BLENDS OF POLYURETHANE DISPERSIONS WITH LATEX EMULSIONS FOR BOOKBINDING

摘要

A method of binding book blocks to form books is disclosed. The method involves applying an aqueous composition to the spine area of a book block and removing the volatile components of the compositi on. The composition comprises (1) an aqueous vehicle, a film-forming polymeric resin, and a polyurethane resin or (2) an aque ous polyurethane dispersion or emulsion. The composition may also include an alkaline component. In another embodiment, the c omposition comprises a mixture of an aqueous, film-forming polymeric latex, an alkaline component to adjust the pH of the latex to that of an aqueous polyurethane dispersion, and the aqueous polyurethane dispersion.