Coumarone-indene (CIR) and coumarone-indene-carbazole resins (CICR) were obtained by ionic cooligomerization based on fractions extracted from liquid products of coal coking (gasoline fractions and coal tar). CIR and CICR are used as road bitumen modifiers to improve thermal resistance and adhesion. A cheap plasticizer has been selected to be used with CIR to produce polymer-modified bitumen (PMB). The change in the composition and properties of bitumen modified with CIR was described. A method for estimating the change in the adhesion properties of bitumen at low temperatures has been developed, which simulates the behavior of bitumen during the operation of pavements in winter and during sharp changes in weather conditions. The possibility of using the obtained CICR as adhesive enhancers for bitumen has been established. It is shown that the addition of these resins significantly increases the adhesion of bitumen to the surface of granite gravel and glass.
The possibility of effectively using carbazole as an improver of coumarone-indene resin for use as a modifier of petroleum bitumens is studied. All starting materials for the production of coumarone-indene-carbazole resin (CICR) were obtained from various products of the coal coking process. The influence of raw material composition (amount of carbazole added to an industrial indene-coumarone fraction) on resin yield and its modifying properties was studied. The optimal amounts of carbazole in the raw material were established, and it is recommended to use CICR as an adhesive additive to bitumen.
A narrow coumarone-indene fraction was obtained from liquid coal coking products. Based on this fraction and carbazole's presence, coumarone-indene-carbazole resin (CICR), a new type of kooligomers, was synthesized by ionic polymerization, which is proposed to be used as an adhesive modifier of road oil bitumens. The influence of temperature on the process of CICR synthesis, its quality, and characteristics of bitumen modified by it were studied.
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