NATURAL OCCURRING THERMOPLASTIC RESINS AS A SUBSTITUTE FOR VARIOUS PETROLEUM-DERIVED COMPOUNDS IN RUBBER STOCKS

摘要

ABSTRACT OF THE DISCLOSURE:Natural occurring thermoplastic resins are usedas a substitute for process oils and/or hydrocarbon resins,as well as for tackifiers, softeners, extenders, processingaids, and cure retarders, in rubber stocks, as for example,a rubber skim stock used in making a tire. The resins,which are derived from crude wood rosin, are high meltingthermoplastic resins having carboxylic acid groups and areinsoluble in aliphatic hydrocarbons. The source of thenatural occurring resins is in ample supply as they areobtained from pine trees grown in North America.