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1. (WO2017040020) ADHESIVE COMPOSITIONS AND MULTILAYERED STRUCTURES COMPRISING FUNCTIONALIZED POLYPROPYLENE

Pub. No.:    WO/2017/040020    International Application No.:    PCT/US2016/047124
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Aug 17 01:59:59 CEST 2016
IPC: B32B 27/30
B32B 27/32
B32B 27/34
C09J 151/06
C08L 23/14
C08L 51/06
C08L 23/16
Applicants: E.I. DU PONT DE NEMOURS AND COMPANY
Inventors: LEE, I-Hwa
DENG, Qian
Title: ADHESIVE COMPOSITIONS AND MULTILAYERED STRUCTURES COMPRISING FUNCTIONALIZED POLYPROPYLENE
Abstract:
Provided are functionalized polypropylene adhesive compositions having a desirable range of melt flow rate. These compositions are obtained by grafting at least one impact polypropylene copolymer or by co-grafting a blend containing at least one impact polypropylene copolymer and at least one random polypropylene copolymer. The polypropylene copolymer(s) are grafted with one or more ethylenically unsaturated carboxylic acids or derivatives of these acids, such as anhydrides. Maleic anhydride is a preferred grafting monomer. Also provided is a multilayer film or sheet structure containing at least one barrier layer and at least one adhesive layer produced from the functionalized polypropylene adhesive composition. The multilayer film or sheet structure may also contain at least one predominantly polypropylene-based layer. In addition, a multilayer film or sheet structure is provided in which a barrier layer or a primer layer is adjacent to at least one layer that is produced from a dry blend or a melt blend of the functionalized polypropylene adhesive composition with a polypropylene matrix polymer.