Patent · US Expired

Packaging materials having barrier properties against oxygen

US5624748A · kind A · utility

1Cited by

6References

9Claims

0Family size

Assignee

BASF SE

Inventors

Erich Penzel · Heidelberg, DE
Hermann Seyffer · Heidelberg, DE
Eberhard Beckmann · Neustadt, DE
Norbert Sendhoff · Havelsee, DE

Key dates

Filing date	Sep 5, 1995
Grant date	Apr 29, 1997
Priority date	—
Expiry date	Sep 5, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31895
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Packaging materials are produced by a process which comprises coating substrates suitable for packaging with an aqueous solution or emulsion which contains a copolymer A) composed of PA1 a) from 10 to 100% by weight of an ethylenically unsaturated C.sub.3 -C.sub.5 -carboxylic acid or C.sub.3 -C.sub.5 -di-carboxylic acid or anhydrides or half-esters of the dicarboxylic acids, PA1 b) from 0 to 50% by weight of an ethylenically unsaturated compound having at least one sulfo or sulfonate group and PA1 c) from 0 to 70% by weight of further monomers, and a polyester B) and, if required, then applying further top coats.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.