Described herein are compositions of hydrogels and methods of use thereof.

Described herein are compositions of hydrogels and methods of use thereof.

Described herein are compositions of hydrogels and methods of use thereof.

A composition and method directed to the formation of a biodegradable composition with enhanced mechanical properties is provided. The composition includes starch in an amount from 15-45 %, chitosan in an amount ranging from 1-50 wt%, poly acrylamide in an amount ranging from 1-10 wt %, and water in an amount ranging from 25-85 wt %. The composition can be provided for food packaging or otherwise as a protective material.

A composition and method directed to the formation of a biodegradable composition with enhanced mechanical properties is provided. The composition includes starch in an amount from 15-45 %, chitosan in an amount ranging from 1-50 wt%, poly acrylamide in an amount ranging from 1-10 wt %, and water in an amount ranging from 25-85 wt %. The composition can be provided for food packaging or otherwise as a protective material.

The invention relates to the technical field of oil and gas drilling, and discloses an amphiphilic block polymer ultralow-permeability agent and an intelligent temporary plugging type water-based drilling fluid. The ultralow-permeability agent contains a structural unit provided by styryl hydrophobic monomer, maleic anhydride and acrylamide; the drilling fluid contains two or more of water, sodium bentonite, Pac-Lv, the ultralow-permeability agent, calcium carbonate, one-way plugging agent, white asphalt and barite which are stored in a mixed manner or independently stored. When the amphiphilic block polymer provided by the invention is used as the ultralow-permeability agent of the intelligent temporary plugging type water-based drilling fluid, the self-adaptive characteristic is realized; according to the amphiphilic block polymer, temporary plugging layer gaps formed in pore and throats by plugging materials in drilling fluid can be fully filled under the condition that the sizes and the distribution of the pore and throats of reservoirs are not required to be clear, so that the permeability of temporary plugging layer is greatly reduced, ultralow-permeability is realized, and the amphiphilic block polymer is weak in tackifying effect, has gel-improving effect and can improve the rheological property of the drilling fluid.

This invention relates to a process of enhanced oil recovery by sweeping an underground formation comprising injecting into the underground formation an injection fluid comprising at least one water-soluble LCST macromonomeric polymer.

This invention relates to a process of enhanced oil recovery by sweeping an underground formation comprising injecting into the underground formation an injection fluid comprising at least one water-soluble LCST macromonomeric polymer.

A photocurable resin composition which can improve adhesion between light transmitting members. The photocurable resin composition contains a monofunctional acrylic monomer having a heating residue of 85.0% or less after being heated at 60° C. for 30 minutes, a crosslinking agent, a photopolymerization initiator, and a softening agent composed of at least one of plasticizer and tackifier, and the heating residue after being heated at 60° C. for 30 minutes is less than 96.0%.

A photocurable resin composition which can improve adhesion between light transmitting members. The photocurable resin composition contains a monofunctional acrylic monomer having a heating residue of 85.0% or less after being heated at 60° C. for 30 minutes, a crosslinking agent, a photopolymerization initiator, and a softening agent composed of at least one of plasticizer and tackifier, and the heating residue after being heated at 60° C. for 30 minutes is less than 96.0%.