摘要:
The present invention relates to an ethoxylated polyethylenimine polymer comprising (1) a polyethyleneimine backbone, (2) a polyoxyethylene chain wherein thepolyoxyethylene chain has an average of 40 to 90 ethyleneoxide units per unit of NH in the polyethyleneimine backbone, (3) a quaternization degree of from 1% to less than 50%.
摘要:
The invention relates to a continuous process for the preparation of amphiphilic graft polymers, wherein a vinyl ester component(B) composed of vinyl acetate and/or vinyl propionate (B1) and, if desired, a further ethylenically unsaturated monomer (B2), is polymerized in the presence of a polyalkylene oxide (A), a free radical-forming initiator (C) and, if desired, an additive(D), at a mean polymerization temperature at which the initiator (C) has a decomposition half-time of from 1to 500 min, in at least one tubular reactor segment with a feed side and an outlet side, through which the reaction mixture comprising at least a part of component (A) to (C), and if desired (D), streams. The invention further relates to an inventive amphiphilic graft polymer and the use thereof.
摘要:
The invention relates to a method for producing water-absorbing polymer particles with improved blood absorption by polymerising droplets of a monomer solution in a surrounding gaseous phase, said monomer solution containing a surfactant.
摘要:
Disclosed are vinyl lactam copolymers that are modified with polyalkylene oxide side chains, the use thereof as solubilizers for substances that are difficult to dissolve in water, and preparations containing such copolymers.
摘要:
The invention relates to the use of copolymers which comprise a) 60 to 99 % by weight of N-vinylcaprolactam; b) 1 to 40 % by weight of at least one monomer b) selected from the group including: b1) C8-C30 alkyl esters of monoethylenically unsaturated C3-C8 carboxylic acids; b2) N-alkyl- or N,N-dialkyl-substituted amides of the acrylic acid or the methacrylic acid with C8 to C30 alkyl groups; b3) the vinyl esters of aliphatically unbranched C8-C30 carboxylic acids; b4) the C8-C30 alkyl-vinyl ethers, as solubilizers for substances that are difficult to dissolve in water.