TITLE: Novel linear hydroquinone phenoxy polymers, process for making them and
use as blends with polyesters to obtain laminated films.
European Patent Application EP0033049 A1

ABSTRACT:
Abstract not available for EP0033049
Abstract of corresponding document: US4267301
This invention relates to a process for the preparation of
thermoplastic polymers. Specifically it relates to a process for the
preparation of a substantially linear, high molecular weight phenoxy
resin from hydroquinone, optionally up to about 20 mole percent of a
second aromatic diol, epichlorohydrin (or another epihalohydrin) and a
base, such as sodium hydroxide. Hydroquinone phenoxy resin is
characterized by low permeability to oxygen and carbon dioxide and is,
therefore, useful as a gas-barrier layer in multilayer plastic film
constructions used in food-packaging and beverage bottle applications,
for example. For use in such applications, the resin is generally in
the form of a thin, uniform film prepared by extrusion, casting, or
other such method. It is highly desirable that polymers used in this
manner be as free as possible from chain branches or crosslinks, as
these lead to the formation of gel particles which cause imperfections
in the polymer film. These imperfections, in turn, detract from the
appearance of the film. Moreover, as is well known, increasing the
amount of chain branching in a polymer results in a undesirable
reduction of flexibility and toughness.

INVENTORS:
Olsen, Eric Gray
Jackson Jr., Winston Jerome

APPLICATION NUMBER: EP19800401874
PUBLICATION DATE: 08/05/1981
FILING DATE: 12/29/1980

ASSIGNEE: EASTMAN KODAK CO (US)
INTERNATIONAL CLASSES: C08G65/00; C08G65/26; (IPC1-7): C08G59/06; C08G65/40; C08L67/02;
B32B27/08
EUROPEAN CLASSES: C08G65/26C1R

FOREIGN REFERENCES:
4122067 Process of reacting a polyepoxide compound with a phenol in
  aqueous medium
3294747 Method for producing thermoplastic polyhydroxyether
DE1694296B
3767618
3238087 Method of making laminated structural elements and article
  produced thereby

OTHER REFERENCES:
ENCYCLOPEDIA OF POLYMER SCIENCE AND TECHNOLOGY, Vol. 10, 1969,