High molecular weight water-soluble copolymers, their...

Details High molecular weight water-soluble copolymers, their... High molecular weight water-soluble copolymers, their...

C - Chemistry, Metallurgy

08

F

31/23, 402/321,

C08F 228/02 (2006.01) C08F 220/56 (2006.01) C08F 220/58 (2006.01) C08F 226/02 (2006.01) C09K 8/588 (2006.01) C10G 1/00 (2006.01)

Patent

CA 1198548

Abstract of the Disclosure The present invention relates to the use of water-soluble copolymers which consist, in random distribution, of radicals of the formula Image (I) to the extent of 5 to 60% by weight, of radicals of the formula II Image (II) to the extent of 2 to 40% by weight, and of radicals of the formula III Image (III) to the extent of 38 to 93% by weight, and derivatives thereof which are obtainable by partial hydrolysis, in which R1 and R2 are identical or differ- ent and denote hydrogen, methyl or ethyl or, where appropriate, together de- note trimethylene, Y denotes the radical -CO-NH-C(CH3)2-CH2- or a direct bond and X+ denotes a cation, as auxilaries in the deoiling of sand and rock masses containing mineral oil. The copolymers are partially new. The pre- sent invention also relates to the new copolymers and their preparation.

381937

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