Patent ID: 11873429
Assignee: BOSTIK SA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 11:
12. A hot-melt, pressure-sensitive adhesive composition comprising:
a) at least one polyurethane comprising at least two end functional groups T of following formula (I):
wherein Rv represents a hydrogen atom or a methyl radical and X represents —O—or —NR′N— with R′N representing a hydrogen atom or a linear or branched alkyl radical comprising from 1 to 20 carbon atoms;
b) at least one tackifying resin chosen from the following resins:
(b1) terpene/phenolic resins;
(b2) resins resulting from polymerization of a-methylstyrene, optionally followed by a reaction with at least one phenol;
(b3) polymeric resins resulting from mainly C9 aromatic fractions; and

c) at least one polymerization inhibitor;
wherein the polyurethane(s) (a):tackifying resin(s) (b) ratio by weight ranges from 4: 6 to 64, and wherein the adhesive composition does not comprise other tackifying resins than the tackifying resins (b1), (b2) and (b3).