Patent · US Active

Vinyl ester/ethylene copolymer dispersions for use in adhesive formulations

US9006329B2 · kind B2 · utility

1Cited by

6References

14Claims

0Family size

Assignee

Celanese Emulsions GmbH · DE

Inventors

Jorg Schulte · Frankfurt, DE
Alexander Madl · Frankfurt am Main, DE
Hans Uwe Faust · Aachen, DE

Key dates

Filing date	Jun 7, 2012
Grant date	Apr 14, 2015
Priority date	—
Expiry date	Feb 18, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/03
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An aqueous dispersion of a vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene and a polyvinyl alcohol stabilizing system consisting essentially of (a) about 0.5 to about 3 wt. % based on the total monomer weight of a first polyvinyl alcohol having a degree of hydrolysis of at least 98 mole % and (b) about 1 to about 4 wt. % based on the total monomer weight of a second polyvinyl alcohol having a degree of hydrolysis of about 85 to about 90 mole % and a weight average molecular weight of at least 85,000 g/mol.

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