Patent · US Expired

Photopolymerizable compositions based on acrylic or methacrylic acid esters containing organic phosphites

US4189365A · kind A · utility

26Cited by

3References

10Claims

0Family size

Assignee

ESPE Fabrik Pharmazeutischer Praparate GmbH · DE

Inventors

Werner Schmitt · Starnberg, DE
Robert Purrmann · Starnberg, DE
Peter Jochum · Meiningen, AT

Key dates

Filing date	Mar 15, 1978
Grant date	Feb 19, 1980
Priority date	—
Expiry date	Mar 15, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2/50
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An improved photopolymerizable composition based on acrylic or methacrylic acid esters is disclosed. In addition to the mono- or polyfunctional acrylic or methacrylic acid ester compounds, an aliphatic, aromatic or mixed aliphatic-aromatic organic phosphite compound (in an amount of from about 0.1 to 20 percent by weight of the photopolymerizable ester compounds) and a monoketal of an aromatic 1,2-diketone compound (e.g., benzildimethylketal) are included as ultraviolet initiators to dramatically reduce the polymerization time of the composition without adversely affecting its stability.

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