Method of producing novolak resin

Details Method of producing novolak resin Method of producing novolak resin

2005-08-30

2005-08-30

Truong, Duc (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S144000, C528S486000, C528S50200C, C528S503000

Reexamination Certificate

active

06936680

ABSTRACT:
Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.

REFERENCES:
patent: 6045966 (2000-04-01), Rahman et al.
patent: 6121412 (2000-09-01), Wanat et al.
patent: 2000-264941 (2000-09-01), None
Casiraghi, Giovanni, et al., Uncatalysed Phenol-Formaldehyde Reactions—A Convenient Synthesis of All-ortho Novolac Resins, Makromol. Chem., 1981, 2973-2979, 182.

Affiliated with

Also associated with

Rating

Method of producing novolak resin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing novolak resin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing novolak resin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3510452