| 摘要 |
The invention relates to a method for producing a comb-shaped copolymer whose skeleton is of an acrylamide, acrylic acid, acryloyl aminoethanol or dimethyl acrylamide type and on which poly(N-alkyl acrylamide) or poly(N,N-5 dialkyl acrylamide lateral segments are grafted. Said method is characterised in that it consists (a) in producing a telomer poly(N-alkyl acrylamide) or poly(N,N-dialkyl acrylamide) of formula (I) H2N—R1—Z—{CH2—C(R2)[C(=O)N(R3)(R4)]-}n—H (I) 10 by reacting in water a compound of formula (II) CH2=C(R2)—C(=O)—N(R3)(R4) (II) with a chain limiting compound of formula (III) Z—R1—NH2; (b) in isolating the telomer of formula (I) obtained at a stage (a); (c) in reacting in water the telomer of formula (I) obtained at stage (b) with an acid chloride of formula (IV) CH2=C(R5)—C(=O)—C, at a molar ratio (IV)/(III) equal to or less than 10 and equal to or greater than 1 in such a way that a macro monomer of formula (V) 20 CH2=C(R5)—C(=O)NH—R1—Z—{CH2—C(R2)[C(=O)N(R3)(R4)]-}n—H (V) is obtained; (d) in isolating the macro monomer of formula (V) obtained at stage (c); (e) in copolymerising in water the macro monomer of formula (V) isolated at stage (d) with a monomer selected from acrylamide, acrylic acid, acryloyl-aminoethanol or dimethyl-acrylamide and, if necessary, (f) in purifying the thus obtained copolymer. Method for producing a comb-shaped copolymer whose skeleton is of an acrylamide, acrylic acid, acryloyl aminoethanol or dimethyl acrylamide type and on which poly(N-alkyl acrylamide) or poly(N,N-5 dialkyl acrylamide lateral segments are grafted, includes (a) producing a telomer poly(N-alkyl acrylamide) or poly(N,N-dialkyl acrylamide) of formula (I) H2N—R1—Z—{CH2—C(R2) [C(=O)N(R3)(R4)]-}n—H (I) 10 by reacting in water a compound of formula (II) CH2=C(R2)—C(=O)—N(R3)(R4) (II) with a chain limiting compound of formula (III) Z—R1—NH2; (b) isolating the telomer of formula (I) obtained at a stage (a); (c) reacting in water the telomer of formula (I) obtained at stage (b) with an acid chloride of formula (IV) CH2=C(R5)—C(=O)—C1 at a molar ratio (IV)/(III) equal to or less than 10 and equal to or greater than 1 so that a macro monomer of formula (V) 20 CH2=C(R5)—C(=O) NH—R1—Z—{CH2—C(R2) [C(=O)N(R3) (R4)]-}n—H (V) is obtained; (d) isolating the macro monomer of formula (V) obtained at stage (c); (e) copolymerizing in water the macro monomer of formula (V) isolated at stage (d) with a monomer selected from acrylamide, acrylic acid, acryloyl-aminoethanol or dimethyl-acrylamide and, if necessary, (f) purifying the thus obtained copolymer.
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