C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 9/40 (2006.01) C02F 5/14 (2006.01) C08F 220/02 (2006.01) C08F 222/02 (2006.01) C08F 230/02 (2006.01) C11D 3/37 (2006.01)
Patent
CA 2092757
HOE 92/F 078 Abstract of the Disclosure: Alkenylaminoalkane-1,1-diphosphonic acid derivatives and copolymers thereof with unsaturated carboxylic acids The invention relates to alkenylaminoalkane-1,1-diphos- phonic acid derivatives of the formula I Image (I) in which R1 to R5, a, b, and Z have the meaning given in the description and to processes for their preparation. The invention furthermore relates to copolymers compris- ing 0.1-50 mol%, preferably 1-15 mol%, of at least one alkenylaminoalkane-l,1-diphosphonate unit of the formula I and 99.9-50 mol%, preferably 99-85 mol%, of at least one carboxylic acid unit of the formula II R6R7C = CR8Y (II) in which R6, R7, R8 and Y have the meaning given in the description and to processes for their preparation. These copolymers are used as scale inhibitors, as alkaline earth metal and heavy metal complexing agents and/or sequestering agents and as builders or co-builders in detergents.
Hoffmann Herrmann
Krull Matthias
Naumann Christoph
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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