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.

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.

An anti-fog material comprising a zwitterionic-doped hydrogel made up of charged monomers, at least a portion of which comprise zwitterionic monomers, uncharged hydrophilic monomers, and at least one crosslinking agent is disclosed. A composition for forming the hydrogel and a transparent, removable article comprising the anti-fog material are also disclosed. The article, which may be in the form of a film or decal, may comprise an active layer attached to a backing layer, the active layer comprising an anti-fog material described herein. A method of making a surface of a substrate resistant to fogging by applying the transparent and removable article thereto is also disclosed.

An anti-fog material comprising a zwitterionic-doped hydrogel made up of charged monomers, at least a portion of which comprise zwitterionic monomers, uncharged hydrophilic monomers, and at least one crosslinking agent is disclosed. A composition for forming the hydrogel and a transparent, removable article comprising the anti-fog material are also disclosed. The article, which may be in the form of a film or decal, may comprise an active layer attached to a backing layer, the active layer comprising an anti-fog material described herein. A method of making a surface of a substrate resistant to fogging by applying the transparent and removable article thereto is also disclosed.

A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer selected from the group consisting of xanthan gum, carrageenan, guar gum, chitosan, alginate and combinations thereof; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising up to 100 mol-% repeating units according to Formula (1a): ##STR00001##
wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.

A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer selected from the group consisting of xanthan gum, carrageenan, guar gum, chitosan, alginate and combinations thereof; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising up to 100 mol-% repeating units according to Formula (1a): ##STR00001##
wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.

This invention concerns a transparent composition comprising at least a first amphoteric water-soluble polymer, which comprises: A units of a cationic monomer selected from: acidified or quaternised dimethylaminoethyl acrylate salts, acidified or quaternised dimethylaminoethyl methacrylate salts, acidified or quaternised dimethylaminopropyl acrylamide salts, and acidified or quaternised dimethylaminopropyl methacrylamide salts, and mixtures thereof; B units of 2-acrylamido-2-methylpropanesulphonic acid and/or salts thereof; and optionally C units of acrylamide,

characterised in that the molar ratio between the A units of cationic monomer and the B units of 2-acrylamido-2-methylpropanesulphonic acid and/or salts thereof is between 0.4 and 1.4.

This invention concerns a transparent composition comprising at least a first amphoteric water-soluble polymer, which comprises: A units of a cationic monomer selected from: acidified or quaternised dimethylaminoethyl acrylate salts, acidified or quaternised dimethylaminoethyl methacrylate salts, acidified or quaternised dimethylaminopropyl acrylamide salts, and acidified or quaternised dimethylaminopropyl methacrylamide salts, and mixtures thereof; B units of 2-acrylamido-2-methylpropanesulphonic acid and/or salts thereof; and optionally C units of acrylamide,

characterised in that the molar ratio between the A units of cationic monomer and the B units of 2-acrylamido-2-methylpropanesulphonic acid and/or salts thereof is between 0.4 and 1.4.

The present disclosure provides a light curing non-transparent material for 3D printing and a preparation method thereof, a 3D printed product and a 3D printer. The light curing non-transparent material for 3D printing provided by the present disclosure can be used to print non-transparent 3D printed products without adding white pigments such as white pigments powder, and therefore has the characteristic of high stability, and also ensures fluency of the 3D printing process, good quality of the 3D printed products, as well as good performances of the 3D printer that containing light curing non-transparent material for 3D printing.

The present disclosure provides a light curing non-transparent material for 3D printing and a preparation method thereof, a 3D printed product and a 3D printer. The light curing non-transparent material for 3D printing provided by the present disclosure can be used to print non-transparent 3D printed products without adding white pigments such as white pigments powder, and therefore has the characteristic of high stability, and also ensures fluency of the 3D printing process, good quality of the 3D printed products, as well as good performances of the 3D printer that containing light curing non-transparent material for 3D printing.