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1. (WO2017055045) NON-REACTIVE HOT-MELT ADHESIVE WITH SPECIFIC RESIN

Pub. No.:    WO/2017/055045    International Application No.:    PCT/EP2016/071143
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Fri Sep 09 01:59:59 CEST 2016
IPC: C09J 167/00
C09J 167/04
C08L 67/00
C08L 67/04
Applicants: PURAC BIOCHEM BV
Inventors: SCHAEKENS, Chris Francois Hubert
GOBIUS DU SART, Gerrit
BRAAM, Kevin Bernardus
Title: NON-REACTIVE HOT-MELT ADHESIVE WITH SPECIFIC RESIN
Abstract:
The invention pertains to a non-reactive hot-melt adhesive comprising - 10-90 wt.%, calculated on the weight of the adhesive, of amorphous thermoplastic resin which is compatible with polylactic acid, wherein the amorphous thermoplastic resin is a random copolymer of lactic acid and further reactive monomer, - 10-90 wt.%, calculated on the weight of the adhesive, of a polylactic acid polymer unit (PLAU) selected from poly-L-lactic acid (PLLAU) and poly-D-lactic acid (PDLAU), the unit having a number average molecular weight of at least 0.7 kg/mol. In one embodiment the non-reactive hot-melt adhesive further comprises 0.5-20 wt.%, preferably 1-10 wt.%, calculated on the weight of the first PLAU, of a second polylactic acid polymer unit (PLAU) selected from poly-L-lactic acid (PLLAU) and poly-D-lactic acid (PDLAU), the unit having a number average molecular weight of at least 0.75 kg/mol, wherein when the first PLAU is PLLAU, the second PLAU is PDLAU and when the first PLAU is PDLAU, the second PLAU is PLLAU. The non-reactive hot-melt according to the invention has desirable properties. It combines, int.al., a good adhesive performance with a good storage stability resulting from a low cold-flow, and may have a short set time.