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CONTACT ADHESIVE NANODISPERSIONS BASED ON MODIFIED POLYCHLOROPRENE WITH RESIN AND COLLAGEN HYDROLYSATES
Abstract
High performance environmentally friendly aqueous adhesive nanodispersions for shoe manufacture were obtained by improving the polychloroprene adherence by chemical grafting of polychloroprene latex DISPERCOLL C 84 with methyl methacrylate in the presence of benzoyl peroxide as initiator. Grafting is demonstrated by the absence of monomer and polmethylmethacrylate in dispersions, decreasing of intensity of some bands assigned to polychloroprene as well as broadening and splitting of its C-C stretching band due to its superposition with C-O (ester bond) stretching of polymethylmethacrylate, increase of particle size and particle size distribution due to grafts that acts as branches and changes in the film morphology from lamellar to biphasic. Peeling resistance becomes higher on grafting, increases with monomer amount and depends on the nature of substrate to which the standard rubber is bonded. It was used as adherence enhancers for polychloroprene ?? colophony resin, collagen hydrolysates and their mixture in equal amounts increase the adherence, especially for the dispersion containing non-grafted polymer, the values depending on the nature of the second substrate.
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