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1. (WO2018007451) HOT-MELT ADHESIVES PROCESSABLE WITH HIGH SPEED PROCESSES

Pub. No.:    WO/2018/007451    International Application No.:    PCT/EP2017/066789
Publication Date: Fri Jan 12 00:59:59 CET 2018 International Filing Date: Thu Jul 06 01:59:59 CEST 2017
IPC: C08L 23/20
C08F 2/00
C09J 123/20
Applicants: SAVARE' I.C. S.R.L.
Inventors: CORZANI, Italo
SAVARE', Biagio
Title: HOT-MELT ADHESIVES PROCESSABLE WITH HIGH SPEED PROCESSES
Abstract:
The present invention discloses new hot-melt adhesive formulations having improved processability and that are easily processable even with processes at high speed and in particular with Spraying or Fiberization processes. Said hot-melt adhesive formulations comprise, as their main polymer component, at least one isotactic metallocene butene-1 polymer composition, that has a low viscosity, and that has a substantially bimodal composition, directly obtained during polymerization, in two consecutive and separate reaction steps, where the first polymer (polymer A) of said compositionally bimodal polymer composition is an isotactic butene-1 homopolymer or an isotactic butene-1 copolymer with another olefin, while the second polymer (polymer B) is an isotactic copolymer of butene-1, with another olefin, with a chemical composition obviously different from A, qualitatively and / or quantitatively; said hot-melts further comprising a viscosity modifier that is not solid at room temperature. The hot-melt adhesive formulations according to the present invention are particularly suitable for being used in manufacturing absorbent hygienic articles, in various types of applications inside said articles.