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8748758 
Journal Article 
Petroleum Resino 
Hayashi, H 
1978 
1 
Yuki Gosei Kagaku Kyokaishi
ISSN: 0037-9980 
36 
6 
533-538 
English 
The petroleum resins comprise a class of synthetic polymeric hydrocarbon products derived from a variable mixture of unsaturated monomers obtained as volatile by—products, mainly C5 and C9 fractions, in the cracking of natural gas or petroleum naphthas. Petroleum resins are produced by polymerizing cationically by Friedel—Crafts catalysts. In the world, the production capacity of petroleum resins is now about 630,000 tonnes/year, and that the petroleum resins have rapidly become the resin of choise in any areas—paints, printing inks, rubber compounds and adhesives. Petroleum resins can still be regarded as new materials-they are capable of wide development and refinement with close tailoring of properties to meet the need of any application. This review will refer to the present state of petroleum resin industry-various raw materials, polymerization conditions, catalysts, catalyst removals and modification of petroleum resins. © 1978, The Society of Synthetic Organic Chemistry, Japan. All rights reserved.