Method of limiting rate of heat evolution during acid-catalyzed

Details Method of limiting rate of heat evolution during acid-catalyzed Method of limiting rate of heat evolution during acid-catalyzed

1983-11-21

1984-08-28

Schain, Howard E.

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

Synthetic resins

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

525480, 525481, 525503, 525507, 528150, 528151, 528153, 528154, 528155, 528165, C08L 6112, C08L 6114, C08G 820, C08G 824

Patent

active

044685076

ABSTRACT:
Large-scale preparation of branched novolacs by the acid catalyzed, exothermic condensation of methylol-reactive phenols with polymethylol diphenols is made practical by first carrying out the reaction on a scale which permits temperature control simply by cooling and then separately adding more of the premixed reactants and the catalyst at rates such that the temperature of the reaction mixture can readily be controlled.

REFERENCES:
patent: 2609352 (1952-09-01), Kvalnes
patent: 2859204 (1958-11-01), Florentine et al.
patent: 3062783 (1962-11-01), Gray et al.
patent: 4079113 (1978-03-01), Kimura et al.
patent: 4112160 (1978-09-01), Kako et al.
patent: 4256844 (1981-03-01), Martin et al.
patent: 4342852 (1982-08-01), Takeda et al.
patent: 4345054 (1982-08-01), Takeda et al.

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