Manufacture of polymerized 2,2,4-trimethyl-1,2-dihydroquinoline

Details Manufacture of polymerized 2,2,4-trimethyl-1,2-dihydroquinoline Manufacture of polymerized 2,2,4-trimethyl-1,2-dihydroquinoline

1980-07-22

1982-04-20

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546165, 546181, 260800, 524 86, C07D21506

Patent

active

043260624

ABSTRACT:
2,2,4-Trimethyl-1,2-dihydroquinoline polymer containing 25% by weight or more of the dimer is effectively prepared by the polymerization of 2,2,4-trimethyl-1,2-dihydroquinoline monomer in the presence of hydrochloric acid, the concentration of hydrochloric acid being from 15 to 25% by weight, and the amount of hydrochloric acid being 0.2 to 0.5 mole per mole of the total of the monomer and impurity amines contained in the monomer. The polymer is useful as an antioxidant for rubber.

REFERENCES:
patent: 4158000 (1979-06-01), Nagasaki et al.
Craig, J. Am. Chem. Soc., vol. 60, pp. 1458-1465 (1938).
Elliott, Jr., et al., Tetrahedron, vol. 19, pp. 833-838 (1963).

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