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1. (WO2017155498) DIISOCYANATE-SCAVENGING PACKAGING LAMINATES

Pub. No.:    WO/2017/155498    International Application No.:    PCT/US2016/021134
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Mar 08 00:59:59 CET 2016
IPC: B65D 30/14
C08G 18/80
C09D 175/04
C09D 175/12
C09J 175/04
C09J 175/12
Applicants: BEMIS COMPANY, INC.
Inventors: HUANG, James, C.
MEHTA, Devanshu, V.
Title: DIISOCYANATE-SCAVENGING PACKAGING LAMINATES
Abstract:
The present invention is directed to packaging laminates for containing a food or pharmaceutical/medical product which includes an exterior film, a multilayer interior film comprising a diisocyanate-scavenging layer and an adhesive-contact layer, and a polyurethane adhesive layer bonding the exterior film to the multilayer interior film. The present invention reduces the amount of any unreacted diisocyanate precursor and primary amines which can migrate to a product in packaging assemblies formed with a polyurethane adhesive. This is achieved when an interior film (commonly known as a sealant film) includes a layer comprising a non-polymeric polyol which is not in direct contact with the polyurethane adhesive. With this approach, the non-polymeric polyol reacts with any residual diisocyanate and/or primary amines which migrates from the polyurethane adhesive through the laminated assembly and thus, neutralizes any potential undesirable effects of these compounds.