Polyester tackifier and adhesive composition

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

Reexamination Certificate

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C524S845000, C525S054500, C528S295500, C156S332000

Reexamination Certificate

active

06989413

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.

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Berry, D.A., et al., Novel Rosin Derivatives as Tackifiers For Pressure Sensitive Adhesives, Dec. 1970, vol. 13, No. 12, pp. 16-19.
European Search Report for EP00850030, 3 pgs.

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