Polynitrones and use thereof for cross-linking unsaturated polymers

摘要

The present invention relates to polyfunctional nitrones (optionally in the form of nitrone-terminated polymers) and to their use as crosslinking agents and matting agents, preferably for producing stable molding compounds, knifing fillers, and use thereof in inks, coatings, and adhesives. Low crosslinking temperatures characterize the invention. Through the use of polyfunctional nitrones it is possible for all unsaturated polymers to be cured, solidified and/or structured at low temperatures, preferably without use of a catalyst. Depending on the amount of nitrone-terminated polymers and/or low molecular mass polyfunctional nitrone used it is possible to exert a strong influence over the optical and the mechanical properties of the coated surfaces. By optical properties are meant, among others, the gloss of the coating systems and the surface structuring, e.g., the matte effect.

主权项

1. A method for using polynitrones for crosslinking unsaturated polymers, comprising:
(i) providing a curable composition, comprising a polynitrone, an unsaturated polymer, and optionally one or more selected from fillers and pigments; (ii) curing the composition at temperatures of 20 to 180° C.; and (iii) producing a crosslinking product;
wherein the curable composition is a 2-component system in the form of two compounds and is comprised of the polynitrone and the unsaturated polymer, and wherein the polynitrone is a compound according to formula I, wherein x is 2; R1 is wherein y is from 1 to 12; and R2 and R3 are independently selected from the group consisting of hydrogen and C1-C6 alkyl group.