Process for continuous controlled alcoholysis of polyvinyl aceta

Details Process for continuous controlled alcoholysis of polyvinyl aceta Process for continuous controlled alcoholysis of polyvinyl aceta

1980-12-12

1982-07-06

Levin, Stanford M.

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

Synthetic resins

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

525 56, 525 60, C08F 812

Patent

active

043384056

ABSTRACT:
Improved process for the preparation of partially alcoholyzed polyvinyl acetate having good compositional uniformity comprises rapid premixing of the polyvinyl acetate polymer and base catalyst solutions in a static mixer and carrying out the alcoholysis reaction in an intermeshing, self-wiping, twin-rotor mixer or mixing extruder. The process yields polyvinyl alcohol product having a maximum hot water insoluble fraction of about 1.1% by weight obtained by the proper adjustment of the feed temperature, the shear rate in the premixer and the catalyst concentration in the catalyst feed solution.

REFERENCES:
patent: 2642419 (1953-06-01), Waugh et al.
patent: 2643994 (1953-06-01), Germain
patent: 3072624 (1963-01-01), Akaboshi et al.
patent: 3300460 (1967-01-01), Vacca
patent: 3386981 (1968-06-01), Akaboshi et al.
patent: 3471131 (1969-10-01), Fritzweiler et al.

Affiliated with

Also associated with

Rating

Process for continuous controlled alcoholysis of polyvinyl aceta 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 continuous controlled alcoholysis of polyvinyl aceta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for continuous controlled alcoholysis of polyvinyl aceta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2169259