STUDIES ON THE HEAT RESISTANCE OF RAYON TIRE CORD:(II) FINISHING WITH THE AMINOCARBONIC ACID TYPE AMPHOTERIC SURFACTANTS
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The effects of the aminocarbonic acid type amphoteric surfactants on the properties of rayon tire cord, such as cord strength yield, water pick up and heat resistance, have been investigated and the relation between the chemical structures and the properties of the surfactants, as follows, is discussed. a) Betaine type b) Monoaminopropionic acid type c) Polyaminoacetic acid type d) Polyaminopropionic acid type e) Polyamidocarbonic acid typeAs the results, it was found that the heat resistance of cord finished with all types of these amphoteric surfactants is improved but the water pick up of the finished cord is generally low.The cord strength yield is improved by the increase of the alkyl chain length of the surfactant.
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