A process for preparation of a polymer product comprising the steps of i) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of monoethylenically unsaturated monomers into a first reactor device (2) through at least one inlet; ii) partially polymerizing the monomer or monomers and transferring the polymerizing monomer or mixture of monomers from the inlet to an outlet (3) of the first reactor device (2) to provide a partially polymerized product; iii) flowing the partially polymerized product out of the outlet (3), in which no more than 60% of the monomer or mixture of monomers has been polymerized in the partially polymerized product as it exits the outlet (3) of first reactor device (2), and transferring it to a further reactor device (5), in which the further reactor device (5) has an inlet and an outlet (6);
iv) continuing the polymerization in the further reactor device (5) and removing the polymer product from the outlet (6) of the further reactor device (5),
characterized in that the first reactor device (2) comprises a positive displacement pump.

The present disclosure provides ink-jet inks and associated methods. In one example, an ink jet ink can comprise an ink vehicle, a wax emulsion, and a latex particulate. The latex particulate can comprise multiple intermingled discrete polymer strands, including: a low Tg polymer strand having a Tg below 50° C. and a high Tg polymer strand having a Tg at 50° C. or above. Additionally, the Tg of the high Tg polymer strand can be at least 50° C. greater than the Tg of the low Tg polymer strand.

A method for producing an ethylene-acrylic acid copolymer may minimize the neck-in phenomenon of the strand by discharging the copolymer strand by controlling the discharging temperature of the produced copolymer to be 200 to 300° C., has excellent workability, processability, and moldability, and melt index (MI) is easy to control. In addition, the ethylene-acrylic acid copolymer produced by this method has the effect of having high melt tension.

A method for producing an ethylene-acrylic acid copolymer may minimize the neck-in phenomenon of the strand by discharging the copolymer strand by controlling the discharging temperature of the produced copolymer to be 200 to 300° C., has excellent workability, processability, and moldability, and melt index (MI) is easy to control. In addition, the ethylene-acrylic acid copolymer produced by this method has the effect of having high melt tension.

Disclosed herein are highly active dilithio initiators prepared from high molecular weight dienes (C≧6) and methods for the preparation of such compounds. These dilithio initiators result in greater control over polymer microstructure and provide useful polymers and oligomers with low vinyl incorporation.

Water absorbent polymers and a process for their preparation are disclosed. The process for preparing water absorbent polymers comprises preparing a slurry with relatively high amounts of polymer particles (in the range of 40 to 55 wt % of the total mass of the slurry) having water absorbed therein. The slurry is then directly spray dried to obtain water absorbent polymers.

The present invention relates to a reactor system for a multimodal polyethylene polymerization process, comprising; (a) a first reactor; (b) a hydrogen removal unit arranged between the first reactor and a second reactor comprising at least one vessel connected with a depressurization equipment, preferably selected from vacuum pump, compressor, blower, ejector or a combination thereof, the depressurization equipment allowing to adjust an operating pressure to a pressure in a range of 100-200 kPa (abs); (c) the second reactor; and (d) a third reactor and use thereof as a sheet.

Disclosed herein are compositions and methods for preventing or treating acute or chronic oral mucositis, esophagitis, enteritis, colitis, or gastrointestinal acute radiation syndrome (GI-ARS) caused by radiation exposure, using one or more enteron sorbent polymers administered gastrointestinally (e.g. orally, via feeding or gastric tube, via ostomy, or rectally).

Disclosed herein are compositions and methods for preventing or treating acute or chronic oral mucositis, esophagitis, enteritis, colitis, or gastrointestinal acute radiation syndrome (GI-ARS) caused by radiation exposure, using one or more enteron sorbent polymers administered gastrointestinally (e.g. orally, via feeding or gastric tube, via ostomy, or rectally).

The present invention relates to a polyethylene resin suitable for preparing moulded articles, such as caps and closures. The invention provides in particular a polyethylene resin comprising at least two polyethylene fractions A and B, wherein said polyethylene resin has a melt index (MI2), of at least 3.0 g/10 min to at most 5.5 g/10 min as measured according to ISO 1133, condition D, at 190° C. and under a load of 2.16 kg, and a density of at least 0.955 g/cm.sup.3 to at most 0.965 g/cm.sup.3 as measured according to ISO 1183 at 23° C., and a molecular weight distribution M.sub.w/M.sub.n which is at most 7.0, as determined by gel permeation chromatography, with M.sub.w being the weight-average molecular weight and M.sub.n being the number-average molecular weight; and wherein said polyethylene fraction A has a high load melt index (HLMI), as measured according to ISO 1133:1997 condition G at 190° C. and under a load of 21.6 kg, of at least 10.5 and a melt index (MI2) of at least 0.5 g/10 min to at most 1.5 g/10 min as measured according to ISO 1133, condition D, at 190° C. and under a load of 2.16 kg. The invention further relates to a process for preparing said polyethylene resin, to a cap or closure comprising said polyethylene, and to a process for producing such a cap or closure.