Abstract: Conveyor belt, in particular for a trough conveyor, from synthetic material e.g. polyvinyl chloride, polyolefin, polyurethane, polyester, polyether blockamide and such like, with at least one fabric embedded in it consisting of wrap and weft, the thread material of the weft (6) consisting of two or more, up to ten, monofilament threads (7). The thread material may have a twine of 40 to 80 twists/meter and a titre of 100 to 1000 dtex.

Abstract: Ethylenically unsaturated aqueous urethane dispersions of controlled molecular weight are prepared by first reacting an active hydrogen atom containing polymerizable vinyl compound with a diisocyanate to produce a monoacrylated diisocyanate adduct in the presence of excess diisocyanate.The adduct thus formed, being a nearly selectively made mono-ethylenically unsaturated mono-isocyanate compound, is used in preparing an aqueous urethane polymer dispersion by reacting this adduct with polyisocyanates, organic compounds containing active hydrogen atoms like polyols and polyamines and organic compounds containing at least one active hydrogen atom and at least one group capable of saltformation, followed by neutralizing, dispersing in water and chain-extending the prepolymer.