Phenol resin composition and method of producing phenol resin

Details Phenol resin composition and method of producing phenol resin Phenol resin composition and method of producing phenol resin

1998-05-08

1999-09-14

Krass, Frederick

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 98, 528 99, 528149, 528152, 528159, 525489, 525490, 525502, 525504, C08G 1410, C08L 6134

Patent

active

059524472

ABSTRACT:
Disclosed is a phenol resin composition containing a specific triazines-modified novolak phenol resin comprising phenols, triazines and aldehydes, and a method for producing the triazines-modified novolak phenol resin comprising the steps of as a first step reaction, successively effecting processes (i), (ii) and (iii), wherein said process (i) is a process for adjusting a pH of a system of a mixture of phenols, triazines and aldehydes in a range of 5 to 10, said process (ii) is a process for reacting said mixture under the condition that the aldehydes are not volatilized and said process (iii) is a process for removing a reaction water in the system; then as a second step reaction, successively effecting said processes (ii) and (iii) at a higher temperature than that of the first step reaction; thereafter as a third step reaction, successively effecting said processes (ii) and (iii) at a higher temperature than that of the second step reaction; and further, depending upon a necessity, repeating the second step reaction and the third step reaction, whereby a dimethylene ether bond in the molecule is converted to a methylene bond.

REFERENCES:
patent: 2826559 (1958-03-01), Updegraff et al.

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