, and a step of mixing a polyisocyanate (A) containing a trifunctional or higher isocyanate compound (C1) and the alcohol-added isocyanate (E), and an alcohol (B) having an acid value of 0.5 to 30 mgKOH/g, so that the equivalence ratio between isocyanate groups in the polyisocyanate (A) and hydroxyl groups in the alcohol (B) (isocyanate groups/hydroxyl groups) is within a range from 0.7 to 2.5.