Polyester tackifier and adhesive composition
AssigneeAkzo Nobel N.V.
InventorsJohn Hazen, Patrick Peter Mario Aarts
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Abstract
The invention relates to a novel polyester tackifier, adhesive compositions comprising the tackifier and methods of preparation. More specifically, the polyester tackifier is obtainable by polymerising a mixture comprising a diacid or derivative thereof, a diol, and at least 6 molar % of an organic monofunctional compound, wherein the mixture is essentially free from compounds comprising more than two carboxylic acid groups or alcohol groups.
Claims19
An aqueous or a hot melt pressure sensitive adhesive composition comprising a polymer and a non-branched polyester tackifier, wherein the polyester tackifier is obtained by polymerizing a mixture comprising a diacid or derivative thereof, a diol, and between 6 molar % and 40 molar % of an organic monofunctional compound, the mixture being essentially free from compounds comprising more than two carboxylic acid groups or two alcohol groups.
A method of making a non-branched polyester tackifier comprising polymerizing a mixture of diacid or derivative thereof, a diol and between 6 molar % and 40 molar % of an organic monofunctional compound in an inert gas atmosphere at a temperature between 150° C. to 350° C., wherein the mixture is essentially free from compounds comprising more than two carboxylic acid groups or two alcohol groups.
Dependencies are inferred from the claim text.