Patent ID: 11912000
Assignee: BOSTIK SA
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 2:
3. The multilayer film as claimed in claim 1, wherein the tackifying resin(s) (a2) have weight-average molar masses Mw of generally between 300 and 5000 Da and are:
(i) rosins of natural origin or modified rosins;
(ii) resins obtained by hydrogenation, polymerization or copolymerization (with an aromatic hydrocarbon) of mixtures of unsaturated aliphatic hydrocarbons having approximately 5, 9 or 10 carbon atoms resulting from petroleum fractions;
(iii) terpene resins generally resulting from the polymerization of terpene hydrocarbons, which are optionally modified by the action of phenols; and/or
(iv) copolymers based on natural terpenes.