Method for the production of hydrocarbon resins

Details Method for the production of hydrocarbon resins Method for the production of hydrocarbon resins

1981-04-15

1982-11-02

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526290, C08F 200, C08F11000

Patent

active

043574505

ABSTRACT:
In a method for the production of hydrocarbon resins based upon pyrolysates through cationic polymerization of the pyrolyzate in the presence of Friedel-Crafts catalysts and solvents at temperatures between -40.degree. and +60.degree. C., tetralin and/or tetralin derivatives are pyrolysed at 660.degree.-710.degree. C., preferably at 675.degree.-690.degree. C., in the presence of 1-10 mol, preferably 3-7 mol, vaporous water per mole tetralin or tetralin derivative with a dwell time of 1-2 seconds; the pyrolyzate is distilled to free it of high boiling (tarry) portions; and the unsaturated compounds contained in the distillate are polymerized in known manner. Styrene formed during the pyrolysis is preferably removed through distillation before the polymerization. The hydrocarbon mixture regenerated with the separation of the resins formed through polymerization are hydrogenated to tetralin and/or tetralin derivatives and again pyrolyzed.

REFERENCES:
patent: 3040009 (1962-06-01), Wadsworth et al.

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