摘要:
The invention relates to copolymers which comprise, in copolymerized form, a1) 30 to 90% by weight of at least one monoethylenically unsaturated C3-C8-carboxylic acid or of an anhydride or salt thereof, a2) 3 to 60% by weight of at least one monomer comprising sulfo groups, a3) 3 to 60% by weight of at least one nonionic monomer of the formula I H2C═C(R1)(CH2)xO[R2—O]0—R3 (I) in which R1 is hydrogen or methyl, R2 are identical or different, linear or branched C2-C6-alkylene radicals which may be arranged in blocks or randomly, and R3 is hydrogen or a straight-chain or branched C1-C4-alkyl radical, x is 0, 1 or 2 and o is a natural number from 3 to 50, a4) 0 to 30% by weight of one or more further ethylenically unsaturated monomers which are polymerizable with a1), a2) and a3), where the sum of a1), a2), a3) and a4) adds up to 100% by weight.
摘要:
The invention relates to copolymers which comprise, in copolymerized form, a1) 30 to 90% by weight of at least one monoethylenically unsaturated C3-C8-carboxylic acid or of an anhydride or water-soluble salt thereof, a2) 3 to 60% by weight of at least one monomer comprising sulfo groups, a3) 3 to 60% by weight of at least one nonionic monomer of the formula (I) H2C═C(R1)COO—[R2—O]o—R3 (I) in which R1 is hydrogen or methyl, R2 are identical or different, linear or branched C2-C6-alkylene radicals which may be arranged in blocks or randomly, and R3 is hydrogen or a straight-chain or branched C1-C4-alkyl radical and o is a natural number from 3 to 50, a4) 0 to 30% by weight of one or more further ethylenically unsaturated monomers which are polymerizable with a1), a2) and a3), where the sum of a1), a2), a3) and a4) adds up to 100% by weight.
摘要:
The invention relates to copolymers which comprise, in copolymerized form, a1) 30 to 90% by weight of at least one monoethylenically unsaturated C3-C8-carboxylic acid or of an anhydride or water-soluble salt thereof, a2) 3 to 60% by weight of at least one monomer comprising sulfo groups, a3) 3 to 60% by weight of at least one nonionic monomer of the formula (I) H2C═C(R1)COO—[R2—O]o—R3 (I) in which R1 is hydrogen or methyl, R2 are identical or different, linear or branched C2-C6-alkylene radicals which may be arranged in blocks or randomly, and R3 is hydrogen or a straight-chain or branched C1-C4-alkyl radical and o is a natural number from 3 to 50, a4) 0 to 30% by weight of one or more further ethylenically unsaturated monomers which are polymerizable with a1), a2) and a3), where the sum of a1), a2), a3) and a4) adds up to 100% by weight.
摘要:
A polymer mixture in solid or aqueous form includes a content of from 5 to 95% by weight of a first polymer and a content of from 5 to 95% by weight of a second polymer. The first polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 20 000 g/mol. The second polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 50 000 g/mol. The polymer mixture can inhibit precipitation and sedimentation of calcium salts and magnesium salts in water-bearing systems.
摘要:
A polymer mixture in solid or aqueous form includes a content of from 5 to 95% by weight of a first polymer and a content of from 5 to 95% by weight of a second polymer. The first polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 20 000 g/mol. The second polymer is a water-soluble or water-dispersible polymer having a weight-average molecular weight of 1000 to 50 000 g/mol. The polymer mixture can inhibit precipitation and sedimentation of calcium salts and magnesium salts in water-bearing systems.
摘要:
The invention relates to a process for preparing maleic acid-isoprenol copolymers from a) 30% to 80% by weight of maleic acid, b) 5% to 60% by weight of isoprenol, c) 0% to 30% by weight of one or more further ethylenically unsaturated monomers, which comprises polymerizing maleic acid, isoprenol and optionally the further ethylenically unsaturated monomer in the presence of a redox initiator and of a chain transfer agent at a temperature in the range from 10 to 80° C.
摘要:
The invention relates to a copolymer of (a) 5 to 40% by weight of isoprenol, (b) 5 to 93% by weight of at least one monoethylenically unsaturated C3 to C8 monocarboxylic acid, an anhydride or salt of same, (c) 2 to 90% by weight of one or more sulfonic acid group-comprising monomers.
摘要:
The invention relates to a copolymer of(a) 5 to 40% by weight of isoprenol,(b) 5 to 93% by weight of at least one monoethylenically unsaturated C3 to C8 monocarboxylic acid, an anhydride or salt of same,(c) 2 to 90% by weight of one or more sulfonic acid group-comprising monomers.