Alliedsignal Inc.

Darryl K Barnes

George David Green

Stephen A Munk

James R Snyder

Eugene V Sitzmann

Mathias P Koljack

Lidia T Calcaterra

Stephen C Lapin

Russell F Anderson

Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives.

Increasing the useful range of cationic photoinitiators in

Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.

Stereolithography using vinyl ether-epoxide polymers

Vinyl ether terminated ester oligomers having a range of molecular weights are prepared by reacting a vinyl ether terminated polybasic ester with a polyol in the presence of a catalyst. Continual removal of a hydroxy monovinyl ether avoids formation compounds containing acetal moieties. Alternatively, a polybasic ester is chain extended with a polyol with continual removal of the alcohol by-product. Then, the terminal ester moieties are end capped with a monohydroxy vinyl ether. The oligomers have application in coatings and the like.

Preparation of vinyl ether terminated polyesters

The stain resistance of nylon fibers is improved by attaching stainblocking compounds to the fiber surface using agents which have been grafted to the nylon using UV light and a photoactivator.

Activation of nylon fibers for modification by UV radiation

The present invention relates to non-halogenated hydrocarbon polymeric compositions which impart durable stain resistance to fibrous substrates, particularly nylon containing articles. In addition, it relates to fluorine containing polymeric compositions which impart durable stain resistance to fibrous substrates as above. It relates also to processes in which such substrates are treated so as to impart durable stain resistance to them. It relates further to a manufacturing process for preparing the compositions of the invention.

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Bellwood, IL, United States of America

Darryl K Barnes