Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1988-10-27
1989-12-12
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
526227, 526232, 526271, 526272, C08F 812
Patent
active
048868590
ABSTRACT:
Slightly crosslinked, water-soluble polymaleic acid which is obtainable by polymerization of maleic anhydride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60.degree. to 200.degree. C. in the presence of from 1 to 20% by weight, based on maleic anhydride, of a peroxyester, and hydrolysis of the polymer to give slightly crosslinked polymaleic acid having a Fikentscher K value of from 8 to 20 (measured at 20.degree. C. in 5% strength aqueous solution at pH 7 as the Na salt), a process for the preparation of slightly crosslinked polymaleic acid, and its use as a water treatment agent for reducing boiler scale and hard water deposits in water-conveying systems.
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Denzinger Walter
Gockel Ulrich
Hartmann Heinrich
Raubenheimer Hans-Jurgen
Richter Felix
BASF - Aktiengesellschaft
Conger William G.
Demeter John C.
Reddick J. M.
Schofer Joseph L.
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