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Aromatic hydrocarbon resins AHRs

Aromatic hydrocarbon resins (AHRs) were mentioned as early as the 1930s and were initially obtained from raw materials of carbochemical origin. Later, AHRs were obtained from raw materials from petrochemistry [105-107]. Several thousand tons of AHRs are marketed per year, divided into two subgroups copolymeric AHRs and homopolymeric AHRs. The first subgroup dominates in importance and is made up of indene-coumarone resins (of carbochemical origin) [108—112] and of indene or styrene-indene resins (of petrochemical origin) [113—116]. [Pg.192]

The interest in homopolymeric AHRs is growing, since the use of pure monomers allows one to achieve some colorless products with certain higher-performance qualities (increased softening temperature, reactivity, etc.). Styrene homooligomers can be obtained from pure styrene or from styrene concentrates by cationic oligomerization. Styrene co-oligomers can be obtained from styrene and a-methylstyrene, vinyltoluene, cyclopentadiene, or vinylic ethers by cationic oligomerization [113,117—120]. [Pg.192]

High-temperature oligophenilenes are obtained in the presence of a titanium—aluminum catalyst, conveniently expressed by the generic formula TiCV A1(C2H5)2C1, by the following reactions [121-125]  [Pg.192]

Oligophenylenes with oxymethylenic groups were prepared in the presence of P(CeH,)32 or Ni(CO)2 by the following reactions [126]  [Pg.193]

Metal-containing oligophenylenes soluble in aromatic hydrocarbons were prepared by treating oligomers containing (X) (CH2) with Na or K in a hydrocarbon medium, where [Pg.193]


See other pages where Aromatic hydrocarbon resins AHRs is mentioned: [Pg.192]    [Pg.192]   


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