Process for the preparation of novolak resins with low metal ion

Details Process for the preparation of novolak resins with low metal ion Process for the preparation of novolak resins with low metal ion

1990-07-10

1991-12-17

Kight, III, John

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

Synthetic resins

Treating polymer containing material or treating a solid...

528129, 528165, 528487, 528490, 528499, C08F 600, C08G 300

Patent

active

050736221

ABSTRACT:
The invention relates to a process for the preparation of novolak resins having a low amount of metal ions. In the process, a conventional resin in an organic solution is brought into contact with an acidic, preferably complex-forming compound which preferably is present in an aqueous phase. The resin solutions may be used in the production of photoresists.

REFERENCES:
patent: 3838102 (1974-09-01), Bennett et al.
patent: 4237265 (1980-12-01), Eliassen et al.
patent: 4965324 (1990-10-01), Bertram et al.

Affiliated with

Also associated with

Rating

Process for the preparation of novolak resins with low metal ion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of novolak resins with low metal ion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of novolak resins with low metal ion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-836273