The present invention relates to a process for preparation of superabsorbent polymer with high fluid absorptivity. The present invention also relates to a composition comprising said superabsorbent polymer particles and their use for absorbing aqueous fluids, for example in the agricultural industry.

The present invention relates to a process for preparation of superabsorbent polymer with high fluid absorptivity. The present invention also relates to a composition comprising said superabsorbent polymer particles and their use for absorbing aqueous fluids, for example in the agricultural industry.

The present disclosure discloses a thermosetting starch adhesive for a wood-based panel and a preparation method therefor, and belongs to the technical field of preparation of adhesives. In the present disclosure, starch is used as a main raw material, and after acid hydrolysis thereof, a semi-continuous seed emulsion polymerization method is adopted to improve control of monomer polymerization stability. After grafting is completed, a cross-linking monomer with polymerizable double bonds and condensable methylol functional groups is added for copolymerization. The cross-linking monomer is also added in a semi-continuous manner. After the cross-linking reaction is completed, the reaction mixture is gelatinized and incubated, and finally a thermosetting adhesive which can be used for bonding of hot-pressed wood-based panels is obtained. The adhesive of the present disclosure has the properties of two-step cross-linking and high-temperature rapid cross-linking curing, good film formation, good heat resistance, and strong cohesion. With a hot-pressing process in an appropriate coating manner, appropriate temperature and pressure, the resultant wood-based panels have all their properties superior over those of Class II wood-based panels, and they can be widely used in decoration of hot-pressed woods, and bonding of wood-based panels and plywoods.

The present disclosure discloses a thermosetting starch adhesive for a wood-based panel and a preparation method therefor, and belongs to the technical field of preparation of adhesives. In the present disclosure, starch is used as a main raw material, and after acid hydrolysis thereof, a semi-continuous seed emulsion polymerization method is adopted to improve control of monomer polymerization stability. After grafting is completed, a cross-linking monomer with polymerizable double bonds and condensable methylol functional groups is added for copolymerization. The cross-linking monomer is also added in a semi-continuous manner. After the cross-linking reaction is completed, the reaction mixture is gelatinized and incubated, and finally a thermosetting adhesive which can be used for bonding of hot-pressed wood-based panels is obtained. The adhesive of the present disclosure has the properties of two-step cross-linking and high-temperature rapid cross-linking curing, good film formation, good heat resistance, and strong cohesion. With a hot-pressing process in an appropriate coating manner, appropriate temperature and pressure, the resultant wood-based panels have all their properties superior over those of Class II wood-based panels, and they can be widely used in decoration of hot-pressed woods, and bonding of wood-based panels and plywoods.

The present disclosure discloses a thermosetting starch adhesive for a wood-based panel and a preparation method therefor, and belongs to the technical field of preparation of adhesives. In the present disclosure, starch is used as a main raw material, and after acid hydrolysis thereof, a semi-continuous seed emulsion polymerization method is adopted to improve control of monomer polymerization stability. After grafting is completed, a cross-linking monomer with polymerizable double bonds and condensable methylol functional groups is added for copolymerization. The cross-linking monomer is also added in a semi-continuous manner. After the cross-linking reaction is completed, the reaction mixture is gelatinized and incubated, and finally a thermosetting adhesive which can be used for bonding of hot-pressed wood-based panels is obtained. The adhesive of the present disclosure has the properties of two-step cross-linking and high-temperature rapid cross-linking curing, good film formation, good heat resistance, and strong cohesion. With a hot-pressing process in an appropriate coating manner, appropriate temperature and pressure, the resultant wood-based panels have all their properties superior over those of Class II wood-based panels, and they can be widely used in decoration of hot-pressed woods, and bonding of wood-based panels and plywoods.

A preparation method of a crosslinking-type aqueous binder for lithium-ion batteries. An organic carboxylic group-, amino group- or hydroxyl group-containing hydrophilic polymer, and a hydroxyl group-, amine group- or carboxyl group-containing water-soluble small-molecule crosslinker, both serve as starting materials of the aqueous binder, and can be crosslinked by esterification or amidation under coating and drying conditions of lithium-ion battery electrode slurry. The preparation method of the crosslinking-type aqueous binder is simple, without the need of modifying the current process or conditions for lithium-ion battery manufacture. The obtained electrodes have excellent binding capacity, flexibility, and elasticity.

Provided is a laminate that includes a base, an organic layer, a protective layer and a photo-sensitive layer in this order, the protective layer containing a resin, the resin having a branched part and a molecular chain bonded to the branched part, the molecular chain has at least one repeating unit from among repeating units represented by any of Formula (1-1) to Formula (5-1) below, the photo-sensitive layer being intended for development with use of a developing solution, and the protective layer being intended for stripping with use of a stripping solution; a composition intended for use in forming the protective layer or the photo-sensitive layer contained in the laminate; and, a laminate forming kit intended for use in forming the laminate, in the formula, R.sup.11 represents a hydrogen atom or a methyl group, R.sup.21 represents a hydrogen atom or a methyl group, each of R.sup.31 to R.sup.33 independently represents a substituent or a hydrogen atom, each of R.sup.41 to R.sup.49 independently represents a substituent or a hydrogen atom, and each of R.sup.51 to R.sup.54 independently represents a hydrogen atom or a substituent.

##STR00001##

Provided is a laminate that includes a base, an organic layer, a protective layer and a photo-sensitive layer in this order, the protective layer containing a resin, the resin having a branched part and a molecular chain bonded to the branched part, the molecular chain has at least one repeating unit from among repeating units represented by any of Formula (1-1) to Formula (5-1) below, the photo-sensitive layer being intended for development with use of a developing solution, and the protective layer being intended for stripping with use of a stripping solution; a composition intended for use in forming the protective layer or the photo-sensitive layer contained in the laminate; and, a laminate forming kit intended for use in forming the laminate, in the formula, R.sup.11 represents a hydrogen atom or a methyl group, R.sup.21 represents a hydrogen atom or a methyl group, each of R.sup.31 to R.sup.33 independently represents a substituent or a hydrogen atom, each of R.sup.41 to R.sup.49 independently represents a substituent or a hydrogen atom, and each of R.sup.51 to R.sup.54 independently represents a hydrogen atom or a substituent.

##STR00001##

The disclosure provides an amphiphilic porous cyclodextrin polymer: cyclodextrin is grafted with aromatic molecules, and then alkylated with biphenyl benzylidene chloride and p-xylylene dichloride through Friedel-Crafts reaction, to obtain a porous polymer with an ultrahigh specific surface area. This material has very high adsorption capacity and can be reused for simple regeneration. Because the hydroxy groups of cyclodextrin are partially retained, the hydrophilicity of the material surface is improved, allowing the adsorption rate to become faster. Moreover, there are a variety of adsorption mechanisms, and hydrophobic and hydrophilic pollutants can be adsorbed simultaneously.

The disclosure provides an amphiphilic porous cyclodextrin polymer: cyclodextrin is grafted with aromatic molecules, and then alkylated with biphenyl benzylidene chloride and p-xylylene dichloride through Friedel-Crafts reaction, to obtain a porous polymer with an ultrahigh specific surface area. This material has very high adsorption capacity and can be reused for simple regeneration. Because the hydroxy groups of cyclodextrin are partially retained, the hydrophilicity of the material surface is improved, allowing the adsorption rate to become faster. Moreover, there are a variety of adsorption mechanisms, and hydrophobic and hydrophilic pollutants can be adsorbed simultaneously.