A method of preparing a superabsorbent polymer, which enables the preparation of the superabsorbent polymer exhibiting an improved absorption rate while maintaining excellent absorption performances is provided. The method of preparing the superabsorbent polymer includes carrying out a crosslinking polymerization of a water-soluble ethylene-based unsaturated monomer having acidic groups which are at least partially neutralized, in the presence of an internal crosslinking agent having a predetermined chemical structure to form a water-containing gel polymer, gel-pulverizing the water-containing gel polymer, drying, pulverizing, and size-sorting the gel-pulverized water-containing gel polymer to form a base polymer powder, and carrying out a surface crosslinking of the base polymer powder by a heat treatment in the presence of a surface crosslinking agent, wherein the gel-pulverizing is carried out by extruding the water-containing gel polymer through a porous plate having a plurality of holes using a screw extruder mounted inside a cylindrical pulverizer under a condition that a chopping index is 28 (/s) or more.

A method of thickening cosmetics containing a crosslinked water-swellable polymer, or a microgel obtained by pulverizing a hydrophilic compound having gelation ability. The method comprises adding a linear polyacrylic acid or a salt thereof, or a linear poly(2-acrylamido-2-methylpropanesulfonic acid) or a salt thereof, having a weight-average molecular weight of 500,000 to 8,000,000, which has a thread length of 10 mm or less at room temperature when formed into a 1% by mass solution. The method provides cosmetics having an improved viscoelastic ratio, with a rich and full-bodied feeling upon application.

A method of thickening cosmetics containing a crosslinked water-swellable polymer, or a microgel obtained by pulverizing a hydrophilic compound having gelation ability. The method comprises adding a linear polyacrylic acid or a salt thereof, or a linear poly(2-acrylamido-2-methylpropanesulfonic acid) or a salt thereof, having a weight-average molecular weight of 500,000 to 8,000,000, which has a thread length of 10 mm or less at room temperature when formed into a 1% by mass solution. The method provides cosmetics having an improved viscoelastic ratio, with a rich and full-bodied feeling upon application.

The invention relates to a crosslinking compound of formula (I) ##STR00001##
In particular, the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one crosslinking compound of formula (I). This liquid composition may be used in the form of a syrup and in particular in the form of a syrup for impregnating fibers or fibrous material. The invention also relates to a pseudo-thermoplastic material obtained after polymerization of the liquid composition being at least partially crosslinked. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a long-fiber fibrous substrate with said liquid composition. The invention also relates to a fibrous substrate impregnated with said liquid composition which is useful for manufacturing composite parts. The present invention also relates to a process for manufacturing mechanical parts or structural elements made of composite material and to mechanical parts or structural elements made of composite material obtained via a process using such a liquid composition.

The invention relates to a crosslinking compound of formula (I) ##STR00001##
In particular, the present invention relates to a liquid composition comprising a monomer, a (meth)acrylic polymer and at least one crosslinking compound of formula (I). This liquid composition may be used in the form of a syrup and in particular in the form of a syrup for impregnating fibers or fibrous material. The invention also relates to a pseudo-thermoplastic material obtained after polymerization of the liquid composition being at least partially crosslinked. The invention also relates to a process for manufacturing such a liquid composition. The invention also relates to a process for impregnating a long-fiber fibrous substrate with said liquid composition. The invention also relates to a fibrous substrate impregnated with said liquid composition which is useful for manufacturing composite parts. The present invention also relates to a process for manufacturing mechanical parts or structural elements made of composite material and to mechanical parts or structural elements made of composite material obtained via a process using such a liquid composition.

The present invention relates to a super absorbent polymer and a manufacturing method thereof. More particularly, the present invention relates to a manufacturing a fine powder reassembly in which excellent physical properties are maintained.

The present invention relates to a super absorbent polymer and a manufacturing method thereof. More particularly, the present invention relates to a manufacturing a fine powder reassembly in which excellent physical properties are maintained.

This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (ERA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-EHA), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.

This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (ERA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-EHA), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.

A resin emulsion to be used in a water-based ink, wherein the resin emulsion for a water-based ink is characterized by containing emulsion particles and a carboxylic acid polymer non-metal salt and by the emulsion particles containing a polymer comprising a monomer component including a nitrogen atom-containing monomer; and a resin emulsion for a water-based ink that can be used suitably in the water-based ink and a method for producing the same.