New compositions of tissue-equivalent three-dimensional polymer gel dosimeters based on acrylamide (AAm), N-isopropylacrylamide (NIPAM), N-(Hydroxymethyl)acrylamide (NHMA), diacetone acrylamide (DAAM) and N-Vinylcaprolactam (NVCL) monomer with ethylene glycol co-solvent have been introduced in this invention for radiotherapy dosimetry. The dosimeter was irradiated with 6 and 15 MV linear accelerator at absorbed doses up to 10 Gy. The nuclear magnetic resonance (NMR) spin-spin relaxation rate (R.sub.2) for water proton surrounding polymer formation was used to investigate the degree of polymerization of the five gels. The effect of additives, dose rate, radiation energy, stability of the polymerization after irradiation, were investigated on the dose response of the gels.

New compositions of tissue-equivalent three-dimensional polymer gel dosimeters based on acrylamide (AAm), N-isopropylacrylamide (NIPAM), N-(Hydroxymethyl)acrylamide (NHMA), diacetone acrylamide (DAAM) and N-Vinylcaprolactam (NVCL) monomer with ethylene glycol co-solvent have been introduced in this invention for radiotherapy dosimetry. The dosimeter was irradiated with 6 and 15 MV linear accelerator at absorbed doses up to 10 Gy. The nuclear magnetic resonance (NMR) spin-spin relaxation rate (R.sub.2) for water proton surrounding polymer formation was used to investigate the degree of polymerization of the five gels. The effect of additives, dose rate, radiation energy, stability of the polymerization after irradiation, were investigated on the dose response of the gels.

The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.

A curable composition comprising the components (i) 0 to 60 wt % non-ionic crosslinker(s); (ii) 20 to 85 wt % curable ionic compound(s) comprising an anionic group and at least one ethylenically unsaturated group; (iii) 15 to 45 wt % solvent(s); (iv) 0 to 10 wt % of photoinitiator(s); and (v) 2 to 45 wt % of structure modifier(s); wherein the molar ratio of component (v):(ii) is 0.25 to 0.65. The compositions are useful for preparing membranes for (reverse) electrodialysis.

A curable composition comprising the components (i) 0 to 60 wt % non-ionic crosslinker(s); (ii) 20 to 85 wt % curable ionic compound(s) comprising an anionic group and at least one ethylenically unsaturated group; (iii) 15 to 45 wt % solvent(s); (iv) 0 to 10 wt % of photoinitiator(s); and (v) 2 to 45 wt % of structure modifier(s); wherein the molar ratio of component (v):(ii) is 0.25 to 0.65. The compositions are useful for preparing membranes for (reverse) electrodialysis.

An oil-resistant agent including a graft polymer obtained by graft modification of a bio-based material with a long-chain hydrocarbon group-containing non-fluorine polymer having a long-chain hydrocarbon group having 7 to 40 carbon atoms. Also disclosed is a fiber product including the graft polymer in the oil-resistant agent and a method for producing the oil-resistant agent.

An oil-resistant agent including a graft polymer obtained by graft modification of a bio-based material with a long-chain hydrocarbon group-containing non-fluorine polymer having a long-chain hydrocarbon group having 7 to 40 carbon atoms. Also disclosed is a fiber product including the graft polymer in the oil-resistant agent and a method for producing the oil-resistant agent.

A method of manufacturing a polymerizable composition is capable of imparting antibacterial properties and the like to a cured product of polymerizable composition without deteriorating an appearance of the cured product of the polymerizable composition. The method of manufacturing a polymerizable monomer wherein a solution, that a second polymerizable monomer is dissolved in a first solvent, is dispersed in a first polymerizable monomer, includes mixing the first polymerizable monomer, the second polymerizable monomer, and the first solvent. The first polymerizable monomer is a liquid, and the second polymerizable monomer is a solid.

A method of manufacturing a polymerizable composition is capable of imparting antibacterial properties and the like to a cured product of polymerizable composition without deteriorating an appearance of the cured product of the polymerizable composition. The method of manufacturing a polymerizable monomer wherein a solution, that a second polymerizable monomer is dissolved in a first solvent, is dispersed in a first polymerizable monomer, includes mixing the first polymerizable monomer, the second polymerizable monomer, and the first solvent. The first polymerizable monomer is a liquid, and the second polymerizable monomer is a solid.

The present invention relates to the field of oil extraction. More specifically, it relates to a particular polymerization process, which provides access to formulations of polymers that may be used in particular for modifying rheology and fluid loss control during extraction operations and that have a better heat stability.