Methods, including a one-step synthesis method, for chemically modifying crosslinked sodium polyacrylate to form pressure sensitive adhesives are disclosed.

Self-crosslinking hydrophilic coatings and methods of forming the same are disclosed. The lubricious hydrophilic coatings may be formed on the surfaces of medical devices. The self-crosslinking hydrophilic coating formulations form a hydrophilic coating when the solvent of the hydrophilic coating formulation is dried off, or otherwise removed, from the formulation.

Self-crosslinking hydrophilic coatings and methods of forming the same are disclosed. The lubricious hydrophilic coatings may be formed on the surfaces of medical devices. The self-crosslinking hydrophilic coating formulations form a hydrophilic coating when the solvent of the hydrophilic coating formulation is dried off, or otherwise removed, from the formulation.

The present invention provides a curable composition capable of securing delayed curing time for carrying out a work such as laminating or tightening after carrying out irradiation with an energy ray or heating and capable of exhibiting delayed curing property after that, regardless of whether an adherend is transparent or not. The present invention is a curable composition comprising components (A) to (C): a component (A): a compound having a (meth)acryloyl group in a molecule; a component (B): saccharin; and a component (C): at least one of a photocationic catalyst as a component (C-1) and a thermal cationic catalyst as a component (C-2).

The present invention provides a curable composition capable of securing delayed curing time for carrying out a work such as laminating or tightening after carrying out irradiation with an energy ray or heating and capable of exhibiting delayed curing property after that, regardless of whether an adherend is transparent or not. The present invention is a curable composition comprising components (A) to (C): a component (A): a compound having a (meth)acryloyl group in a molecule; a component (B): saccharin; and a component (C): at least one of a photocationic catalyst as a component (C-1) and a thermal cationic catalyst as a component (C-2).

Provided is a water-absorbent resin which is capable of giving an absorbent material improved gel-shape stability and which has excellent water-absorption capacity. A water-absorbent resin of the present invention is a polymer of a water-soluble ethylenically unsaturated monomer, and has the following properties (1) and (2): (1) A disintegration amount at 20-fold swelling is 30% by mass or less; and (2) a solubility in physiological saline is 25% by mass or less. (Determination Method for Disintegration Amount at 20-Fold Swelling) 5 g of the water-absorbent resin is added to 100 g of physiological saline to allow the water-absorbent resin to absorb the physiological saline, thereby obtaining a gel. The obtained gel is divided approximately equally into five portions, and these portions are introduced respectively into cylindrical molds having a length of 3.6 cm and a radius of 2.8 cm and molded. The masses of the five molded cylindrical gels are measured. The heaviest and the lightest of the five gels are removed, and the remaining three gels are used as samples. A mass Wa (g) of each sample is measured. Each weighed sample is placed on the uppermost sieve of a combination of JIS standard sieves having a mesh size of 5.6 mm and a receptacle in this order and shaken for 10 minutes using a Ro-Tap shaker (rotation speed, 290 rpm; number of taps, 165 rpm). A mass Wb (g) of the gel which has passed through the sieves is measured. The disintegration amount of each sample is calculated using the following equation: Disintegration amount of sample (%)=Wb (g)/Wa (g)×100. An average of the disintegration amounts for three samples to be measured is regarded as the disintegration amount at 20-fold swelling of the water-absorbent resin.

The invention relates to a method for grinding phosphate rock in the presence of a particular anionic polymer having a molecular weight of between 1000 and 90000 g/mol, which makes it possible to control the extent (S) of the volume distribution of the particle size of obtained phosphate mineral particles. The invention also relates to a method for improving the production yield of a phosphate rock grinding method.

The invention relates to a method for grinding phosphate rock in the presence of a particular anionic polymer having a molecular weight of between 1000 and 90000 g/mol, which makes it possible to control the extent (S) of the volume distribution of the particle size of obtained phosphate mineral particles. The invention also relates to a method for improving the production yield of a phosphate rock grinding method.

High gas barrier properties can be achieved without requiring strict control for preventing entry of moisture. A coating liquid for producing a gas barrier laminate contains a carboxy group-containing polymer, polyvalent metal-containing particles, a surfactant, and an organic solvent. In the coating liquid, the carboxy group-containing polymer has a number average molecular weight of 100,000 or less.

A composition for stabilizing iron compounds in an aqueous environment, includes a polycarboxylic acid or its salt(s), at least one monomeric or polymeric phosphonate including at least one phosphonic acid group, or its salt(s), at least one corrosion inhibitor including amino groups, and 1-15 weight-% of polycitric acid or a copolymer of citric acid with polyols or glycerol, calculated as an active ingredient from a total weight of constituents in the composition, as dry.