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1. (US20060199921) Preparation of transparent multilayered articles

Office : United States of America
Application Number: 11363481 Application Date: 27.02.2006
Publication Number: 20060199921 Publication Date: 07.09.2006
Grant Number: 7786252 Grant Date: 31.08.2010
Publication Kind : B2
IPC:
C08G 64/00
C08F 6/00
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
64
Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
6
Post-polymerisation treatments
CPC:
C08L 69/00
B32B 2272/00
B32B 2305/70
B32B 2307/412
C08K 3/08
C08L 67/00
C08L 67/02
C08L 77/00
C08L 77/02
C08L 77/06
C08L 2205/02
Applicants: Eastman Chemical Company
Inventors: Hale Wesley Raymond
Pecorini Thomas Joseph
Stewart Mark Edward
Rogers Martin Emerson
Gilliam Spencer Allen
Cliffton Michael Duane
Shelby Marcus David
Agents: Middlemas Eric D.
Graves, Jr. Bernard J.
Priority Data:
Title: (EN) Preparation of transparent multilayered articles
Abstract:
(EN)

Disclosed is a process for the preparation of multilayered, shaped articles having high transparency and low haze having at least one layer contains one or more thermoplastic polymers selected from polyesters, polycarbonates, and homogeneous blends thereof, and a separate layer which contains a transamidized, homogeneous blend of a least two polyamides. The thermoplastic polymer components and the polyamide components have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into one or more of the layers of the article while maintaining high clarity. These articles can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into one or more layers to impart oxygen-scavenging properties.