Isomerized terpene tackifier resins

Details Isomerized terpene tackifier resins Isomerized terpene tackifier resins

1988-08-15

1989-11-07

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525356, 528481, 528490, C08F 800

Patent

active

048793515

ABSTRACT:
A novel copolymer resin which has excellent tackifying properties for selected elastomers useful in hot melt and pressure sensitive adhesives is produced by the copolymerization of beta-pinene with other terpenes or hydrocarbon monomers, followed by thermal catalytic isomerization of the resin produced. Typically, beta-pinene and styrene (80/20) are copolymerized at a temperature between 0.degree. to 60.degree. C. under anhydrous conditions with a Lewis acid catalyst in a solvent. After catalyst removal, the copolymer resin is isomerized with iodine as a catalyst at a temperature between 200.degree. to 260.degree. C. Excellent yields of high softening point tackifier resins are produced.

REFERENCES:
patent: 3780124 (1973-12-01), Davis
patent: 4080320 (1978-03-01), Schluenz et al.
patent: 4377510 (1983-03-01), Ruckel et al.
patent: 4447354 (1984-05-01), Scharrer et al.

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