Abstract
Continuously the papars on “ring-shaped phenol novolak” are abstracted. [1]H. v. Euler et al (1941), [2] A. Zinke et al (1941, 1944, 1948, 1952), [3] H. Kämmerer et al (1959, 1952-1962), [4] K. Hultzsch (1962), [5]After 1970 : H. Erdtman, S. Högberg (1968), J. W. Cornforth et al (1973), Kämmerer et al (1972, 1975, 1978), B. Patrick, P. A. Egan (1977), C. D. Gutsche, R. Muthukrishnan (1978). In conclusion, the presen author pointed out that one must take care of that the crystalline compounds obtained from alkylphenol and formaldehyde have not always a single structure and molecularweight.
