Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1977-11-29
1979-06-05
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
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.
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Bock Jan
Lundberg Robert D.
Makowski Henry S.
Zawadski Thomas
Exxon Research & Engineering Co.
Jacobs Lewis T.
Nanfeldt Richard E.
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