Moisture-setting polyurethane adhesive for hygiene articles

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of at least one diisocyanate trimerized as isocyanurate, wherein said polyol is a polyester polyol that:
• i) has an average molecular mass of between 250 and 7,000 and an OH functionality of between 2 and 3, and
• ii) is a condensation product of polyols chosen from ethanediol, 1,2-propanediol, 1,3-propanediol, glycerol, trimethylolpropane, 1,6-hexanediol, 1,2,6-hexanetriol, butenediol, sucrose, glucose, sorbitol, pentaerythriol, mannitol, triethanolamine, N-methyldimethanolamine and mixtures of these compounds with an acid, an unsaturated anhydride, or a lactone;
• and
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of at least one polyol to at least one diisocyanate trimerized as isocyanurate, wherein said polyol is a polyester polyol that:
• i) has an average molecular mass of between 250 and 7,000 and an OH functionality of between 2 and 3, and
• ii) is a condensation product of ethanediol, 1,3-propanediol and/or 1,6-hexanediol with adipic acid and/or phalic acid;
• and
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive composing a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of at least one polyol to at least boric disoocyanate trimerized as isocyanurate, wherein the polyurethane prepolymer is a reaction product of:
• a mixture of polyols comprising 20 to 100% by weight of an aliphatic polyester polyol and of 0 to 80% by weight of an aliphatic/aromatic polyester polyol
• and of at least one diisocyanate trimerized as isocyanurate;
• and
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of at least one polyol to at least one diisocyanate trimerized as isocyanurate, wherein the polyurethane prepolymer is a reaction product:
• of a mixture of polyols comprising 30 to 50% by weight of an aliphatic polyester polyol and of 70 to 50% by weight of an aliphatic/aromatic polyester polyol
• and of at least one diisocyanate trimerized as isocyanurate, and;
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of at least one polyol to at least one diisocyanate trimerized as isocyanurate, wherein said polyol is a polyester polyol that:
• i) has an average molecular mass of between 250 and 7,000 and an OH functionality of between 2 and 3, and
• ii) is a condensation product of polyols chosen from ethanediol, 1,2-propanediol, 1,3-propanediol, 1,3-propanediol, glycerol, trimethylolpropane, 1,6-hexanediol, 1,2,6-hexanetriol, butenediol, sucrose, glucose, sorbitol, pentaerythritol, mannitol, triethanolamine, N-methyldimethanolamine and mixtures of these compounds with an acid, an unsaturated anhydride, or a lactone, wherein said acid is 1,6-hexanedioic acid, dodecanedioic acid, azelaic acid, sebacic acid, adipic acid, 1,18-octadecanedioic acid, phthalic acid, succinic acid or mixtures of these acids;
• and
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddinon of at least one polyol to at least one dusocyanate trimerized as isocyanurate, wherein said polyol is a polyester polyol that:
• i) has an average molecular mass of between 250 and 7,000 and an OH functionality of between 2 and 3, and
• ii) is a condensation product of polyols chosen from ethanediol 1,2-propanediol, 1,3-propanediol, glycerol, trimethylolpropane, 1,6-hexanediol, 1,2,6-hexanetriol, butenediol, sucrose, glucose, sorbitol, pentaerythritol, mannitol, triethanolamine, N-methyldimethanolamine and mixtures of these compounds with an acid, an unsaturated anhydride, or a lactone, wherein said unsaturated anhydride is maleic or phthalic anhydride;
• and
• b) 5 to 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.

A moisture-crosslinkable polyurethane adhesive, comprising:

• a) 70 to 95% by weight of a polyurethane prepolymer obtained by polyaddition of a at least one polyol to at least one diisocyanate trimerized as isocyanurate, wherein said polyol is a polyester polyol that:
• i) has an average molecular mass of between 250 and 7,000 and an OH functionality of between 2 and 3, and
• ii) is a condensation product of polyols chosen from ethanediol, 1,2-propanediol, 1,3-propanediol, glycerol, trimethylolpropane, 1,6-hexanediol, 1,2,6-hexanetriol, butenediol, sucrose, glucose, sorbitol, pentaerythyritol, mannitrol, triethanolamine, N-methyldimethanolamine, and mixtures of these compounds with an acid, an unsaturated anhydride, or a lactone, wherein said lactone is caprolactone;
• and
• b) 5 ro 30% by weight of an essentially amorphous poly-α-olefin,
• said adhesive comprising a content of free NCO groups representing 1 to 200% by weight of the adhesive.