Bulk sulfonation process

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

260DIG31, 526 40, C08F 834, C08C 1920

Patent

active

041574320

ABSTRACT:
A bulk sulfonation process for the preparation of sulfonated polymers from hydrocarbon polymers having olefinic unsaturation or aromatic moieties, or both, includes intimately mixing the polymer by mechanical means in the absence of a solvent for the polymers with a sulfonation reagent at a sufficient temperature and time to effect the desired degree of sulfonation. The sulfonated polymer may be recovered as the free sulfonic acid or neutralized ionically with a basic compound. Sulfonated polymers including a substantial proportion of aromatic moieties yield water-soluble or water-dispersible salts, useful as thickening and flocculating agents, when neutralized with ammonia monobasic cations or lower alkyl amines. These materials, however, when sulfonated at a low level, e.g. <10 mole SO.sub.3 per mole aromatic, behave like water insensitive thermoplastics. Sulfonated elastomeric polymers yield thermoplastic elastomers which can be extruded, blow molded, injection molded and have utility as general purpose rubbers when neutralized with polyvalent cations or polyamines.

REFERENCES:
patent: 2691644 (1954-10-01), Roth
patent: 2945842 (1960-07-01), Eichhorn et al.
patent: 3033834 (1962-05-01), Roth
patent: 3072618 (1963-01-01), Turbak
patent: 3158583 (1964-11-01), Corte et al.
patent: 3218301 (1965-11-01), Moody et al.
patent: 3642728 (1972-02-01), Canter
patent: 3836511 (1974-09-01), O'Farrell et al.
patent: 3859264 (1975-01-01), Knudsen
patent: 3887530 (1975-06-01), O'Farrell et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Bulk sulfonation process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bulk sulfonation process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulk sulfonation process will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1708760

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.