Patent · US Expired

Polyvinyl acetals and their use

US5019624A · kind A · utility

7Cited by

0References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Matthias Gutweiler · Taunusstein, DE
Robert K. Driscoll · Frankfurt am Main, DE
Ernst I. Leupold · Neu-Anspach, DE

Key dates

Filing date	Apr 23, 1990
Grant date	May 28, 1991
Priority date	—
Expiry date	Apr 23, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F8/28
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Acetals of polyvinyl alcohol are described in which at least some of the acetal groups are derived from terminally etherified oxyethylene aldehydes/oxaalkanals of the formula ##STR1## The new acetals are internally plasticized and can be processed thermoplastically without external plasticizers. Depending on the nature of the radical R, which can be aliphatic, cycloaliphatic or aromatic, and the size of n, an integer, preferably 1 to 3, and, on the nature of other aldehydes which may be co-used for mixed acetalation, the new acetals are soluble in water or organic solvents.

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